VRANCEANU Radu

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In some countries, including France, patients can choose between consulting a physician working in the regulated sector where, in general, fees are fully covered by health insurance (whether public, private or mixed), or a physician working in the unregulated sector, where a balance billing scheme operates. In the latter, fees might not be fully covered by health insurance, and patients must make out-of-pocket payments. The paper analyses the signalling properties of this mechanism in a context where patients are heterogenous with respect to their propensity to adhere to the prescribed treatment. The model reveals that a small extra fee allows to obtain a separating equilibrium in which only patients with a high propensity to adhere to the treatment will opt for the unregulated sector and benefit of a higher care effort on behalf of their physician. We also analyse the other equilibria of the game and comment on their welfare properties.

The positive correlation between health share expenditures and COVID-19 case fatalities in a cross-section of 31 European countries is puzzling. The positive relationships is also detected in weighted OLS and IV models that control for many usual suspects of the COVID-19 mortality: (1) health indicators (personal risk factors, medical resources), (2) virus ease of circulation, (3) macroeconomic variables related to the economic development and social orientation of the country. COVID-19 case fatalities are lower in countries with significant resources dedicated to health care (hospital beds and medical doctors). the contribution of virus circulation factors is less significant. Policy implications follow.

This research note reports results of a survey on student satisfaction with distance education in Korea and France as implemented in May 2020 on 510 respondents. At that time, both countries closed the facilities of higher education institutions and imposed the extensive use of on-line education. A majority of French students express a preference for in-class teaching compared with on-line teaching, while preferences of the Korean students are more balanced. On average, Korean students express higher satisfaction with online teaching compared to French students. Women students also report higher satisfaction scores. The COVID-19 stress is negatively related to satisfaction with online teaching in Korea, but not in France.

The important flows of irregular migration could not exist without the emergence of a criminal market for smuggling services. A matching model à la Pissarides (2000) provides a well-suited framework to analyze such a ‡ow market with significant trade frictions. Our analysis considers the competitive segment of this underground market in which small-business smugglers can freely enter. The model allows us to determine the equilibrium number of smugglers, the matching probability, the number of successful irregular migrants and, as an original concept, the equilibrium migrant welfare. Changes in parameters can be related to the various policies implemented by destination countries to cut down irregular migration.

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This paper reports data from a sender-receiver experiment that compares lying behavior between two groups of students, one in business administration and the other in medicine. We use a modified version of the sender-receiver deception game introduced by Erat and Gneezy (2012) to collect data on 393 subjects. The results show that both groups of students respond to incentives as expected: the frequency of lying is higher, the higher the benefit for the sender, and the lower the loss for the receiver is. For given payoffs, there is little difference between the two groups in the domain of white lies. however, business students resort to selfish lies more frequently than do medical students. Furthermore, the analysis does not confirm differences in altruism between the two groups.

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The French market for specialist physician care has a dual legal structure: physicians must exclusively work in sector 1 and charge regulated fees or in sector 2, where they can freely set their fees. Patient out-of-pocket payments in sector 2 are partially covered by private insurance. The primary differentiating factor between both sectors is the number of patients per specialist, which in turn directly affects the overall quality of the service provided. We built an equilibrium model to analyse both specialists decisions about which sector to work in, and patients choice of physician and therefore sector. More specifically, the model allowed us to study the effect of changes in prices and economy-wide patient-to-specialist ratios on profits and patients utility associated with the services provided in each sector.

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In the labor economics literature, discrimination is often defined as a situation in which identically productive workers, placed in the same working conditions, are treated unequally, being assigned contracts involving in particular different hourly wage rates. In the proposed analysis, the contract theory approach is applied, contributing to explain how in some circumstances such differences take place, even if contract discrimination and productivity differences are strictly ruled out. It is assumed that workers types differ only in their leisure consumption preferences and in their availability. A labor cost-minimizing firm offers a menu of labor contracts, and let workers self-select. In this non-discriminating setting the model reveals the possibility of a paradoxical situation in which the less demanding workers obtain a higher wage rate. It brings out external effects between types and the existence of a quantum (a minimum number) of demanded workers for some type.

This paper reports the results from a two-person "pledge and give" experiment. Each person’s endowment is private information available only to him. In the first stage, each agent informs the other about the amount he intends to give, or makes a pledge. In the second stage, each agent makes a contribution to the joint donation. A simple theoretical model shows that in this game the equilibrium pledge function is linear in the endowment of each agent. Furthermore, if agents have a strong taste for conformity, the optimal gift is positively related to one’s own endowment and to the pledge of his partner. Data from the lab experiment show that, indeed, subjects pledge approximately 60% of their endowment. Also, pledges have an important social influence role: an agent will increase his donation by 20 cents on average if his partner pledges one more euro.

This paper reports the results from a lab experiment in which subjects playing the manager role can implement either an efficient / inegalitarian allocation or an inefficient / egalitarian allocation of payoffs. The experiment simulates a stylized managerial context by allowing the manager to manipulate information and select the decision process and by allowing the stakeholders to retaliate against the manager given different choices in the decision process. We found that the inefficient allocation is often selected and that this choice depends on whether the employees can retaliate against the manager and on whether the manager can hide information about the payoffs. The social preferences of the manager also explain the choice of the option. However, the decision process and the managerial style based on self-reported attitudes have little influence on the choice of allocation. This is consistent with employee satisfaction essentially depending on the payoff and not being sensible to the process.

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This paper reports the results from a two-person "pledge and give" experiment. Each person’s endowment is private information available only to him. In the first stage, each agent informs the other about the amount he intends to give, or makes a pledge. In the second stage, each agent makes a contribution to the joint donation. A simple theoretical model shows that in this game the equilibrium pledge function is linear in the endowment of each agent. Furthermore, if agents have a strong taste for conformity, the optimal gift is positively related to one’s own endowment and to the pledge of his partner. Data from the lab experiment show that, indeed, subjects pledge approximately 60% of their endowment. Also, pledges have an important social influence role: an agent will increase his donation by 20 cents on average if his partner pledges one more euro.

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This paper uses the test/retest data from the Holt and Laury (2002) experiment to provide estimates of the measurement error in this popular risk-aversion task. Maximum likelihood estimation suggests that the variance of the measurement error is approximately equal to the variance of the number of safe choices. Simulations confirm that the coefficient on the risk measure in univariate OLS regressions is approximately half of its true value. Unlike measurement error, the discrete transformation of continuous riskaversion is not a major issue. We discuss the merits of a number of different solutions: increasing the number of observations, IV and the ORIV method developed by Gillen et al. (2019).

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Crowdfunding platforms are providing funds to an increasing number of projects, among which many have a strong social/community impact. Under a all-or-nothing program, the success of the investment depends on the ability of a crowd of potential investors to put their funds into the project without an explicit coordination device. With heterogeneous information, such a problem can be analyzed as a typical global game. We assume that signals of at least some agents present a systematic positive bias, driven by positive emotions about projects with high social/community impact. The analysis reveals that if the number of such overenthusiastic persons is large enough, crowdfunding finance might support financially inefficient projects. We then analyze how a monopolistic platform optimally determines transaction fees and unveil the relationship between overenthusiasm and the profit of the platform.

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This paper explains the observed hospital congestion in developing countries as the result of the interaction between ambulatory care physicians who refer patients to hospitals, and hospitals which must detect the severity of the incoming patients’disease. In an imperfect information environment, physicians might refer to top-tier hospitals patients with mild diseases that could be properly addressed by regular hospitals, just to ful…ll patients’demand for the best care. Yet, the triage capability of top-tier hospitals declines if the hospital is subject to congestion, which, in turn, provides incentives to physicians to refer more patients to these hospitals. The model presents two equilibria, one with perfect triage, and another with triage errors and hospital congestion. In this last equilibrium, a higher hospital size raises the likelihood of congestion.

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We design an experiment to investigate whether asking people to state how much they will donate to a charity (i.e., to pledge) increases their actual donation. Individuals’ endowment is either certain or a random variable. We study different types of pledges, namely, private, public and irrevocable, which differ in terms of the cost to the individual for not keeping the promise. We show that in absence of endowment uncertainty, private and public pledges are associated with lower donations as compared to donations in the no-pledge case: private pledges slightly reduce donations and public pledges reduce them more significantly. Donations increase with uncertainty (in terms of increased endowment dispersion) for both private and public pledge situations, although donations with private pledges remain higher than donations with public pledge.

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This paper presents experimental evidence on depositor behavior under partial deposit insurance schemes. In the experiment, the size of a deposit insurance fund cannot fully cover all deposits and the level of insurance depends on the number of depositors running on the bank. We show that this form of strategic uncertainty about deposit coverage exerts a significant impact on the propensity to withdraw, and results in a large frequency of bank runs. Runs are more likely when depositors have noisy information about the size of the insurance fund and as the maximum coverage increases, in line with a risk-dominant equilibrium selection mechanism. From a policy perspective, our results emphasize the limits of underfunded deposit insurance schemes in preventing systemic banking crises.

This paper analyses the relationship between regular and irregular migration taking into account the migration network effect and the network creation mechanism. We assume that migrants can obtain a high payoff only if a critical mass of migrants is reached in the destination country. If candidates to migration receive biased signals about the economic situation of the destination country, the migrants’ decision problem can be analyzed as a standard global game. Tying the quota of regular migrants to the economic performance of countries might create large discontinuities in immigration flows, with some countries attracting the bulk of irregular migrants and the other being shunned by the migrants.

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This paper analyzes the determinants of individual attitudes towards environmental action by means of an original PLSPM model of Environmental Awareness-Social Capital-Action (EASCA). Estimates build on survey data on 34.612 individuals from 42 different countries, as provided in the fifth wave of the World Value Survey (2005-2009). Besides the benchmark global estimates, we perform subsample analysis for developed and developing countries, as well as country analyses for four major economies: China, India, Germany and the United States. Doing so allows us to underline structural differences between countries or main groups of countries. In particular, we find that environmental awareness and trust in not-for profit organizations are the main determinants of individual action in support of environmentally friendly policies. The quality of environmental policymaking should improve if these cultural differences are better understood and taken into account.

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We introduce a dynamic public goods game, where an individual's investment in the public good at a given round provides benefits to other individuals in the next round, and the individual himself benefits from investments in the public good made by his current group members in the previous round. Subjects turn out to be more generous in this inter-temporal context, than in a standard public goods experiment where contributions and transfers are exchanged at the same period. Furthermore, when known, benefits from the past investment are positively related to the individual's current investment in the public good.

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This thesis consists of four essays on finance and the real economy. Chapter 1 studies the effect of banking crises on the composition of investment. It builds a partial equilibrium growth model with a banking sector and two types of investment projects: a safe, low return technology and an innovative, high productivity one. Investments in innovation are risky since they are subject to a liquidity cost which entrepreneurs cover by borrowing from the banking sector. When bank creditors are sufficiently pessimistic about the aggregate liquidity needs of the real sector, they will run on the bank and cause a credit freeze. This leads banks to tighten credit supply after the crisis, which decreases disproportionately investment in innovation and slows down economic growth. An empirical investigation, employing industry-level data on R&D investment around 13 recent banking crises, confirms this hypothesis. Industries that depend more on external finance, in more bank-based economies, invest disproportionately less in R&D following episodes of banking distress. These industries also have a relatively lower share of R&D in total investment, suggesting a shift in the composition of investment after the crisis. Such differential effects across sectors imply that the drop in R&D spending is, at least partially, the result of the contraction in credit supply.Chapter 2 studies the impact of coordination frictions in financial markets on the cost of capital. In the model, a financial intermediary seeks to raise funds to finance a risky capital-intensive project. Capital is owned by a large number of small investors, who observe noisy signals about the project's implementation cost. Employing a global games equilibrium refinement, we characterize a unique threshold equilibrium of the coordination game between investors. We then show that the relationship between the probability of success of the project and the rate of return on capital is non-monotonic. There exists a socially optimal price of capital, which maximizes the probability that the project is profitable. However, fee-maximizing intermediaries will generally set an interest rate that is higher than the socially optimal rate. The model best characterizes project finance investments funded through the bond market.Chapter 3 proposes a laboratory experiment to study the impact of partial deposit insurance schemes on the risk of deposit withdrawals. In the experiment, depositors decide whether to withdraw or leave their money in a bank, triggering a default when too many participants choose to withdraw. When a bank run occurs, the amount of wealth each depositor can recover depends on the number of withdrawals and a deposit insurance fund whose size cannot cover in full all depositors. We consider two treatments: (i) a perfect information case when depositors know the size of the insurance fund and (ii) a heterogeneous information setting when they only observe noisy signals about its size. Our results show that uncertainty about the level of deposit coverage exerts a significant impact on the propensity to run. The frequency of runs is relatively high in both treatments. A majority of subjects follow a threshold strategy consistent with a risk-dominant equilibrium selection. Finally, the last chapter re-examines the empirical relationship between financial and economic development while (i) taking into account their dynamics and (ii) differentiating between stock market and banking sector development. We study the cointegration and causality between finance and growth for 22 advanced economies. Our time series analysis suggests that the evidence in support of a finance-led growth is weak once we take into account the dynamics of financial and economic development. We show that, causality patterns depend on whether countries' financial development stems from the stock market or the banking sector.

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This paper analyzes the production of fundamental research as a coordination game played by scholars. In the model, scholars decide to adopt a new idea only if they believe that a critical mass of peers is following a similar research strategy. If researchers observe only a noisy idiosyncratic signal of the true scientiOc potential of a new idea, we show that the game presents a single threshold equilibrium. In this environment, fundamental research proceeds with large structural breaks followed by long periods of time in which new ideas are unsuccessful. The likelihood of a new idea emerging depends on various parameters, including the rewards of working in the old paradigm, the critical mass of researchers required to create a new school of thought and scholarsi ability to properly assess the scientific value of new ideas.

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This paper reports results from a three-player variant of the ultimatum game in which the Proposer can delegate to a third party his decision regarding how to share his endowment with a Responder with a standard veto right. However, the Responder cannot verify whether the delegation is effective or the third party merely plays a “scapegoat” role while the decision is made by the Proposer himself. In this imperfect information setting, the Proposer can send an unverifiable message declaring his delegation strategy. The most interesting strategy is “false delegation”, in which the Proposer makes the decision but claims to have delegated it. In our sample, the recourse to false delegation is significant, and a significant number of potential Delegates accept serving in the scapegoat role. However, there are many honest Proposers, and 20% of all Delegates will refuse to be the accomplices of a dishonest Proposer. Responders tend to more readily accept poor offers in a setup that permits lying about delegation. the acceptance rate of the poor offer is the highest when Delegates can refuse the scapegoat role.

This paper reports results from a real-e ort experiment in which men and women are paired to form a two-member team and asked to execute a real-eff ort task. Each participant receives an equal share of the team's output. Workers who perform better than their partner can punish him/her by imposing a fi ne. We manipulate the teams' gender composition (man-man, man-woman, and woman-woman) to analyze whether an individual's performance and sanctioning behavior depends on his/her gender and the gender interaction within the team. The data show that, on average, men perform slightly better than women. A man's performance will deteriorate when paired with a woman, while a woman's performance will improve when paired with a woman. When underperforming, women are sanctioned more often and more heavily than men. if sanctioned, men tend to improve their performance, while women's performance does not change.

The paper reports results from an Ultimatum Game experiment with asymmetric information where Proposers can send to Responders misleading information about their endowment. We allow for all possible gender combinations in the Proposer-Responder pairs. Proposer messages that underestimate the actual amount are quite widespread. The frequency of lying is slightly higher in mixed groups. Conditional on lying, men tend to state bigger lies than women. On the other hand, women tend to tell smaller lies when paired with men, than when paired with women. In general, women present higher acceptance rates than men.

This paper reports results from a three-player variant of the ultimatum game in which the Proposer can delegate to a third party his decision regarding how to share his endowment with a Responder with a standard veto right. However, the Responder cannot verify whether the delegation is effective or the third party merely plays a “scapegoat” role while the decision is made by the Proposer himself. In this imperfect information setting, the Proposer can send an unverifiable message declaring his delegation strategy. The most interesting strategy is “false delegation”, in which the Proposer makes the decision but claims to have delegated it. In our sample, the recourse to false delegation is significant, and a significant number of potential Delegates accept serving in the scapegoat role. However, there are many honest Proposers, and 20% of all Delegates will refuse to be the accomplices of a dishonest Proposer. Responders tend to more readily accept poor offers in a setup that permits lying about delegation. the acceptance rate of the poor offer is the highest when Delegates can refuse the scapegoat role.

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The paper reports results from an Ultimatum Game experiment with asymmetric information where Proposers can send to Responders misleading information about their endowment. We allow for all possible gender combinations in the Proposer-Responder pairs. Proposer messages that underestimate the actual amount are quite widespread. The frequency of lying is slightly higher in mixed groups. Conditional on lying, men tend to state bigger lies than women. On the other hand, women tend to tell smaller lies when paired with men, than when paired with women. In general, women present higher acceptance rates than men.

This paper analyzes how banks' funding constraints impact the access and cost of capital of small firms. Banks raise external finance from a large number of small investors who face co-ordination problems and invest in small, risky businesses. When investors observe noisy signals about the true implementation cost of real sector projects, the model can be solved for a threshold equilibrium in the classical global games approach. We show that a "socially optimal" interest rate that maximizes the probability of success of the small firm is higher than the risk-free rate, because higher interest rates relax the bank's funding constraint. However, banks will generally set an interest rate higher than this socially optimal one. This gives rise to a built-in inefficiency of banking intermediation activity that can be corrected by various policy measures.

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This paper analyzes how banks' funding constraints impact the access and cost of capital of small firms. Banks raise external finance from a large number of small investors who face co-ordination problems and invest in small, risky businesses. When investors observe noisy signals about the true implementation cost of real sector projects, the model can be solved for a threshold equilibrium in the classical global games approach. We show that a "socially optimal" interest rate that maximizes the probability of success of the small firm is higher than the risk-free rate, because higher interest rates relax the bank's funding constraint. However, banks will generally set an interest rate higher than this socially optimal one. This gives rise to a built-in inefficiency of banking intermediation activity that can be corrected by various policy measures.

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This paper analyzes the production of fundamental research as a coordination game played by scholars. In the model, scholars decide to adopt a new idea only if they believe that a critical mass of peers is following a similar research strategy. If researchers observe only a noisy idiosyncratic signal of the true scientifi…c potential of a new idea, we show that the game presents a single threshold equilibrium. In this environment, fundamental research proceeds with large structural breaks followed by long periods of time in which new ideas are unsuccessful. The likelihood of a new idea emerging depends on various parameters, including the rewards of working in the old paradigm, the critical mass of researchers required to create a new school of thought and scholars’ ability to properly assess the scientifi…c value of new ideas.

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This paper analyzes the consequences of allowing for punishment in a real‐effort pair production experiment. The behavior of the best performer in the team differs on whether he or she can impose a sanction on the less performing partner. When sanctions are not allowed, good performers reduce their effort in response to the advantageous difference in scores. when they can impose sanctions, their change in effort is no longer related to the difference in scores. To some extent, a sanction mechanism allows good performers to focus on their own performance. In the case of costless sanctions, not sanctioning a partner who under‐performs, what we refer to as forgiveness, prompts the latter to improve his or her performance, but applying the sanction has a stronger push effect. Copyright © 2014 John Wiley & Sons, Ltd.

In the model, a group of investors are invited to participate to a high-yield collective project. The project succeeds only if a minimum participation rate is reached. Before taking their decision, investors receive a vague statement about the outcome of a past investment decision. If investors believe that the message has an impact on the beliefs of the others, the problem can be analyzed as a typical global game and would present a threshold equilibrium. If not, in theory both an equilibrium where all invest and an equilibrium where no one invests can occur. In a Lab experiment, a large number of subjects adopt switching strategies consistent with the threshold equilibrium and appear to respond to the orientation of the message. Insights apply to contagion and market manipulation episodes.

This paper brings experimental evidence on investors' behavior subject to an "illiquidity" constraint, where the success of a risky project depends on the participation of a minimum number of investors. The experiment is set up as a frameless coordination game that replicates the investment context. Results confirm the insidious nature of the illiquidity risk: as long as a first illiquidity default does not occur, investors do not seem able to fully internalize it. After several defaults, agents manage to coordinate on a default probability above which they refuse to participate to the project. This default probability is lower than the default probability of the first illiquidity default.

Humans often lie strategically. We study this problem in an ultimatum game involving informed proposers and uninformed responders, where the former can send an unverifiable statement about their endowment. If there are some intrinsically honest proposers, a simple message game shows that the rest of them are likely to declare a lower-than-actual endowment to the responders. In the second part of the paper, we report on an experiment testing this game. On average, 88.5% of the proposers understate the actual endowment by 20.5%. Regression analysis shows that a one-dollar gap between the actual and declared amounts prompts proposers to reduce their offer by 19 cents. However, responders appear not to take such claims seriously, and thus the frequency of rejections should increase. The consequence is a net welfare loss, that is specific to such a "free-to-lie" environment.

This paper analyzes how faculty members dynamically allocate their efforts between improving their research and teaching skills, taking into account the organizational structures and incentives implemented by academic institutions. The model builds on the assumption that organizational structures have an impact on the nature of spillover effects between teaching and research competencies. We analyze the dynamic equilibrium under unilateral and bilateral spillovers, using the no-spillover case as a benchmark. The bilateral spillover case is the most appealing as it achieves the highest overall performance. however, the nature of the equilibrium and the career paths can be quite different depending on the parameters of the problem such as the obsolescence of competencies or the strength of the spillover effect. This finding provides interesting insights on what could be the most productive configuration of a higher education institution.

We investigate the dynamics of cooperation in public good games when contributions to the public good are immediately redistributed across contributors (intra-temporal transfers) and when contributions to the public good by the current group are transferred over time to a future group (inter-temporal transfers). We show that people are more cooperative in inter-temporal contexts than in intra-temporal contexts. We also find that subjects invest more on average in public goods when they know in advance their inheritance from the past.

This policy paper aims at presenting the key facts related to the Euro sovereign debt crisis that occurred in the interval 2010-2012. It points out some main coordination failures that are at the origin of the crisis, and comments on the effectiveness of various stabilization measures undertook by governments and the EU institutions.

This policy paper aims at presenting the key facts related to the Euro sovereign debt crisis that occurred in the interval 2010-2012. It points out some main coordination failures that are at the origin of the crisis, and comments on the effectiveness of various stabilization measures undertook by governments and the EU institutions.

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Gladiatorial combat was in reality a lot less lethal than it is depicted in the cinema. This short paper highlights how cooperative strategies could have prevailed in the arenas, which is generally what happened during the Games. Cooperation in the arena corresponded to a situation of the professionalization of gladiators, who been trained in gladiatorial schools. This case provides an analogy of the conditions under which cooperation occurs in a context of competition between rival companies.

This paper reports the results from a real-effort team production experiment, where best performers can impose either tacit or explicit sanctions on their less-performing partners. The behavior of the best performer in the team differs from one condition to another. When explicit sanctions are not allowed, good performers reduce their effort in response to the advantageous difference in scores. when they can impose sanctions, their change in effort is no longer related to the difference in scores. To some extent, a mechanism of explicit sanctions allows good performers to focus on their own performance. Not sanctioning an opponent who under-performs, what we refer to as forgiveness, prompts the latter to improve his performance, but applying the sanction has a stronger effect.

We investigate the dynamics of cooperation in public good games when contributions to the public good are immediately redistributed across contributors (intra-temporal transfers) and when contributions to the public good by the current group are transferred over time to a future group (inter-temporal transfers). We show that people are more cooperative in inter-temporal contexts than in intra-temporal contexts. We also find that subjects invest more on average in public goods when they know in advance their inheritance from the past.

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We investigate the dynamics of cooperation in public good games when contributions to the public good are immediately redistributed across contributors (intra-temporal transfers) and when contributions to the public good by the current group are transferred over time to a future group (inter-temporal transfers). We show that people are more cooperative in inter-temporal contexts than in intra-temporal contexts. We also find that subjects invest more on average in public goods when they know in advance their inheritance from the past.

In the model, a group of investors are invited to participate to a high-yield collective project. The project succeeds only if a minimum participation rate is reached. Before taking their decision, investors receive a vague statement about the outcome of a past investment decision. If investors believe that the message has an impact on the beliefs of the others, the problem can be analyzed as a typical global game and would present a threshold equilibrium. If not, in theory both an equilibrium where all invest and an equilibrium where no one invests can occur. In a Lab experiment, a large number of subjects adopt switching strategies consistent with the threshold equilibrium and appear to respond to the orientation of the message. Insights apply to contagion and market manipulation episodes.

This paper reports the results from a real-effort team production experiment, where best performers can impose either tacit or explicit sanctions on their less-performing partners. The behavior of the best performer in the team differs from one condition to another. When explicit sanctions are not allowed, good performers reduce their effort in response to the advantageous difference in scores. when they can impose sanctions, their change in effort is no longer related to the difference in scores. To some extent, a mechanism of explicit sanctions allows good performers to focus on their own performance. Not sanctioning an opponent who under-performs, what we refer to as forgiveness, prompts the latter to improve his performance, but applying the sanction has a stronger effect.

Economic profit is produced by entrepreneurs, those special individuals able to detect and seize as yet unexploited market opportunities. In general capitalist firms manage to deliver positive profits even in the most competitive environments. They can do so thanks to internal entrepreneurs, a subset of their employees able to drive change and develop innovation in the workplace. This paper argues that the goal of profit maximization is fully consistent with the corporation doing good for society. However, there is little justification for corporations to transfer the whole economic profit to shareholders. Economic agents entitled to receive the economic profit are precisely those who create this profit, namely the internal entrepreneurs.

This paper analyzes how faculty members dynamically allocate their efforts between improving their research and teaching skills, taking into account the organizational structures and incentives implemented by academic institutions. The model builds on the assumption that organizational structures have an impact on the nature of spillover effects between teaching and research competencies. We analyze the dynamic equilibrium under unilateral and bilateral spillovers, using the no-spillover case as a benchmark. The bilateral spillover case is the most appealing as it achieves the highest overall performance. however, the nature of the equilibrium and the career paths can be quite different depending on the parameters of the problem such as the obsolescence of competencies or the strength of the spillover effect. This finding provides interesting insights on what could be the most productive configuration of a higher education institution.

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This thesis proposes a model of intertemporal choice based on the hypothesis of a rational individual with imperfect knowledge of his temporal preferences. At the moment of choice, the individual seeking cognitive consistency reconciles several successive cognitions: his normative preference represented by the expected utility (DU) model - which he perceives with more or less precision - and one or several myopic preferences dictated by the context of the decision. We first deal with the general case of a myopic preference for the closest reward in time. This preference, generated by a primacy effect in the perception of income or consumption, leads the individual to adopt a quasi-hyperbolic discount in all his intertemporal choices, explaining a large number of anomalies in the DU model. We then discuss the case where one of the choice options gives rise to a "visceral" preference and the case where one option is the status quo, leading to new inconsistencies. We test the general "sequential discounting" model and the status quo model with experimental data. Finally, we apply the modeling to life cycle savings decisions. The individual is assumed to be permanently subject to consumption signals that induce a preference for immediate consumption that he cannot anticipate. In doing so, he constantly experiences excess consumption compared to his plans. We show that the existence of an illiquid asset can allow him to constrain his future consumption and avoid a critical savings shortfall at the time of retirement.

The biotechnology patent system has inherent deficiencies when the subject matter of biotechnology research is introduced. These shortcomings are reflected, on the one hand, in the growing number of legal conflicts that arise in this sector and, on the other hand, in a slowdown in the scientific emulation necessary for the progress of science and technology. In order to compensate for these deficiencies, a market for the insurance of the costs of legal conflicts tends to be set up. These insurances do not contribute to the efficiency of the patent system and of the sector, as they encourage innovators to claim broad patents, thus encouraging legal conflicts and slowing down the dynamics of innovation. R&D contracts are another way of getting around the failings of the patent system, but here again, inefficiencies arise insofar as it is generally the innovative SMEs that take charge of patent defense.

The purpose of this thesis is to analyze the fundamental issues related to the introduction, development and operation of pension funds. First, the question of the feasibility of a Pareto-improving transition from a pay-as-you-go to a funded pension system is raised. The analysis carried out shows that taking uncertainty into account, in the framework of an endogenous growth model, can invalidate the result of the certain case, affirming the feasibility of such a reform. Once the transition has taken place, the question arises as to the effects of the reform, which may call for an adaptation of policies. The analysis focuses on one important effect: the increased role of stock price changes in consumer spending, reflecting an increase in the wealth effect of the stock market. The results of the study, based on the example of the US economy, suggest that this development leads to an increase in macroeconomic instability and calls for a more pronounced inclusion of stock price changes in the Fed's reaction function. The structure and functioning of pension funds are analyzed in a third step. The theory of options first defines the tool of analysis, and a global study of the different levels of application of this theory constitutes the objective of the analysis. This study allows the definition of the main option incorporated in pension funds. We conclude that the different possible formulations of the strike price strongly influence its characteristics. Finally, we define a unified framework for determining and comparing optimal asset allocations of the main types of pension funds. Similarities between the investment strategies adopted by the different funds are highlighted. The analysis also shows that the provision of guarantees by external organizations can lead to a more aggressive optimal investor strategy.

The main objective of this thesis is to propose an explanation of unemployment in the countries of Central and Eastern Europe (CEEC), currently in transition to a market economy. First, the literature on transition allows us to position the problem of unemployment in this general economic context. Second, three main causes of unemployment are identified: the contraction of aggregate demand (cyclical unemployment), labor shifts between industries (restructuring unemployment), and some degree of wage rigidity (structural unemployment). The microeconomic foundations of the first two categories of unemployment are studied in the light of standard theories. For the latter, we propose an original explanation, which takes into account the impact on unemployment of the institutions and mechanisms in force in the labor market of the CEECs. Once the conceptual framework is specified, we analyze the problem of unemployment in the concrete case of an economy in transition, that of Romania. The progress of reforms and the creation of a labor market are presented in detail. A vector autoregressive model of the Romanian economy allows us to draw conclusions about the relative weight of the factors determining the growth of unemployment. Finally, we propose several economic policy recommendations aimed at the reform strategy in general and the functioning of the labor market in particular.