The Grand Paris Express: the seven keys to success.

Summary The 4th cover states: "Will the Grand Paris Express bring the considerable benefits expected by the community and under what conditions? Based on the most recent knowledge on the subject, this book proposes seven theses. The Grand Paris Express represents a technological revolution, revolutionizing the role of public transport in the Paris conurbation. After a debate that is now outdated, it has become a reality, and it will be a powerful urban transformer and a lever for growth for the capital region and the country. It is an investment with a high potential return for the national economy and public finances, but its implementation must be managed on the basis of the most recent knowledge of megaproject management in order to best control the changes in costs and deadlines that are common in this type of project. It is an illustration of what economics can contribute today to inform public debate and collective decision-making. To this end, the book proposes to evolve the framework of economic calculation and decision-making processes to take into account both the richness and complexity of the knowledge required today to correctly apprehend large-scale projects such as the Grand Paris Express, and the need for public opinion to share the issues at stake in modern democracies, at all stages of the decision and implementation process.