Publications des chercheurs de PSE

Measuring and understanding the evolution of wealth inequality is a key challenge for researchers, policy makers, and the general public. This paper breaks new ground on this topic by presenting a new method to estimate and study wealth inequality. This method combines fiscal data with household surveys and national accounts in order to provide annual wealth distribution series, with detailed breakdowns by percentiles, age and assets. Using the case of France as an illustration, we show that the resulting series can be used to better analyze the evolution and the determinants of wealth inequality dynamics over the 1970-2014 period. We show that the decline in wealth inequality ends in the early 1980s, marking the beginning of a rise in the top 1% wealth share, though with significant fluctuations due largely to asset price movements. Rising inequality in saving rates coupled with highly stratified rates of returns has led to rising wealth concentration in spite of the opposing effect of house price increases. We develop a simple simulation model highlighting how changes in the combination of unequal saving rates, rates of return and labor earnings that occurred in the early 1980s generated large multiplicative effects that led to radically different steady-state levels of wealth inequality. Taking advantage of the joint distribution of income and wealth, we show that top wealth holders are almost exclusively top capital earners, and less and less are made up of top labor earners; it has become increasingly difficult in recent decades to access top wealth groups with one’s labor income only.

This paper is the first to compute lifetime earnings (LTE) in France for a large number of cohorts entering the labour market between 1967 and 1987, and to analyze their main determinants, as well as those of the evolution of the gender gap in LTE. We compare our results with evidence by Guvenen et al. (2022a) for the US, documenting sharp differences between the two countries. Median LTE show similar flat trends in both countries, but in France this results from a moderate increase for both genders together with increased female participation, while in the US, LTE declines for men and sharply grows for women. There have been marked changes in age profiles, as for both genders younger cohorts have experienced a decrease in entry wages that has been more than offset by faster wage growth. Our analysis of inequality finds that it is lower when we focus on LTE than in the cross-section, and that it follows a U-shaped pattern, although the increase is much smaller in France than that observed in the US. Lastly, we also find that i) education (returns and changes in attainment) plays a key role in shaping LTE across cohorts, ii) place of birth has a large influence on lifetime earnings and iii) differences in working time explain an increasing part of the gender gap in LTE over time as both men and women have increased the number of years they work but women have done so largely through part-time employment.

Using exhaustive administrative wealth and income tax data, we study a French wealth tax reform that scaled back information reporting requirements below a certain wealth threshold. We develop a dynamic bunching approach that permits estimating the average response to the reform, the share of compliers, and the LATE. Reported wealth declines sharply in response to the reform and annual wealth growth rates are on average 20% lower among affected taxpayers. This decline appears due to increased evasion facilitated by the lower reporting requirements, as suggested by the fall in self-reported wealth but the lack of response in third-party-reported labor and capital incomes. By contrast, the elasticities to tax rates estimated are very small and insignificant. This illustrates the critical role of information reporting policies in shaping taxpayers' behavior.

This literature review describes the recent empirical literature in economics and finance focusing on how climate change‐related risks affect banks, with a particular emphasis on microeconomic evidence. The comparison of empirical estimates shows that many studies project limited estimates of damages for banks. For both loan and bond spreads, most estimates of the effect of climate change are below 50 bp. In comparison, studies on stock markets document responses that are more substantial. In real estate markets, there is evidence of price effects notably for flood risks associated with sea level rise. However, some studies indicate that climate risks could be underestimated. We note challenges related to the measurement of adaptation potential, non‐linear changes in hazards and responses, and the aggregation of effects across studies, markets, and bank portfolios.

Skilled migration is seen as a solution against skill shortages, but its impact on native workers facing increased competition remains debated. To investigate the longer-term potential for displacement, this paper exploits a 2008 reform in France facilitating the hiring of foreign workers within a list of tight occupations. The analysis relies on administrative data and applies a difference-in-differences approach. Results show that the reform successfully boosted migrant hires without affecting native employment. In addition, the negative pressure on occupational wages is much larger among migrants than natives, suggesting that such policies can be a viable solution in the long run.

We derive wage equations with individual specific coefficients from a structural model of human capital investment over the life cycle. This model allows for interruptions in labour market participation and deals with missing data and attrition problems. We propose a new framework that deals with missingness at random and is based on factor decompositions that allow for flexible control of selection. Our approach leads to an interactive effect wage specification, which we estimate using long administrative panel data on male wages in the private sector in France. A structural function approach shows that interruptions negatively affect average wages. Interestingly, they also negatively affect the inter-decile range of wages after twenty years. This is only partly due to the fact that interruptions are endogenous.

La réforme du salaire journalier de référence est entrée en vigueur le 1er octobre 2021 dans le cadre d’une refonte globale de l’Assurance chômage en France. Pour les demandeurs d’emploi ayant alterné périodes travaillées et de non-travaillées avant d’accéder à une indemnisation, cette réforme allonge la durée maximale des allocations chômage tout en en réduisant le montant. Cette étude évalue l’impact de cette réforme sur les trajectoires professionnelles, en tenant compte de l’exposition hétérogène des individus à la réforme. Celle-ci dépend directement du temps passé sans emploi entre le premier et le dernier jour travaillé au cours des deux dernières années.

We study the effects of the SRU law introduced in France in December 2000 to support scattered development of public housing in cities and favor social mixity. This law imposes 20% of public dwellings to all medium and large municipalities of large-enough cities, with fees for those not abiding by the law. Using exhaustive fiscal data, we evaluate the effects of the law over the 1996-2008 period using a difference-in-differences approach at the municipality and neighborhood levels. We find that the law stimulated public housing construction in treated municipalities, but only slightly increased the presence of low-income households. Indeed, new public dwellings enter categories to which medium-income are eligible and most additional occupants are not poor. Within municipalities, the policy decreased public housing segregation but it barely decreased low-income segregation. This comes from local authorities increasing over time the presence of public dwellings in neighborhoods away from existing public housing but in places concentrating low-income households.

We study a large market model of dynamic matching with no monetary transfers and a continuum of agents who have to be assigned items at each date. When the social planner can only elicit ordinal agents' preferences, we prove that under a mild regularity assumption, incentive compatible and ordinally efficient allocation rules coincide with spot mechanisms. The latter specify “virtual prices” for items at each date and, for each agent, randomly select a budget of virtual money at the beginning of time. When the social planner can elicit cardinal preferences, we prove that under a similar regularity assumption, incentive compatible and Pareto efficient mechanisms coincide with spot menu of random budgets mechanisms. These are similar to spot mechanisms except that, at the beginning of time, each agent chooses within a menu, a distribution over budget of virtual money.

We explore the consequences of the development of home working for wages, hours worked and employee health in the post COVID era. We base our research strategy on a French law passed in 2017 to encourage telework agreements between employers and employees. In the months following the law, many establishments signed telework agreements, and we show that this subsequently led to a much greater development of home working in these establishments after the epidemic shock in 2020. This increase was particularly significant in mid-level occupations, and was followed by a deterioration in the health of the employees concerned, particularly men.

This paper shows that even moderate air pollution levels, such as those in Europe, harm the economy by reducing firm performance. Using monthly firm-level data from France, we estimate the causal impact of fine particulate matter (PM 2.5 ) on sales and worker absenteeism. Leveraging exogenous pollution shocks from local wind direction changes, we find that a 10 percent increase in monthly PM 2.5 exposure reduces firm sales by 0.4 percent on average over the next two months, with sector-specific variation. Simultaneously, sick leave rises by 1 percent. However, this labor supply reduction explains only a small part of the sales decline. Our evidence suggests that air pollution also reduces worker productivity and dampens local demand. Aligning air quality with WHO guidelines would yield economic benefits on par with the costs of regulation or the health benefits from reduced mortality.

Although in-service teacher training programs are designed to enhance the performance of several cohorts of students, there is little evidence on the persistence of their effects. We present the two-year results of a randomized study of an intensive in-service teacher training program conducted in France during and after the training program's implementation. Our results highlight the short-run effectiveness of the training program: it successfully improves students' performance but only during the implementation year. A detailed analysis of teachers' outcomes indicates that teachers changed their pedagogical vision and practices but afterward struggled to apply skills to contents not directly covered during training.