This study examines the impact of ambient air pollution on birth rates in Europe. We estimate the causal effect of air pollution on fertility by utilizing variations in wind speed and the number of heating days as instrumental variables for air quality. Our analysis encompasses 657 NUTS-3 regions, with each region having 2 to 6 years of observations between 2015 and 2020. Thus, our study is the first to extend this analysis to multiple countries, pollutants, and years. Our findings indicate that a one standard deviation increase in particulate matter concentration levels leads to a 5.1% decrease in birth rates the following year and an additional 5.9% decrease two years later. Moreover, a similar increase in air pollution has a more pronounced adverse effect on fertility in countries with lower GDP. Other pollutants have little role in shaping fertility outcomes. This result is important for environmental policies with limited resources.

Disability benefits are costly and tend to reduce labor supply. While spending can be contained by careful targeting, correcting past flaws in eligibility rules or assessment procedures may entail welfare costs. We study a major reform in Hungary that reassessed the health and working capacity of a large share of beneficiaries while leaving work incentives unchanged. Leveraging birthday and health cutoffs in the reassessment, we estimate employment responses to termination or reduction of benefits driven by income effects. We find that among those who exited disability insurance due to the reform, 60% were employed in the primary labor market, 3% participated in public works and 37% were out of work without benefits in the post-reform period. The consequences of exiting disability insurance sharply differed by pre-reform employment status. 80% of beneficiaries who had some employment in the pre-reform year worked in the primary labor market, compared to only 38% of those without pre-reform employment.