Philippe Aghion, Peter Howitt, and Joel Mokyr. Philippe Aghion, research associate Peter Howitt, and NBER board member Joel ...

This paper examines the effects of tariffs along the supply chain using product-level data from a large U.S. wine importer in the context of the 2019-2021 U.S. tariffs on European wines. By combining ...

This paper provides systematic evidence on the macroeconomic consequences of war using a new dataset covering 115 conflicts and 145 countries over the past 75 years. We document three main findings.

China’s unprecedented expansion of higher education in 1999, increased annual college enrollment from 1 million to 9.6 million by 2020. We trace the global ripple effects of that expansion by ...

In addition to working papers, the NBER disseminates affiliates’ latest findings through a range of free periodicals — the NBER Reporter, the NBER Digest, the Bulletin on Health, and the Bulletin on ...

Cellphone bans in schools have become a popular policy in recent years in the United States, yet very little is known about their effects on student outcomes. In this study, we try to fill this gap by ...

What does homeless shelter achieve? We leverage administrative records of homeless services in Los Angeles County to construct a novel dataset of daily, site-level counts of shelter beds and occupants ...

How does ethnic identification vary with education among disadvantaged minorities? We study this question for Roma people, Europe's largest ethnic minority, using linked Romanian census data and birth ...

In addition to working papers, the NBER disseminates affiliates’ latest findings through a range of free periodicals — the NBER Reporter, the NBER Digest, the Bulletin on Health, and the Bulletin on ...

We examine global trends in productivity and sectoral dominance across countries and industries, asking whether changes are driven by productivity catch-up or shifts in factor endowments. To address ...

This paper provides a comprehensive overview of China’s lending to developing countries—a central feature of today’s international financial system. Building on our previous research and the work of ...