China's emergence as a great economic power has induced an epochal shift in patterns of
world trade. Simultaneously, it has challenged much of the received empirical wisdom about …

This chapter reviews a recent body of theoretical and empirical work that studies the
normative and positive aspects of trade policy. We start by presenting reduced-form …

We document that between 50% and 70% of changes in the US wage structure over the last
four decades are accounted for by relative wage declines of worker groups specialized in …

We study the role of global supply chains in the impact of the Covid-19 pandemic on GDP
growth using a multi-sector quantitative framework implemented on 64 countries. We …

The US-China trade war created net export opportunities rather than simply shifting trade
across destinations. Many “bystander” countries grew their exports of taxed products into the …

We study inference in shift-share regression designs, such as when a regional outcome is
regressed on a weighted average of sectoral shocks, using regional sector shares as …

The Bartik instrument is formed by interacting local industry shares and national industry
growth rates. We show that the typical use of a Bartik instrument assumes a pooled …

We evaluate the duration of the China trade shock and its impact on a wide range of
outcomes over the period 2000 to 2019. The shock plateaued in 2010, enabling analysis of …

Has rising import competition contributed to the polarization of US politics? Analyzing
multiple measures of political expression and results of congressional and presidential …

We study the effects of negative supply shocks and shocks to the composition of final
demand on aggregate output in a disaggregated neoclassical model with multiple sectors …