Does trade policy uncertainty push exposed industries toward automation?
Core argument: Industries more exposed to trade policy uncertainty showed greater reductions in imported intermediate goods and larger increases in automation following heightened uncertainty, in industry-level data running through 2022 that excludes the most recent surges.
Figure 4 reports the estimated relationships of an industry’s robot density, imports of intermediate goods, productivity, and employment with the industry’s relative exposure to TPU. [The TPU index is based on the frequency of articles in major U.S. newspapers that discuss economic policy uncertainty and mention trade policy. “Relative” means that TPU is interacted with] the industry’s initial exposure to trade measured by the share of imported intermediate goods in gross output at the start of our sample in 2004. Our industry-level data are available through 2022, [so the sample doesn't include] the most recent surges in TPU. Following heightened TPU, industries that are more exposed to TPU experienced greater reductions in imported intermediate goods and larger increases in automation. Those industries also experienced a boost in productivity, partly reflecting the rise in automation. However, the estimated relationship between an industry’s employment and its exposure to TPU is close to zero, suggesting that the employment effects of TPU for firms in exposed industries are not much different from less-exposed [ones], likely because automation leads to the elimination of some jobs and the creation of others.

