Research QuestionIn 2018 and 2019, the USA imposed additional import tariffs on Chinese goods. We investigate the extent to which the effect on US (post-tariff) import prices was offset by the concurrent appreciation of the US dollar. In addition, we ask whether US trade policy itself triggered the US dollar appreciation.
ContributionWe show that the exchange rate response to a trade policy uncertainty shock is key to assessing the overall impact of trade policies. We identify trade policy uncertainty shocks as well as tariff rate shocks within a structural vector autoregressive (SVAR) model of the US economy. In this framework, we investigate the appreciation of the USD during the height of the trade conflict. We then build an open economy New Keynesian model featuring financial frictions in banks' asset holdings to trace out the channels underlying the link between uncertainty regarding future trade policy and the US dollar. Moreover, we assess the relevance of the induced USD appreciation in 2018 and 2019 for import prices of Chinese products in order to address the question of whether the effects of tariff hikes were (partly) offset.
ResultsWe find that increases in trade policy uncertainty were the main driver in the USD appreciation in 2018/2019. The theoretical model rationalizes this finding with an increase in the relative demand for safe US assets by risk-averse investors in face of increased trade policy uncertainty. With regard to offsetting effects, we find that Chinese exporters react to a USD appreciation by markedly lowering their US dollar-denominated export prices. This holds in particular for intermediate goods exporters, who had been the main focus of new tariffs. Overall, our results suggests that the trade policy-induced share of the US dollar appreciation in 2018/2019 offset a sizable part of the tariff increase on post-tariff import prices.