전망·동향
Dynamic Adjustment to Trade Shocks
Global trade flows and supply chains adjust gradually. Empirical estimates of the trade elasticity for the short run are a fraction of those for the long run and suggest that trade is subject to substantive dynamic frictions. We develop a tractable framework that provides microfoundations for trade adjustment and rationalizes estimation of a time-varying trade elasticity. The model features forward-looking firms facing sticky sourcing choices and nests a version of the Eaton-Kortum model as a limiting long- run case. We calibrate the model and quantify the impacts of two events: the 2004 EU Eastern enlargement (an anticipated change) and the 2018 US-China trade war (an arguably unanticipated change). Our findings suggest that sourcing frictions and anticipation effects alter the time pattern of specialization, can result in short-term welfare losses but long-term gains, and can drive marked trade adjustments before anticipated shocks occur.
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