Common trade exposure and business cycle comovement

Bilateral trade is considered a key driver of business-cycle transmission, as countries with higher bilateral trade have more correlated business cycles. We show, however, that when we account for the common trade exposure of a country pair to similar foreign cycles, the effect of bilateral trade on comovement falls sharply. Furthermore, common trade exposure is also a robust predictor of comovement. We conclude that trade is indeed a driver of business-cycle transmission, but often through common exposure to foreign cycles rather than just bilateral linkages. Finally, we consider the implications of these empirical results for the "trade-comovement puzzle."