Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
The present article aims to empirically examine a relationship between trade openness and the pattern of vertical integration using the six‐digit North American Industry Classification System (NAICS) of U.S. manufacturing data from 2002 to 2006. We use the index of vertical integration made out of inter‐plant transfers data by the U.S. Census Bureau, and we consider three proxies of trade openness—import penetration, export shares, and trade penetration. The empirical results substantiate theoretical proposition that trade openness undermines motives for vertical integration.