Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper examines how production techniques differ across countries, factors, and industries and considers its implications for previous empirical evidence on the Vanek prediction. I find that production techniques differ substantially across countries and factors, but differ much less across industries within a country. Davis and Weinstein (2001) argue that modeling cross-industry differences (multiple-cone specialization) improves the fit of the Vanek prediction; however, their test statistics are unchanged when one restricts techniques to be identical across industries within a country. Thus, the bulk of world factor content of trade does not arise from specialization.