Aggregation Bias in the Factor Content of Trade: Evidence from U.S. Manufacturing
利用美国制造业数据，检验贸易要素含量测算中因行业加总导致的偏误，为研究者评估贸易对要素市场影响提供方法警示。
Aggregation Bias in the Factor Content of Trade: Evidence from U.S. Manufacturing by Robert C. Feenstra and Gordon H. Hanson. Published in volume 90, issue 2, pages 155-160 of American Economic Review, May 2000