This paper examines the multi-cone specification of the factor proportion theory of international trade. I show that Helpman's bilateral restrictions on the factor of content of trade, which have found recent empirical support by Choi and Krishna (2004), need to be amended to account for...

The major obstacle to the testing of trade theories has been the difficulty of constructing tests that is theoretically sound. The intuitive content of most trade theories is quite simple and straightforward. But empirical tests of the theories are often faulted on the grounds that they test...