This paper shows that Cournot competition in segmented markets generate both intra-industry trade and the gravity equation. The paper also demonstrates that the gravity equation holds if and only if the market shares of an exporting country do not depend on the market where it sells. Thus, the...

This paper derives the gravity equation with intermediate goods trade. We extend a standard monopolistic competition model to incorporate intermediate goods trade, and show that the gravity equation with intermediates trade is identical to the one without it except in that gross output should be...