"The long dominance of Ricardo over Smith of comparative advantage over increasing returns was largely due to the belief that the alternative was necessarily a mess. In effect, the theory of international trade followed the perceived line of least mathematical resistance. Once it was clear that papers on noncomparative- advantage trade could be just as tight and clean as papers in the traditional mold, the field was ripe for rapid transformation." - Rethinking International Trade, 1990Contrary to assertions that I am sure I will get in the comment section about worshiping Krugman, this is not the case at all. This is a widely recognized point.
Friday Night Music: When I’m 64
22 hours ago