You should consider this place for your next vacation. I came for work, but I have been consistently charmed and delighted. Posted by Tyler Cowen on July 30, 2005 at 06:08 AM in Economics | Permalink ... It just means that the conventional framing of markets via Walras-Arrow-Debreu is too narrow. Price heterogeneity, ruled out by construction in Walrasian theory, is an important characteristic of many real markets, and is something that is easy to include in models of ...