Einstein's point about relativity, there is no Magic Walrus

Brad Delong finds this gem:

 First the Walrasian interpretation in which prices are centrally computed by an auctioneer. Recent results on the computational complexity are reviewed. The non-polynomial complexity of these algorithms makes Walrasian general equilibrium an implausible conception. Second, a decentralised picture of market processes is described, involving concurrent exchange within transient coalitions of agents. These processes feature price dispersion, yield allocations that are not in the core, modify the distribution of wealth, are always stable, but path-dependent. Replacing the Walrasian framing of markets requires substantial revision of conventional wisdom concerning markets. 

We can give Roger Farmer some Kudos for multi-equilibrium.  We engage in kinetic energy, and in the case of economics,that is price discovery.  It never reaches a conclusion, we are bound to obey Ito's calculus.  Also, this is Arnold Kling's point, and means regime change,as used by Jim Hamilton works.  So we do have some economists looking good from the whole 250 years error..