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In a previous post we queried whether the theory of the consumer as developed in the first three chapters of Mas-Colell, Whinston and Green (and indeed other comparable texts) provides anything by way of content beyond what is implied by the abstract description of consumers as agents who are maximizing something. [We did not discuss chapter four, on aggregation of demand, to which we may return later]. As we noted then, a comparable point can be made about the theory of the firm.

MWG introduces the theory of consumer behavior by presenting two distinct approaches to modeling consumer behavior, the preference-based approach (based upon unobservable preferences generating a utility function) and the choice-based approach (based upon observable choice behavior), and attempting to establish connections between the two.

What makes a good model?

Last Thursday, the Fed announced its anticipated third round of balance-sheet expansion, at a fixed rate of about $40B per month “until [substantial] improvement [in unemployment] is achieved in a context of price stability”.

Excerpts from “Retrospect and Prospect,” the concluding remarks Bob Coats presented at (or maybe wrote after) the History of Economics conference held in 1972 at Bellagio to commemorate and reassess the 1870s “marginal revolution” (full proceedings here).

How must the European institutional structure be modified to fortify the euro zone?

In Friday’s FT, former Morgan Stanley trader Douglas Keenan traces banks’ LIBOR manipulations back to 1991, when he observed, from the futures desk, LIBOR fixings come in at levels different from where he new the market to be.

“We choose this stochastic structure for computational reasons. This reduces the dimension of the variables. With (such and such) alternative, the computational burden would have dramatically increased.”

A poem seems to be an almost perfect metaphor for the modern corporate world.

Steven Shapin is visiting the UK. For those unfamiliar with the history and sociology of science, he is one of the giants of the field.