Motivated by the unprecedented availability of consumer information on the Internet, we characterize the winners and losers from potential privacy regulation in the context of four commonly-used oligopoly models: a linear city model, a circular city model, a vertical differentiation model, and a...

A model of an exclusive group or class whose membership is governed by personal contact and interaction is studied. Members of this old-boy network attempt to shield themselves from transacting with opportunistic or incompetent individuals by dealing only infrequently with unproven nonmembers....