Em busca dos bens de Giffen

Olha o abstract....
Economists have long searched, unsuccessfully, for convincing evidence of a Giffen behavior, i.e., consumers who, under some circumstances, respond to an increase in the price of a good by demanding more of it. We examine several theoretical approaches to the Giffen phenomenon and show that in each case Giffen behavior is closely associated with consumers reacting to an increase in the price of a staple by consuming more of that good in order to maintain subsistence consumption. We then use detailed, individual-level panel data from China to demonstrate the existence of two Giffen goods. In particular, in the south, rice, the preferred dietary staple, is a Giffen good for poor consumers. On the other hand, in the north, noodles play a larger role in diet than rice, and demand for noodles is shown to be Giffen