Cabrales, AntonioGossner, OlivierSerrano, RobertoUniversidad Carlos III de Madrid. Departamento de Economía2012-09-182012-09-182012-092340-5031https://hdl.handle.net/10016/15388An information transaction entails the purchase of information. Formally, it consists of an information structure together with a price. We develop an index of the appeal of information transactions, which is derived as a dual to the agent’s preferences for information. The index of information transactions has a simple analytic characterization in terms of the relative entropy from priors to posteriors, and it also connects naturally with a recent index of riskiness.application/pdfengAtribución-NoComercial-SinDerivadas 3.0 EspañaInformativenessInformation transactionsKullback-Leibler divergenceRelative entropyDecision under uncertaintyInvestmentBlackwell orderingworking paperC00C43D00D80D81G00G11Economíaopen accessDT/0000000829we1224