Inattentive Economies

George-Marios Angeletos and Karthik Sastry

No 26413, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: We study the efficiency of competitive markets when people are rationally inattentive. Appropriate amendments of the Welfare Theorems hold if attention costs satisfy an invariance condition, which amounts to free disposal of decision-irrelevant aspects of the state of nature. This condition is satisfied by the Shannon mutual information formulation of attention costs. More generally, inefficiency emerges and Hayek’s (1945) argument about the informational optimality of prices fails. Markets are the best means of allocating scarce attention when agents gain nothing from directly contemplating prices rather than the entire state of nature.

JEL-codes: D5 D6 D8 E7 (search for similar items in EconPapers)
Date: 2019-10
New Economics Papers: this item is included in nep-dge and nep-mic
Note: EFG ME
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