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Material Type: | Document, Internet resource |
---|---|
Document Type: | Internet Resource, Computer File |
All Authors / Contributors: |
Benjamin Hebert; Michael Woodford; National Bureau of Economic Research, |
OCLC Number: | 1125341871 |
Notes: | "October 2019" Includes online appendix (pages 45-95). |
Description: | 1 online resource (44 pages) : illustrations. |
Series Title: | Working paper series (National Bureau of Economic Research), no. 26415. |
Responsibility: | Benjamin M. Hébert, Michael Woodford. |
Abstract:
Decisions take time, and the time taken to reach a decision is likely to be informative about the cost of more precise judgments. We formalize this insight in the context of a dynamic rational inattention (RI) model. Under standard conditions on the flow cost of information in our discrete-time model, we obtain a tractable model in the continuous-time limit. We next provide conditions under which the resulting belief dynamics resemble either diffusion processes or processes with large jumps. We then demonstrate that the state-contingent choice probabilities predicted by our model are identical to those predicted by a static RI model, providing a micro-foundation for such models. In the diffusion case, our model provides a normative foundation for a variant of the DDM models studied in mathematical psychology.
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