An axiomatization of learning rules when counterfactuals are not observed

F Mengel, J Rivas

Research output: Contribution to journalArticlepeer-review

3 Citations (SciVal)


In this paper we study learning procedures when counterfactuals (payoffs of not chosen actions) are not observed. The decision maker reasons in two steps: First, she updates her propensities for choosing each action after every payoff experience, where propensities can be interpreted as preferences. Then, she transforms these propensities into choice probabilities. We introduce a set of axioms on how propensities are updated and on how these propensities are translated into choices and study the decision marker's behavior when such axioms are in place. Our characterization includes the linear reinforcement learning rule from Roth and Erev (1995).
Original languageEnglish
Pages (from-to)1935-1704
JournalThe B.E. Journal of Theoretical Economics
Issue number1
Publication statusPublished - 2012


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