We use a novel field experiment which jointly tests two implicit assumptions of updating models in a joint framework: that new information leads to new knowledge and that new knowledge can affect economic decisions. In the experiment, we elicit subjects\u2019 prior knowledge state about a good\u2019s attributes, exogenously vary how much new information about good attributes we provide to subjects, elicit subjects\u2019 valuation for the good, and elicit posterior knowledge states about the same good attributes. Testing for changes in knowledge jointly with changes in preferences allows us to horserace updating models more completely than previous studies since we observe ex ante and ex post knowledge states. Our results are consistent with a model of incomplete learning, fatigue and either confirmation bias or costly search coupled with unbiased priors.<\/p>\n","protected":false},"excerpt":{"rendered":"
We use a novel field experiment which jointly tests two implicit assumptions of updating models in a joint framework: that new information leads to new knowledge and that new knowledge can affect economic decisions. In the experiment, we elicit subjects\u2019 prior knowledge state about a good\u2019s attributes, exogenously vary how much new information about good 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