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How Do the Elderly Form Expectations?

其他書名	An Analysis of Responses to New Information
出版	National Bureau of Economic Research, 1988
URL	http://books.google.com.hk/books?id=nbAiAQAAMAAJ&hl=&source=gbs_api

註釋In this paper, I outline and test a simple theory that describes the evolution of expectations concerning social security benefits during the pre-retirement period. After correcting for the presences of measurement error, I obtain results that are consistent with this theory: expectations appear to evolve as a random walk, and innovations in this process are unrelated to previously available information. I also estimate responses of expectations to the arrival of new information. Although previous research indicates that individuals do not form expectations on the basis of all available information (and in particular ignore much of the information contained in concurrent statutory entitlements to social security benefits), responses to new information during the period immediately preceding retirement appear to be highly rational. The bulk of information affects the evolution of expectations only through its impact on actual benefit calculations. Furthermore, the data support the view that individuals form accurate assessments of the ultimate impact of new information on actual benefits.