摘要: This paper provides a model of expectations formation with relatively general linear structure from which various standard models emerge as special cases. By concentrating on agents' information acquisition rather than their parameter estimation, the author obtains rational forecasting is consistent wider variety responses to new are most commonly-used hypotheses. After describing model, several potential extensions and conditions under hypotheses emerge, he considers testable restrictions lead some simplification while continuing allow more information. Copyright 1988 by Royal Economic Society.