A New Keynesian model with heterogeneous expectations

William A. Branch and Bruce McGough

Journal of Economic Dynamics and Control, 2009, vol. 33, issue 5, pages 1036-1051

Abstract: Within a New Keynesian model, we incorporate bounded rationality at the individual agent level, and we determine restrictions on expectations operators sufficient to imply aggregate IS and AS relations of the same functional form as those under rationality. This result provides dual implications: the strong nature of the restrictions required to achieve aggregation serve as a caution to researchers--imposing heterogeneous expectations at an aggregate level may be ill-advised; on the other hand, accepting the necessary restrictions provides for tractable analysis of expectations heterogeneity. As an example, we consider a case where a fraction of agents are rational and the remainder are adaptive, and find specifications that are determinate under rationality may possess multiple equilibria in case of expectations heterogeneity.

Keywords: Heterogeneous; expectations; Monetary; policy; Adaptive; learning; Aggregation (search for similar items in EconPapers)
Date: 2009
View citations in EconPapers

Downloads: (external link)
http://www.sciencedirect.com/science/article/B6V85 ... 40bda114bc5e24aeafa8
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: http://EconPapers.repec.org/RePEc:eee:dyncon:v:33:y:2009:i:5:p:1036-1051

Access Statistics for this article

Journal of Economic Dynamics and Control is edited by J. Bullard, C. Chiarella, C. H. Hommes, P. N. Ireland, T. Cogley and M. Juillard

More articles in Journal of Economic Dynamics and Control from Elsevier
Series data maintained by Heidi Boesdal ().