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Working Paper
An inquiry into the existence and uniqueness of equilibrium with state-dependent pricing
State-dependent pricing models are now an operational framework for quantitative business cycle analysis. The analysis in Ball and Romer [1991], however, suggests that such models may be rife with multiple equilibria: in their static model price adjustment is always characterized by complementarity, a necessary condition for multiplicity. We study existence and uniqueness of equilibrium in a discrete-time state-dependent pricing model. In steady states of our model, we find only weak complementarity and no evidence of multiplicity. We likewise find no evidence of multiplicity in the presence ...
Report
Language, learning, and location
Language is a fundamental tool for communication of ideas between people, and so is an essential input into production and trade. In general, a society will possess more production and consumption opportunities when all its members share a common language. Neighboring societies and communities likewise have a strong incentive to utilize a common language, and indeed there are countless examples of language assimilation, especially in the last one hundred years. Hence, it is puzzling that more assimilation has not occurred. History has recorded numerous examples of communities that coexist ...