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THE AD-AS MODEL AND ITS SOLUTIONS: SOME NEW RESULTS IN A DISEQUILIBRIUM PERSPECTIVE*
Authors:ALESSANDRA CHIRCO  CATERINA COLOMBO
Institution:of Bologna;University of Ferrara
Abstract:This paper discusses the logical foundation and the solutions of a microfounded aggregate demand … aggregate supply model under the disequilibrium hypothesis. We first show that a) the latter hypothesis is the only one ensuring model consistent expectations and that b) price predetermination, more than price flexibility, should be embodied in an AD-AS framework. Then we develop a full AD-AS scheme, both under excess supply and excess demand for labour. We prove that in the latter case no well defined equilibrium exists. Finally, we discuss stability and perform some comparative statics exercises.
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