A number of authors have attempted to test whether the US economy is in a determinate or an indeterminate equilibrium. We argue that to answer this question, one must impose a priori restrictions on lag length that cannot be tested. We provide examples of two economic models. Model 1 displays an indeterminate equilibrium, driven by sunspots. Model 2 displays a determinate equilibrium driven by fundamentals. Both models have the same likelihood function and are therefore observationally equivalent.
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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number
4101.
Find related papers by JEL classification: C62 - Mathematical and Quantitative Methods - - Mathematical Methods and Programming - - - Existence and Stability Conditions of Equilibrium D51 - Microeconomics - - General Equilibrium and Disequilibrium - - - Exchange and Production Economies
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