Expectation formation and regime switches |
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Authors: | Otwin Becker Johannes Leitner Ulrike Leopold-Wildburger |
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Institution: | 1. Department of Statistics and Operations Research, Karl Franzens University, Universit?tsstrasse 15/E3, 8010, Graz, Austria
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Abstract: | Economic agents often have to make decisions in environments affected by regime switches but expectation formation has hardly
been explored in this context. We report about a laboratory experiment whose participants judgmentally forecast three time
series subject to regime switches. The participants make forecasts without context knowledge and without support from statistical
software. Their forecasts are only based on the previous realizations of the time series. Our interest is the explanation
of the average forecasts with a simple model, the bounds & likelihood heuristic. In previous studies it was shown that this
model can explain average forecasting behavior very well given stable and stationary time series. We find that the forecasts
after a structural break are characterized by a higher variance and less accuracy over several periods. Considering this transition
phase in the model, the heuristic performs even slightly better than the Rational Expectations Hypothesis. |
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