The Qualitative Expectations Hypothesis: Model Ambiguity, Consistent Representations Of Market Forecasts, And Sentiment
We introduce the Qualitative Expectations Hypothesis (QEH) as a new approach to modeling macroeconomic and ?nancial outcomes. Building on John Muth?s seminal insight underpinning the Rational Expectations Hypothesis (REH), QEH represents the market?s forecasts to be consistent with the predictions of an economist?s model. However, by assuming that outcomes lie within stochastic intervals, QEH, unlike REH, recognizes the ambiguity faced by an economist and market participants alike. Moreover, QEH leaves the model open to ambiguity by not specifying a mechanism determining speci?c values that outcomes take within these intervals. In order to examine a QEH model?s empirical relevance, we formulate and estimate its statistical analog based on simulated data. We show that the proposed statistical model adequately represents an illustrative sample from the QEH model. We also illustrate how estimates of the statistical model?s parameters can be used to assess the QEH model?s qualitative implications.
|Date of creation:||22 Apr 2017|
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