"Go wild for a while!": A new asymptotically Normal test for forecast evaluation in nested models

Pablo Pincheira, Nicolás Hardy and Felipe Muñoz

MPRA Paper from University Library of Munich, Germany

Abstract: In this paper we present a new asymptotically normal test for out-of-sample evaluation in nested models. Our approach is a simple modification of a traditional encompassing test that is commonly known as Clark and West test (CW). The key point of our strategy is to introduce an independent random variable that prevents the traditional CW test from becoming degenerate under the null hypothesis of equal predictive ability. Using the approach developed by West (1996), we show that in our test the impact of parameter estimation uncertainty vanishes asymptotically. Using a variety of Monte Carlo simulations in iterated multi-step-ahead forecasts we evaluate our test and CW in terms of size and power. These simulations reveal that our approach is reasonably well-sized even at long horizons when CW may present severe size distortions. In terms of power, results are mixed but CW has an edge over our approach. Finally, we illustrate the use of our test with an empirical application in the context of the commodity currencies literature.

Keywords: forecasting; random walk; out-of-sample; prediction; mean square prediction error (search for similar items in EconPapers)
JEL-codes: C01 C1 C12 G17 (search for similar items in EconPapers)
Date: 2021-01
New Economics Papers: this item is included in nep-ecm, nep-ets and nep-for
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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