In this paper we use the BDS test developed by Brock-Dechert-Scheinkman (1987) to investigate whether ARMA Models for the US real GNP generate i.i.d. residuals. The second step,after reviewing some results from Brock-Sayer (1988) and Scheinkman-LeBaron (1989), SL, we will use a different kind of specifications for the US real GNP such as a model with different volatility pre and post World War II as in SL (1989), and a threshold autoregressive specification as in Potter (1990). The last point consists of analysing a modified threshold model that takes into account the observation made by SL (1989) and next we evaluate the forecast performance of the "best" models among those examined.
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Find related papers by JEL classification: F3 - International Economics - - International Finance F4 - International Economics - - Macroeconomic Aspects of International Trade and Finance
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