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Selection of Optimal Lag Length in Cointegrated VAR Models with Weak Form of Common Cyclical Features

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  • Carlos Enrique Carrasco Gutiérrez
  • Reinaldo Castro Souza
  • Osmani Teixeira de Carvalho Guillén

Abstract

An important aspect of empirical research based on the vector autoregressive (VAR) model is the choice of the lag order, since all inference in the VAR model depends on the correct model specification. Literature has shown important studies of how to select the lag order of a nonstationary VAR model subject to cointegration restrictions. In this work, we consider an additional weak form (WF) restriction of common cyclical features in the model in order to analyze the appropriate way to select the correct lag order. Two methodologies have been used: the traditional information criteria (AIC, HQ and SC) and an alternative criterion (IC(p,s)) which select simultaneously the lag order p and the rank structure s due to the WF restriction. A Monte-Carlo simulation is used in the analysis. The results indicate that the cost of ignoring additional WF restrictions in vector autoregressive modeling can be high, especially when SC criterion is used.

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Bibliographic Info

Paper provided by Central Bank of Brazil, Research Department in its series Working Papers Series with number 139.

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Date of creation: Jun 2007
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Handle: RePEc:bcb:wpaper:139

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