TESTS FOR STRUCTURAL-CHANGE IN COINTEGRATED SYSTEMS

This paper considers tests for structural change of the cointegrating vector and the adjustment vector in the error correction model with an unknown change point. This paper derives new tests for structural cha nge, which are applicable to maximum likelihood estimation. Our tests for structural change of the cointegrating vector have the same nonsta ndard asymptotic distributions that have been found by Hansen (1992a, Journal of Business and Economic Statistics 10, 321-335), In contrast, the tests on the adjustment vector have the same asymptotic distribut ions that have been found by Andrews and Ploberger (1993, Econometrica 62, 1383-1414) for models with stationary variables. Asymptotic criti cal values are provided.