This paper proposes Pearson-type statistics based on implied probabilities to detect structural change. The class of generalized empirical likelihood estimators (see Smith (1997)) assigns a set of probabilities to each observation such that moment conditions are satisfied. These probabilities are called implied probabilities. The proposed test statistics for structural change are based on the information content in these implied probabilities. We consider cases of structural change with unknown breakpoint which can occur in the parameters of interest or in the overidentifying restrictions used to estimate these parameters. We also propose a structural change test based on implied probabilities that is robust to weak identification or cases in which parameters are completely unidentified. The test statistics considered here have good size and competitive power properties. Moreover, they are computed in a single step which eliminates the need to compute the weighting matrix required for GMM estimation.
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Paper provided by Brock University, Department of Economics in its series Working Papers with number
0904.