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This paper develops a method for testing for the presence of a single structural break in panel data models with unobserved heterogeneity represented by a factor error structure. The common factor approach is an appealing way to capture the effect of unobserved variables, such as skills and...
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estimated using Generalised Method of Moments (GMM). These include standard asymptotic Wald tests based on one-step and two …-step GMM estimators; two bootstrapped versions of these Wald tests; a version of the two-step Wald test that uses a finite … sample corrected estimate of the variance of the two-step GMM estimator; the LM test; and three criterion-based tests that …
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which coincide with known generalised method of moments (GMM estimators for models where stationarity is not imposed on the …
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