Abstract
This study is concerned with an examination of the finite sample behaviour of several limited information estimators in interdependent structures with error terms related over time and in certain specifications across equations. The Monte Carlo or simulation approach is adopted and applied to computationally manageable structures containing lagged dependent variables. The analysis of the Monte Carlo experiments is formulated in terms of estimating response functions, the dependent variables of which are the first two moments of target model estimators. In addition to the impact of simultaneity, autocorrelation and lagged dependent variables on the estimators, evidence is also accumulated on the small sample effects of misspecification in terms of the faulty inclusion and deletion of regressors. The results of the experiments revealed the substantial impact which autocorrelation can have on ordinary least squares (OLS) and two-stage least squares (2SLS) in terms of efficiency loss. Averaging over all the coefficients in the models, estimators which take account of both autocorrelation and simultaneity had a relative efficiency factor of about 1.5 to 1.9. Many of the parameters in the Monte Carlo model (including misspecification errors, multicollinearity) had qualitatively the same effect on bias and dispersion properties of the estimators.
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This paper is based on the author's doctoral dissertation at Queen's University, Kingston 1977. The author wishes to thank Charles Beach, Hiroki Tsurumi, and Gordon Fisher for comments and suggestions.
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Robertson, M. The small sample properties of several limited information estimators in interdependent structures with scalar and vector autoregressive errors. Empirical Economics 7, 63–73 (1982). https://doi.org/10.1007/BF02506825
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DOI: https://doi.org/10.1007/BF02506825