Methodological study demonstrates superior estimation performance in panel data, highlighting the advantages of combining refined minimum average variance estimation with local linear regression.
In this paper, we study the single-index varying-coefficient panel data model. Combining the refined minimum average variance estimation (RMAVE) method with the local linear regression, we estimate the parameters in single index and link function, and explain the steps of the iterative algorithm. Under certain regularity conditions, the asymptotic properties of the estimators of the parameters and link functions are derived. Finally, numerical simulations are presented and our model is shown to perform better than the single-index panel data model in a real-data example.
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Wang et al. (2020) studied this question.
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