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Heteroskedasticity-robust standard errors for fixed effects panel data regression
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DOI：10.1111/j.0012-9682.2008.00821.x.png)
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Abstract
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The conventional heteroskedasticity-robust (HR) variance matrix estimator for cross-sectional regression (with or without a degrees-of-freedom adjustment), applied to the fixed-effects estimator for panel data with serially uncorrelated errors, is inconsistent if the number of time periods T is fixed (and greater than 2) as the number of entities n increases. We provide a bias-adjusted HR estimator that is root nT-consistent under any sequences (n, T) in which n and/or T increase to infinity. This estimator can be extended to handle serial correlation of fixed order.
Keywords:
white standard errors
longitudinal data
clustered standard errors
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