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Heteroscedasticitets-robuste (HC) standardfejl

Heteroscedasticitets-robuste standardfejl er en korrektion til kovariansmatricen af en OLS-regression, der giver gyldig inferens, når fejlvariansen ikke er konstant. Introduceret af Halbert White i 1980 og forfinet til finite-sample varianterne HC1-HC4 af MacKinnon og White i 1985, ændrer de koefficientestimaterne uændret, men genopbygger standardfejlene, så t- og F-test forbliver troværdige under heteroscedasticitet.

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Kilder

  1. White, H. (1980). A Heteroskedasticity-Consistent Covariance Matrix Estimator and a Direct Test for Heteroskedasticity. Econometrica, 48(4), 817-838. DOI: 10.2307/1912934
  2. MacKinnon, J. G. & White, H. (1985). Some Heteroskedasticity-Consistent Covariance Matrix Estimators with Improved Finite Sample Properties. Journal of Econometrics, 29(3), 305-325. DOI: 10.1016/0304-4076(85)90158-7

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ScholarGate. (2026, June 1). Heteroscedasticity-Consistent (HC) Standard Errors. ScholarGate. https://scholargate.app/da/statistics/heteroscedasticity-robust-se

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ScholarGateHeteroscedasticity-Robust Standard Errors (Heteroscedasticity-Consistent (HC) Standard Errors). Hentet 2026-06-15 fra https://scholargate.app/da/statistics/heteroscedasticity-robust-se · Datasæt: https://doi.org/10.5281/zenodo.20539026