Σύγκριση μεθόδων

	Συνορθωμένοι Τυπικοί Σφάλματα (HC) Ανθεκτικοί στην Ετεροσκεδαστικότητα	Wild Bootstrap για Συμπερασματολογία σε Παλινδρόμηση
Πεδίο	Στατιστική	Στατιστική
Οικογένεια	Regression model	Regression model
Έτος προέλευσης	1980	1986
Δημιουργός	Eicker; Huber; White (1980); MacKinnon & White (1985)	Wu (1986); refined by Davidson & Flachaire (2008)
Τύπος	Robust covariance estimator for linear regression	Resampling-based regression inference
Θεμελιώδης πηγή	White, H. (1980). A Heteroskedasticity-Consistent Covariance Matrix Estimator and a Direct Test for Heteroskedasticity. Econometrica, 48(4), 817-838.	Wu, C. F. J. (1986). Jackknife, Bootstrap and Other Resampling Methods in Regression Analysis. Annals of Statistics, 14(4), 1261-1295.
Εναλλακτικές ονομασίες	robust standard errors, White standard errors, Huber-Eicker-White standard errors, sandwich standard errors	wild bootstrap, wild cluster bootstrap, Wu-Liu resampling, Wild Bootstrap
Συναφείς	5	5
Σύνοψη	Heteroscedasticity-robust standard errors are a correction to the covariance matrix of an OLS regression that yields valid inference when the error variance is not constant. Introduced by Halbert White in 1980 and refined into the finite-sample variants HC1-HC4 by MacKinnon and White in 1985, they leave the coefficient estimates unchanged but rebuild the standard errors so that t and F tests remain trustworthy under heteroscedasticity.	The wild bootstrap is a resampling method for regression models with heteroscedastic errors, introduced by Wu (1986) and refined by Davidson and Flachaire (2008). It builds a bootstrap distribution by rescaling each fitted residual with a random sign, so that standard errors and confidence intervals stay valid when the error variance is not constant or the data are clustered.