השוואת שיטות

	מודל רובסטי עם אינפלציית אפסים	רגרסיה רובסטית
תחום	סטטיסטיקה	סטטיסטיקה
משפחה	Regression model	Regression model
שנת המקור	1990s–2000s	1964
הוגה השיטה	Extension of Lambert (1992) ZIP model combined with robust M-estimation and sandwich standard errors	Peter J. Huber (M-estimation, 1964); Frank Hampel (influence function, 1974)
סוג	Robust count regression with excess zeros	Regression with outlier resistance
מקור מכונן	Zeileis, A., Kleiber, C., & Jackman, S. (2008). Regression models for count data in R. Journal of Statistical Software, 27(8), 1–25.	Huber, P. J. (1964). Robust estimation of a location parameter. The Annals of Mathematical Statistics, 35(1), 73–101.
כינויים	robust ZIP, robust ZINB, outlier-resistant zero-inflated regression, robust zero-inflated Poisson	M-estimation regression, robust linear regression, outlier-resistant regression, MM-estimation
קשורות	5	6
תקציר	The robust zero-inflated model extends standard zero-inflated count regression — which handles excess zeros via a mixture of a point mass at zero and a count distribution — by replacing or supplementing classical maximum likelihood with robust estimation techniques (M-estimators, sandwich standard errors) that protect against the distorting influence of outlying observations.	Robust regression estimates the linear relationship between a continuous outcome and predictors while sharply reducing the influence of outliers and leverage points. Unlike OLS, which is highly sensitive to extreme observations, robust methods assign down-weighted influence to atypical data points, producing coefficient estimates that remain stable even when a fraction of the data is contaminated or non-normally distributed.