Comparar métodos

	Regressão Robusta Bayesiana	Regressão Robusta
Área	Estatística	Estatística
Família	Regression model	Regression model
Ano de origem	1993	1964
Autor original	Geweke (1993); Gelman et al. (2013)	Peter J. Huber (M-estimation, 1964); Frank Hampel (influence function, 1974)
Tipo	Bayesian regression with heavy-tailed errors	Regression with outlier resistance
Fonte seminal	Geweke, J. (1993). Bayesian treatment of the independent Student-t linear model. Journal of Applied Econometrics, 8(S1), S19–S40.	Huber, P. J. (1964). Robust estimation of a location parameter. The Annals of Mathematical Statistics, 35(1), 73–101.
Outros nomes	Bayesian heavy-tailed regression, Bayesian Student-t regression, robust Bayesian linear model, BRR	M-estimation regression, robust linear regression, outlier-resistant regression, MM-estimation
Relacionados	6	6
Resumo	Bayesian Robust Regression replaces the Gaussian error assumption of ordinary linear regression with a heavy-tailed distribution — most commonly the Student-t — and estimates all parameters in a Bayesian framework. The heavier tails give outliers less influence on the fitted line, yielding stable coefficient estimates and honest uncertainty intervals even when the data contain unusual 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.