Compara mètodes

	Estadístic Gi* robust de Getis-Ord	Autocorrelació espacial robusta
Camp	Anàlisi espacial	Anàlisi espacial
Família	Regression model	Regression model
Any d'origen	1992 (base); robust variants circa 2000s–2010s	1981–1995
Autor original	Getis & Ord (base statistic); robust extensions developed in subsequent spatial statistics literature	Cliff & Ord; extended by Anselin and colleagues
Tipus	Local spatial statistic	Spatial dependence test (robust variant)
Font seminal	Getis, A., & Ord, J. K. (1992). The analysis of spatial association by use of distance statistics. Geographical Analysis, 24(3), 189–206.	Anselin, L., & Florax, R. J. G. M. (1995). Small sample properties of tests for spatial dependence in regression models: some further results. In Anselin, L. & Florax, R. J. G. M. (Eds.), New Directions in Spatial Econometrics. Springer, Berlin.
Àlies	Robust Gi*, Robust local Gi star, outlier-resistant hot spot analysis, robust local spatial autocorrelation Gi*	robust Moran's I, robust spatial dependence test, outlier-resistant spatial autocorrelation, RSA
Relacionats	5	5
Resum	The Robust Getis-Ord Gi* statistic extends the classical Gi* hot-spot measure to handle outliers in spatial data. By using robust estimators of the mean and variance — such as trimmed means, medians, or down-weighted influential observations — it identifies statistically significant spatial clusters of high or low values even when the attribute distribution contains extreme values that would distort the standard Gi*.	Robust spatial autocorrelation methods measure the degree to which nearby geographic units share similar values, while explicitly controlling for the distorting influence of spatial outliers and extreme observations. They extend classical statistics such as Moran's I by down-weighting or trimming observations that would otherwise inflate or deflate the autocorrelation signal.