heteroscedasticity

(redirected from Heteroscadicity)

het·er·o·sced·as·tic·i·ty

(het'ĕr-ō-skĕd'as-tis'ĭ-tē),
Nonconstancy of the variance of a measure over the levels of the factor under study.
[hetero + G. skedastikos, pertaining to scattering, fr. skedannumi, to scatter]

heteroscedasticity

an irregular scattering of values in a series of distributions; accompanied by a comparable scatter of variances.
References in periodicals archive ?
16) Variation of the number of studied agglomerations for each time period is explainable by the fact that all regression models have been realised using 1) a test of variation of inflation or VIF test with no results superior to four (under the acceptable threshold of 10), 2) a graphic analysis of dispersion diagrams to verify the interval of confidence or heteroscadicity and 3) a Cook's D test with a threshold of 3/n, causing the dismissal of several agglomerations at each regression.
Since the study applies the cross section and pooled estimation approaches, therefore, the occurrence of heteroscadicity, multicollinearity and autocorrelation is possible.
The heteroscadicity is the problem of cross sectional data and it will weaken the reliability of the results therefore we have used the Generalised Least Sqaure (GLS) method, also known as FGLS in the literature, to estimate the gravity model for the South Asian countries.