# heteroskedasticity

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 00:55 Sep 25, 2020
English to Portuguese translations [PRO]
Bus/Financial - Economics
Additional field(s): Business/Commerce (general), Economics, Finance (general), Investment / Securities, Mathematics & Statistics
 English term or phrase: heteroskedasticity Definition from Investopedia:In statistics, heteroskedasticity (or heteroscedasticity) happens when the standard errors of a variable, monitored over a specific amount of time, are non-constant. With heteroskedasticity, the tell-tale sign upon visual inspection of the residual errors is that they will tend to fan out over timeExample sentence(s): Most real world data will probably be heteroskedastic. However, one can still use ordinary least squares without correcting for heteroskedasticity because if the sample size is large enough, the variance of the least squares estimator may still be sufficiently small to obtain precise estimates. Methods for Detecting and Resolving... Heteroskedasticity can also occur if there are subpopulation differences or other interaction effects (e.g. the effect of income on expenditures differs for whites and blacks). (Again, the problem arises from violation of the assumption that no such differences exist or have already been incorporated into the model.) Richard Williams, Univ. of Notre Dame If heteroskedasticity does not cause bias or inconsistency in he OLS estimators, why did we introduce it as one of the Gauss-Markov assumptions? Hedibert
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Question posted on behalf of translation team:
 GBK economics and finances specialists

 Portuguese translation:heteroscedasticidade Definition:Um conjunto de variáveis aleatórias é heteroscedástico se houver sub-populações que têm diferentes variabilidades de outros.
Selected response from:

Matheus Chaud
Brazil
 4 KudoZ points were awarded for this answer

Summary of translations provided
 Matheus Chaud

## Translations offered

1 hr   confidence: peer agreement (net): +6

Definition from https://pt.qwe.wiki/wiki/Heteroscedastic:
Um conjunto de variáveis aleatórias é heteroscedástico se houver sub-populações que têm diferentes variabilidades de outros.

Example sentence(s):
• Ensaios sobre heteroscedasticidade em modelos de efeitos fixos. - UFPE

Explanation:

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Note added at 1 hr (2020-09-25 02:02:10 GMT)
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Mais de 16.000 ocorrências:
 Matheus ChaudBrazilLocal time: 05:09Native speaker of: PortuguesePRO pts in category: 32

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