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heteroskedasticity

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00:54 Sep 25, 2020
English to Catalan 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 time

Example 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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Summary of translations provided
5Heteroscedasticitat
Miquel Gomez Besos


  

Translations offered


2 days 8 hrs   confidence: Answerer confidence 5/5
Heteroscedasticitat


Definition from Universitat de Barcelona:
És una paraula molt complicada que defineix una idea simple: defineix la situació en la qual una variable aleatòria no manté una variància constant.

Example sentence(s):
  • EXEMPLE 6. 7. Contrastos d'heteroscedasticitat en el model doblement logarítmic per explicar el valor de mercat dels bancs espanyols (Cont.) - Universitat de València  
  • Els fets han demostrat que els problemes econòmics reals sovint es produeixen heterocedasticitat, el que afectarà a l'estimació del model revisió, proves i aplicacions. Per tant, en l'establiment de models economètrics ha de ser provat si hi ha model de heteroscedasticitat. Sobre el mètode de prova de heteroscedasticitat és el següent: Icona de la Llei d'Inspecció, Goldfeld - mètode d'assaig Quandt, Llei d'Inspecció Blanc, test Park i la Llei d'Inspecció Gleiser. - Swewe  
Miquel Gomez Besos
Indonesia
Local time: 16:34
Native speaker of: Native in CatalanCatalan, Native in SpanishSpanish
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