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Estimation of Variances in the Grouped Heteroskedasticity Model


  • Binkley, James K


Error variances for weighted least squares estimation of the grouped heteroskedasticity model can be estimated using residuals from individual group regressions or one pooled regression. The latter is more troublesome, but is usually considered more efficient because the common coefficient vector is imposed on the first stage. However, the variances are biased. Monte Carlo results show this to be an important consideration when heteroskedasticity is strong. Then residuals from separate regressions lead to more efficient weighted least squares estimates. Furthermore, efficiency gains from the pooled method, even when iterated, seldom, if ever, appear to be of large consequence. Copyright 1989 by MIT Press.

Suggested Citation

  • Binkley, James K, 1989. "Estimation of Variances in the Grouped Heteroskedasticity Model," The Review of Economics and Statistics, MIT Press, vol. 71(4), pages 659-665, November.
  • Handle: RePEc:tpr:restat:v:71:y:1989:i:4:p:659-65

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    Cited by:

    1. Antoine Magnier & Joël Toujas-Bernate, 1994. "Technology and trade: Empirical evidences for the major five industrialized countries," Review of World Economics (Weltwirtschaftliches Archiv), Springer;Institut für Weltwirtschaft (Kiel Institute for the World Economy), vol. 130(3), pages 494-520, September.

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