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Testing increasing dispersion

Author

Listed:
  • Härdle, Wolfgang
  • Park, Byeong

Abstract

Increasing dispersion in regression analysis means that with positive changes of the explanatory variable the residual variance increases. Motivated by theoretical questions in stability of demand systems we consider the question of increasing dispersion in a nonparameteric way. It amounts to testing the positive definiteness of differences of covariance matrices. The asymptotic distribution of the smallest eigenvalue of this difference is rather complicated that is why we also apply bootstrapping. The proposed method is applied to family expenditure data from the United Kingdom.
(This abstract was borrowed from another version of this item.)
(This abstract was borrowed from another version of this item.)

Suggested Citation

  • Härdle, Wolfgang & Park, Byeong, 1994. "Testing increasing dispersion," SFB 373 Discussion Papers 1994,2, Humboldt University of Berlin, Interdisciplinary Research Project 373: Quantification and Simulation of Economic Processes.
    • Handle: RePEc:zbw:sfb373:19942
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    JEL classification:

    • G35 - Financial Economics - - Corporate Finance and Governance - - - Payout Policy
    • G20 - Financial Economics - - Financial Institutions and Services - - - General

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