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Testing for Mean‐Variance Spanning with Short Sales Constraints and Transaction Costs: The Case of Emerging Markets

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  • Frans A. De Roon
  • Theo E. Nijman
  • Bas J. M. Werker

Abstract

We propose regression‐based tests for mean‐variance spanning in the case where investors face market frictions such as short sales constraints and transaction costs. We test whether U.S. investors can extend their efficient set by investing in emerging markets when accounting for such frictions. For the period after the major liberalizations in the emerging markets, we find strong evidence for diversification benefits when market frictions are excluded, but this evidence disappears when investors face short sales constraints or small transaction costs. Although simulations suggest that there is a possible small‐sample bias, this bias appears to be too small to affect our conclusions.

Suggested Citation

  • Frans A. De Roon & Theo E. Nijman & Bas J. M. Werker, 2001. "Testing for Mean‐Variance Spanning with Short Sales Constraints and Transaction Costs: The Case of Emerging Markets," Journal of Finance, American Finance Association, vol. 56(2), pages 721-742, April.
  • Handle: RePEc:bla:jfinan:v:56:y:2001:i:2:p:721-742
    DOI: 10.1111/0022-1082.00343
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