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Asymptotic Properties of Quasi-Maximum Likelihood Estimators and Test Statistics

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  • Thomas E. MaCurdy
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    Abstract

    We examine the implications of arbitrage in a market with many assets. The absence of arbitrage opportunities implies that the linear functionals that give the mean and cost of a portfolio are continuous; hence there exist unique portfolios that represent these functionals. The mean variance efficient set is a cone generated by these portfolios. Ross [16, 18J showed that if there is a factor structure, then the distance between the vector or mean returns and the space spanned by the factor loadings is bounded as the number of assets increases. We show that if the covariance matrix of asset returns has only K unbounded eigenvalues, then the corresponding K eigenvectors converge and play the role of factor loadings in Ross' result. Hence only a principal components analysis is needed to test the arbitrage pricing theory. Our eigenvalue conditional can hold even though conventional measures of the approximation error in a K factor model are unbounded. We also resolve the question of when a market with many assets permits so much diversification that risk-free investment opportunities are available.

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    Bibliographic Info

    Paper provided by National Bureau of Economic Research, Inc in its series NBER Technical Working Papers with number 0014.

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    Date of creation: Jun 1981
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    Handle: RePEc:nbr:nberte:0014

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    1. Amemiya, Takeshi, 1973. "Regression Analysis when the Dependent Variable is Truncated Normal," Econometrica, Econometric Society, Econometric Society, vol. 41(6), pages 997-1016, November.
    2. White, Halbert, 1980. "Nonlinear Regression on Cross-Section Data," Econometrica, Econometric Society, Econometric Society, vol. 48(3), pages 721-46, April.
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    Cited by:
    1. Zvi Griliches & Bronwyn H. Hall & Ariel Pakes, 1988. "R&D, Patents, and Market Value Revisited: Is There Evidence of A SecondTechnological Opportunity Related Factor?," NBER Working Papers 2624, National Bureau of Economic Research, Inc.
    2. Hugo Kruiniger, 2002. "On the estimation of panel regression models with fixed effects," 10th International Conference on Panel Data, Berlin, July 5-6, 2002, International Conferences on Panel Data C6-2, International Conferences on Panel Data.
    3. Jongmoo Choi & Elyas Elyasiani, 1997. "Derivative Exposure and the Interest Rate and Exchange Rate Risks of U.S. Banks," Journal of Financial Services Research, Springer, Springer, vol. 12(2), pages 267-286, October.
    4. Jongmoo Jay Choi & Elyas Elyasiani, 1996. "Derivative Exposure and the Interest Rate and Exchange Rate Risks of U.S. Banks," Center for Financial Institutions Working Papers, Wharton School Center for Financial Institutions, University of Pennsylvania 96-53, Wharton School Center for Financial Institutions, University of Pennsylvania.
    5. Choi, Jongmoo Jay & Jiang, Cao, 2009. "Does multinationality matter? Implications of operational hedging for the exchange risk exposure," Journal of Banking & Finance, Elsevier, Elsevier, vol. 33(11), pages 1973-1982, November.
    6. Emma Tominey, 2010. "The Timing of Parental Income and Child Outcomes: The Role of Permanent and Transitory Shocks," CEE Discussion Papers, Centre for the Economics of Education, LSE 0120, Centre for the Economics of Education, LSE.

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