Spanning Tests in Return and Stochastic Discount Factor Mean Variance Frontiers: A Unifying Approach
67 Pages Posted: 6 Jul 2004
Date Written: June 2004
Abstract
We propose new approaches to test for spanning in the return and stochastic discount factor mean-variance frontiers, which assess if either the centered or uncentered mean and cost representing portfolios are shared by the initial and extended sets of assets. We show that our proposed tests are asymptotically equivalent to the existing spanning tests under the null and sequences of local alternatives, and analyze their asymptotic relative efficiency. We also extend the theory of optimal GMM inference to deal with the singularities that arise in some spanning tests. Finally, we include an empirical application to money markets in Europe.
Keywords: Asset pricing, asymptotic slopes, GMM, representing portfolios, singular covariance, matrix
JEL Classification: C12, C13, G11, G12
Suggested Citation: Suggested Citation
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