Abstract
Abstract We reconsider the costs to international equity investments implied by standard portfolio theory (Cooper and Kaplanis, 1994; Sercu and Vanpee, 2008). Estimated costs are mostly driven by risk estimates, not by asset holdings. For OECD markets, risks are fairly stable and relatively easy to estimate, but for emerging markets this is not the case. Many required expected returns implied by unconditional risk estimates defy credibility, both a priori and empirically. More sophisticated volatility estimates based on a dynamic risk model a la Bekaert and Harvey (1997) lead to implicit costs that are far more credible, but the results remain fragile.
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