Jagannathan, Ravi; Ma, Tongshu - In: Journal of Finance 58 (2003) 4, pp. 1651-1684
Green and Hollifield (1992) argue that the presence of a dominant factor would result in extreme negative weights in mean-variance efficient portfolios even in the absence of estimation errors. In that case, imposing no-short-sale constraints should hurt, whereas empirical evidence is often to...