After analyzing portfolio differences between separate account‐mutual fund twins, we find that dissimilar “fraternal twins” show significantly lower joint performance than “identical twins.” This finding is consistent with fraternal twins competing for the limited attention of a...

Previous research has suggested that information processing and hierarchy costs play a role in firm-level diseconomies of scale. Using separate accounts (SAs) as a laboratory, we examine if these costs vary across investment style (quantitative vs. fundamental) and what role, if any, they play...

After analyzing portfolio differences between separate account-mutual fund twins, we find that dissimilar “fraternal twins” show significantly lower joint performance than “identical twins.” This finding is consistent with fraternal twins competing for the limited attention of a manager...