This paper examines the propensity of firms to comove in investment decisions. Although stock return comovement and herding among investors received considerable attention in existing work, little is known about correlated investment behavior of firms. After controlling for the similarity of...

"This paper investigates the dynamics of individual portfolios in a unique dataset containing the disaggregated wealth of all households in Sweden. Between 1999 and 2002, we observe little aggregate rebalancing in the financial portfolio of participants. These patterns conceal strong...

This paper investigates the efficiency of household investment decisions in a unique dataset containing the disaggregated wealth and income of the entire population of Sweden. The analysis focuses on two main sources of inefficiency in the financial portfolio: underdiversification of risky...