The purpose of this paper is to suggest simple procedures designed to cope with the effects of thin trading on event study tests. The procedures are directed at two central problems: (i) missing individual stock returns (i.e., days on which no trading is observed in a security), and (ii) the...

This paper examines the profitability of insider trading. The authors examine insider trading on the Vancouver Stock Exchange where it might be argued that there are larg e informational asymmetries. Besides the traditional "event study" approach, they develop portfolio performance measures for...

This paper explores the effect of exclusionary ethical investing on corporate behavior in a risk-averse, equilibrium setting. While arguments exist that ethical investing can influence a firm's cost of capital, and so affect investment, no equilibrium model has been presented to do so. We show...

We model a market in which some investors get utility from owning shares of firms that engage in corporate social responsibility (CSR). In equilibrium, investors' CSR considerations influence portfolio choices, stock prices, and CSR spending. We study tax policy designed to maximize total giving...