This paper is a panel data study on the behavior of prices and margins of oligopolies involved in repeated games. The authors examine two supergame models which generate very different predictions about the cyclical behavior of prices and margins. Evidence on the levels of price-cost margins...

Previous studies of insider trading have examined the profitability to executives of their stock trading with a view to evaluating the informational efficiency of securities markets. The authors examine empirically whether insider trading raises or lowers firm value. To correctly identify the...