Search theory has provided a simple and robust laboratory that economic theorists have used to examine a wide variety of questions about the acquisition of information. Early work on search modeled an individual's searching decisions and drew inferences about the value of information and the...

In this paper, we define dynamic and static factors and distinguish between the dynamic and static structure of asset excess returns. We examine the value-weighted market portfolio as a dynamic factor and propose an intuitively appealing procedure to search for more dynamic factors. We find...