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Bad Beta, Good Beta

By John Y. Campbell and Tuomo Vuolteenaho

òòò½Íø Review, December 2004

This paper explains the size and value "anomalies" in stock returns using an economically motivated two-beta model. We break the beta of a stock with the market portfolio into two components, one reflecting news about the market's future cash flows and on...

When Does Learning in Games Generate Convergence to Nash Equilibria? The Role of Supermodularity in an Experimental Setting

By Yan Chen and Robert Gazzale

òòò½Íø Review, December 2004

This study clarifies the conditions under which learning in games produces convergence to Nash equilibria in practice. We experimentally investigate the role of supermodularity, which is closely related to the more familiar concept of strategic complement...