The importance of performance in the strategy literature is widely accepted among scholars and practitioners. However, the proxies for performance and diversification that have been employed in past strategy research has not been unanimously agreed upon. Given the current state of confusion that exists with regard to the topic of diversification, performance and its relationship within an inter...

H 1 optimal estimators guarantee the smallest possible estimation error energy over all possible disturbances of xed energy, and are therefore robust with respect to model uncertainties and lack of statistical information on the exoge-nous signals. We have recently shown that if prediction error is considered, then the celebrated LMS adaptive l-tering algorithm is H 1 optimal. In this paper we ...