My research applies and extends multivariate times series methods to address how product innovation, pricing, retail promotion and advertising help companies improve long-term performance.

1. "Monetary Value of Word-Of-Mouth Marketing in Online Communities," with Michael Trusov, Randolph E. Bucklin
2. "The Drivers of Online Readership: A Decomposition Approach,” Social Science Research Network, 2001,Working Paper 01-08.