The slides from the talk can be found here in pdf.
The cited papers are:
Who Wants a Good Reputation? with Larry Samuelson, Review of Economic Studies, 68 (April 2001), 415-441.
Imperfect Monitoring and Impermanent Reputations, with Martin Cripps and Larry Samuelson, Econometrica, 72 (2004), 407-432. (Some of the results are extended in Disappearing Private Reputations in Long-Run Relationships, also with Martin Cripps and Larry Samuelson, JET forthcoming.)
Updated July 26, 2006 .