We consider a principal-agent model, where a single agent exhibits problems of self control modelled using Gul, Pesendorfer (2001) type temptation preferences. For a general class of preferences, yet specific family of temptation utilities, we characterize an optimal contract in such a setting...

In this paper we report on the results of a large-scale measurement study of two popular peer-topeer systems, namely BitTorrent and eMule, that use practical and lightweight incentive mechanisms to encourage cooperation between users. We focus on identifying the strategic behavior of users in...