In addition to helping consumers navigate the web search engines offer a new kind of e-service known as sponsored search. A search engine provides an auction interface to advertisers that allows them to be included in a list of sponsored links. Consumers then search the list to find the best...

According to theory a pure meritocracy is efficient because individual members are competitively rewarded according to their individual contributions to society. However, purely individually based meritocracies seldom occur. We introduce a new model of social production called “team-based...

A new mechanism that substantially mitigates social dilemmas is examined theoretically and experimentally. It resembles the voluntary contribution mechanism (VCM) except that in each decision round subjects are ranked and then grouped according to their public contribution. The game has multiple...

Demand reduction in Uniform-price and English auctions are strategic reactions by participants to reduce price and thus increase potential profits. Laboratory experiments similar to the field experiments performed by List and Reiley (Am. Econ. Rev. 2000; <B>9</B>(4): 961-972) in which two individuals with...</b>

We examine theoretically and experimentally how competitive contribution-based group formation affects incentives to free-ride. We introduce a new formal model of social production, called a "Group-based Meritocracy Mechanism" (GBM), which extends the single-group-level analysis of a Voluntary...