In this paper, we present evidence from a large-scale natural experiment in which different fundraising schemes are tested and compared: lead donor, standard linear matching (1:1), and an alternative matching scheme in which the matching amount goes to another project. The lead donor treatment,...

We analyze a stylized model of the world grain market characterized by a small oligopoly of traders with market power on both the supply and demand side. Crops are stochastic and exporting countries can impose export tariffs to protect domestic food prices. We show that export tariffs are...

We study an online fundraising campaign run on an opera ticket booking platform. After establishing a baseline, a first change doubled the donation grid. A second change altered the navigation of the website rendering the act of declining to donate more salient. The contribution of our paper is...

In a tedious real effort task, subjects know that their piece rate is either low or ten times higher. When subjects are informed about their piece rate realization, they adapt their performance. One third of subjects nevertheless forego this instrumental information when given the choice - and...