Understanding corruption is at the heart of treating the dysfunctionality of many countries' public sectors. Yet, most corruption research suffers from one common problem: There is no "objective" measure of public-sector corruption for a cross-section of countries. Most studies on the...

Standard economics uses a one-dimensional concept of motivation. It assumes that people are perfectly rational and are solely motivated in a selfish way. This essay argues that people differ in their preferences with respect to pro-social orientations, that preferences are plastic and...