We study the evolution of belief systems that suppress productive effort. These include concerns about the envy of others, beliefs in the importance of luck for success, disdain for competitive effort, and traditional beliefs in witchcraft. We show that such demotivating beliefs can evolve when...

Motivated by the public debate regarding corporate responsibility, we construct a memory-based model of decision-making to illustrate how corporate and political communication can impact policy preferences. We test the predictions of our model in a new large-scale survey of U.S. citizens on...