How do YOU think? We tell ourselves that when people are faced with making a decision, they would make reasonable, well informed and carefully thought out decisions. Oftentimes, we think (unconsciously of course) that other people think in the same way that we ourselves do. But for the vast majority of time, this is just not how it works. The latest World Development Report explains the three principles of human decision making: thinking automatically, thinking socially, and thinking with mental models.