This dissertation consists of three essays on behavioral economics. The first two investigate the role of a principal in solving the collective action problem in team production, and the third essay provides a critical interpretation of John Maynard Keynes\u27s psychological insights by comparing them with the recent evidence collected in the fields of behavioral and experimental economics. The first essay develops a model in which workers have social preferences in the form of inequality aversion towards the principal. The workers face a rent extractor boss who selects in advance the fraction of total output that she wants to receive from them. The presence of this rent extractor boss may solve the free-rider problem in team production...