Financial and economic crises are not only due to technical aspects but they also result from human behaviors. Although economists usually describe the behavior through the lens of perfect rationality, an increasing number of paradoxes and empirical contradictions appeared on the markets. These anomalies favored the emergence of a new way of modelling economic behaviors which capture one fascinating psychological fact: the vast majority of agents express their irrationality in the same way opening a room for the modelling of this psychological regularity. Behavioral finance deals with this kind of modelling in the context of financial and investment decisions. A PhD focused on behavioral finance offers an incredible asset for understanding financial markets and their trends.