Chapter 15 Drinking from the Fountain of Knowledge: Student Incentive to Study and Learn – Externalities Information Problems and Peer Pressure Students face four decision margins: (a) How many years to spend in school (b) What to study (c) How much effort to devote to learning per year and (d) Whether to disrupt or assist the learning of classmates. The thousands of studies that have applied human capital theory to the first two questions are reviewed elsewhere in this volume and the Handbook series. This chapter reviews an emerging economic literature on the effects of and determinants of student effort and cooperativeness and how putting student motivation and behavior at center of ones theoretical framework changes ones view of how schools operate and how they might be made more effective. In this new framework students have a dual role. They are both (a) investors consumers who choose which goals (outputs) to focus on and how much effort to put into each goal and (b) workers getting instruction and guidance from their first line supervisors the teachers. A simple model is presented in which the behavior of students teachers and administrators depends on the incentives facing them and the actions of the other actors in the system. The incentives in turn depend upon the cost and reliability of the information (signals) that is generated about the various inputs and outputs of the system. Our review of empirical research support many of the predictions of the model. Student effort engagement and discipline vary a lot within schools across schools and across nations and have significant effects on learning. Higher extrinsic rewards for learning are associated the taking of more rigorous courses teachers setting higher standards and more time devoted to homework. Taking more rigorous courses and studying harder increase student achievement. Post World War II trends in study effort and course rigor for example are positively correlated with achievement trends. Even though greater rigor and higher standards improve learning parents and students prefer easy teachers. They pressure tough teachers to lower standards and sign up for courses taught by easy graders. Curriculum based external exit examinations (CBEEES) improve the signaling of academic achievement to colleges and the labor market and this increases extrinsic rewards for learning. Cross section studies suggest that CBEEES result in greater focus on academics more tutoring of lagging students and higher levels of achievement. Minimum competency examinations (MCE) do not have significant effects on learning or dropout rates but they do appear to have positive effects on the reputation of high school graduates. As a result students from MCE states earn significantly more than students from states without MCEs and the effect lasts at least eight years. Students who attend schools with studious well behaved classmates learn more. Disruptive students generate negative production externalities and cooperative hard working students create positive production externalities. Peer effects are also generated by the norms of student peer cultures that encourage disruptive students and harass nerds. In addition learning is poorly signaled to employers and colleges. Thus market signals and the norms of student peer culture do not internalize the externalities that are pervasive in school settings and as a result students typically devote less effort to studying than the taxpayers who fund schools would wish.