In Week 2, students will employ the supply and demand model to develop consumer surplus and producer surplus as a measure of welfare and market efficiency. Students learn about welfare economics–the study of how the allocation of resources affects economic well-being–and will discover that under most circumstances, the equilibrium price and quantity is also the one that maximizes welfare. Students will review different sources of externalities and a variety of potential cures and will see that while markets are usually a good way to organize economic activity, governments can sometimes improve market outcomes. Students will see how the U.S. government raises and spends money and the difficulty of making a tax system both efficient and equitable.