Three lessons that I chose are: 1. Public Expenditures: Public Goods and Externalities. 2. Public Expenditure: Social Insurance and Income Maintenance, 3. The United States Revenue System. Your challenge for you final research paper in this course is to select three (3) of these lessons or themes and to tie them together in a creative and meaningful (thoughtful) way that is demonstrative of critical thinking and to construct a final paper around these three lessons. Please write a ten (10) page paper addressing the three most important lessons learned (the weekly take away lessons) that you have learned in this course.