Describe the structural features of the U. earned income tax credit. Describe a defined pension benefit plan and a defined pension contribution plan....

1.    Describe the structural features of the U.S. earned income tax credit.

2.    Describe a defined pension benefit plan and a defined pension contribution plan.

3.    Explain the Ramsey Rule as it applies to optimal commodity taxation. 

4. Explain the inverse elasticity rule as it applies to optimal commodity taxation. How is the inverse elasticity rule related to the Ramsey Rule?