5. Make a study of an enterprise in your community which has either
recently failed, or which is not now in a thriving condition. Attempt
to discover the reasons for the failure to progress.


II

6. The law of variable proportions. (Carver, _Elementary Economics_,
chapter xxix.)

7. The nature of income. (King, _Wealth and Income of the People of
the United States_, chapter v.)

8. Relation of public education to income. (Thompson, _Elementary
Economics_, pages 299-303.)

9. Reasons for the scarcity of capital. (Carver, _Elementary
Economics_, chapter xxxvi.)

10. The productivity of capital. (Taussig, _Principles of Economics_,
vol. ii, chapter xxxviii.)

11. Historical changes in the rate of interest. (Bullock, _Selected
Readings in Economics_, pages 563-568.)

12. The rent of land. (Carver, _Elementary Economics_, chapter
xxxiii.)

13. Causes of the scarcity of labor. (Carver, _Elementary Economics_,