Macroeconomics 8th Edition by David Colander

Exercise 6

The U.S. government taxes U.S. companies for their overseas profits, but it allows them to deduct from their U.S. taxable income the taxes that they pay abroad and interest ona. Is it possible that the overseas profit tax produces no net revenue?
b. What would you suggest to the government about this tax if its desire were to increase corporate income tax revenue?
c. Why might the government keep this tax even if it were not collecting any net revenue?