1.-Suppose-the-people-in-a-certain-economy-decide-to-stop-saving-and-instead-use-all-their-income-for-consumption.-They-do-nothing-to-add-to-their-stock-of-human-or-physical-capital.-Discuss-the-prospects-for

growth-of-such-an-economy

2.-Singapore-has-a-saving-rate-that-is-roughly-three-times-greater-than-that

of-the-United-States.-Its-greater-saving-rate-has-been-one-reason-why-the

Singapore-economy-has-grown-faster-than-the-U.S.-economy.-Suppose

that-if-the-United-States-increased-its-saving-rate-to,-say,-twice-the

Singapore-level,-U.S.-growth-would-surpass-the-Singapore-rate.-Would

that-be-a-good-idea?

3.-Suppose-an-increase-in-air-pollution-causes-capital-to-wear-out-more

rapidly,-doubling-the-rate-of-depreciation.-How-would-this-affect

economic-growth?

4.-The-population-of-the-world-in 2003 was 6.314-billion.-It-grew-between 1975 and 2003 at-an-annual-rate-of 1.6%. Assume-that-it-continues-to-grow-at-this-rate.

a.-Compute-the-doubling-time.

b.-Estimate-the-world-population-in 2048 and 2093(assuming-all

other-things-remain-unchanged).