Question

If the economy is below its full-employment level of real national income, a supply-side economist would argue the appropriate policy is

Answer 1

If the economy is below its full-employment level of real national income, a supply-side economist would argue the appropriate policy is expansionary fiscal policy by lowering marginal tax rates.
Supply side economist tend to believe that the best economic policy is the one that give more freedom to the private sector by lowering all barriers on production of goods and services