What is an example of government expenditure that positively affects the economy

a)the government increases tariffs with foreign nations, resulting in a trade freeze
b)the government opens a military base in a small town, increasing demand for local products.
c) the government increases corporate taxes, causing prices of goods to increase.
d) the government increases regulations on the airline industry increasing barriers to entry.

Mankiw attributes – chapter 1 and his 10 principles – differences in living standards within a countryover time and across countries at a moment in time to: a. the presence or absence of inflation and unemployment.b. the allocation of resources between private markets and the public sector.c. those that have dealt successfully with the efficiency v. equality tradeoff and those that haven’t.d. differences in productivity.e. ones that think at the margin and respond to incentives and those that don’t.