Answer:
The effect of government regulation on a monopolist's production decisions
Explanation:
The effect of a large government budget deficit on the economy's price level
The superavit or deficit of the government is a macroeconomics subject.
The money market is also macroeconomics.
The impact of regulation or specifit taxes or tax extemption on a monopolist's production will be part of microecnomics, because it will impact on which level the monopolist's production finds equilibrium after the legislation.