Macroeconomic policies involve either fiscal policy or monetary policy - INFLUENCES AGGREGATE DEMAND
Fiscal policy -
- This is the budget released mid may every year
- There are two ways it can be enacted - through either government spending or taxation
EXPANSIONARY FISCAL POLICY (THE GAS) - This is usually enacted in a recession to boost ec growth, they either lower taxes or increase government spending or both. Lower taxes leads to increase in disposable income for individuals and investors, which ultimately leads to increased investment and consumption therefore increased aggregate demand and increased gdp. Government spending is self explanatory
CONTRACTIONARY FISCAL POLICY (THE BRAKE) - This is usually enacted in a boom to slow ec growth, basically the opposite, either increase taxes or decrease government spending or both. Same thing, higher taxes leads to less disposable income, leading to decreased consumption leading to decreased aggregate demand and lower gdp.
Fiscal is not necessarily short term. Say for example the government increases spending and decides to build a bridge. They must plan to build it, consulting with people, get it through parliament, find workers and actually build the bridge. By the time it's done the economy could be out of recession and at full employment
Monetary Policy
- Enacted by the RBA to influence the money supply market and the cash rate
- Either sells or buys commonwealth government securities in the short term money markets to banks (ie westpac, cba etc) - known as domestic market operations
LOOSENING MONETARY POLICY - Enacted to increase economic growth. The RBA BUYS commonwealth government securities in the overnight money market, which INCREASES the money supply as there is now an excess of borrowable funds from the banks. This leads to a decrease in the cash rate and ultimately a decrease in market interest rates. Consumers & investors can now more easily access funds due to lower interest rates to pay back on the loans. This leads to an increase in investment and consumption, leading to an increase in aggregate demand and an increase in GDP.
TIGHTENING MONTARY POLICY - Enacted to slow down economic growth. The RBA SELLS commonwealth government securities in the overnight money markets, which DECREASES the money supply as there is now a shortage of borrowable funds from the banks. This leads to an increase in the cash rate and ultimately an increase in market interest rates. Consumers & investors do not want to borrow funds as there is high interest rates and loans will be more expensive to pay back, therefore investment and consumption will fall, leading to decrease in aggregate demand and a decrease in GDP.
As for Microeconomic - Deals with AGGREGATE SUPPLY
Mainly aimed at individual industries seeking to increase aggregate supply (output) by improving efficiency and productivity of producers. This is enacted by the government with examples including deregulation, competition policy, tax polcy and reducing protection etc. I'm not extremely familiar with micro so you might have to ask someone else.