Solve the IS equation again: because y=c+i+g, Y = 90+0.8 (Y-50)+140-5r+50, that is, y= 1200-25r.
The equilibrium income is 1000,
Equilibrium interest rate: 1000= 1200-25r, r=8,
Investment: i= 140-5*8= 100.
The main contents of money supply include: the division of money levels; The process of money creation; Determinants of money supply, etc.
In the modern market economy, the scope and form of currency circulation are constantly expanding, and cash and demand deposits are generally considered as money. Time deposits and some credit instruments that can be converted into cash at any time (such as government bonds, life insurance policies and credit cards) are also widely regarded as monetary.
It is generally believed that the monetary level can be divided as follows:
M 1= cash+demand deposit+traveler's check+other check deposit;
M2=M 1+ small time deposit+savings deposit+retail money market * * * same fund;
M3=M2+ other financial assets.