The slope of the consumption function at any level of YDIS shows the value of MPCDIS at that level of YDIS

If YDIS in the economy was 1,000 billion dollar a year, planned consumer spending would also equal 1,000 billion dollar a year.

If YDIS in the economy was less than 1,000 billion dollar a year, planned saving would be negative

The consumption function must be a straight line.

A fall in share prices

A fall in interest rates

Expectations that the economy will soon go into a recession

Households deciding to be thriftier

An increase in autonomous consumption will shift W downwards

An increase in induced consumption would make the W line flatter

An increase in injections will shift the J line upwards

If either line shifts upwards, the equilibrium level of output will increase

I

G

M

X

An increase in exports

An increase in the fraction of their income which people spend on imports

An increase in tax rates

An increase in thriftiness by households