An increase in the monetary base
will determine an increase in the monetary offer, which will
cause a decrease in interest rates in the money market.
The LM curve will move down: for
a determined level of balanced income, the interest rates will
be less.
The point at which the IS-LM curve
crosses will move towards the right: smaller interest rates
and greater income (the decrease in the interest rates will
cause an increase in investment).
Given the actual level of prices
(Po), the balanced income will be greater, which will cause
the aggregate demand curve to move to the right.