The maximum value of multiplier is when the value of MPC is _________.
Investment multiplier refers to the number of time by which the increase in output or income exceeds the increase in investment. It is measured as the ratio between change in income and change in investment and it is denoted as 'k'.
Multiplier(k) => Change in income / change in investment = 1/ {1-MPC(c)} where c is the marginal propensity to consume.
Therefore, the value of multiplier will be maximum when the value of MPC is either infinity or zero.