The more inelastic the schedule, the greater the decline in the money rate of interest for a given expansion of the money supply. Second, the more elastic the investment demand schedule, the larger the response of investment for a given change in the interest rate. Third, the less elastic the saving schedule, the larger the value of the multiplier, hence the greater the increase in real output for a given change in investment. Fourth, the more elastic the demand for labor, the larger the increase in employment for a given change in the real wage. Lastly, the smaller the value of k, the smaller the reversal effect for a given change in money income. It is upon the value of these variables that any discussion of the importance of money in the Keynesian system much center.