4. Other things being constant, what will be the effect of each of the following on disposable income (or real GDP)? (a) An increase in the amount of liquid assets consumers are holding (b) A rapid upsurge in the rate of technological advance (c) A sharp increase in the real interest rate 5. Other things being constant, what will be the effect of each of the following on consumption and saving schedules? (a) Concern grows over rising prices. (b) Real interest rates fall