#cfa #cfa-level-1 #economics #microeconomics #reading-13-demand-and-supply-analysis-introduction #study-session-4
if elasticity were equal to negative two, then the percentage change in quantity demanded would be twice as large as the percentage change in price. It follows that a 10 percent fall in price would bring about a rise in quantity of greater magnitude, in this case 20 percent. True, each unit of the good has a lower price, but a sufficiently greater number of units are purchased so that total expenditure (price times quantity) would rise as price falls when demand is elastic.