Government units gather information about prices in our economy and publish it as price indexes from 59._____ the rate of change can be determined. A price index measures changes in prices using the price for a given year as the base. The base price is set at 100, and the other prices are reported as a percentage of the base price. A price index makes 60._____ possible to compare current prices of typical consumer goods, for example, with prices of the same goods in previous year.