Many government payments and policies are tied to the consumer price index (CPI). The most important of these are Social Security payments, which represent nearly 25% of total federal spending. Suppose that Erin currently receives Social Security payments and will continue to receive them next year. If the CPI rises by 2.3% this year, then next year the payment in each of Erin's Social Security payments will be than this year's payments by percent. Suppose that the government wants to index a tax credit given to manufacturers by a common price index. Which one of the following choices would most closely match changes in the costs of operating manufacturing businesses? The hedonic price index The consumer price index (CPI) The GDP deflator The producer price index (PPI)