Each month, the U.S. Department of Commerce releases estimates of Disposable Personal Income (DPI), and its a location among Personal Consumption Expenditures (PCE), Personal Savings, Interest Paid by Consumers to Business, and Personal Transfer Payments to Foreigners. In addition, expenditures on individual items composing DPI and PCE are deflated by their respective consumer price indices, and then reaggregated to obtain "constant dollar" DP! and PCE. Movement in the constant dollar series over time indicates changes in quantities of goods and services consumed, since the effect of price changes has been removed.