National data is used for policy analysis on different issues regarding the U.S. economy as a whole. The main sources are:

1. Bureau of Labor Statistics: The BLS is a governmental statistical agency that collects, processes, analyzes, and disseminates essential statistical data to the American public, the U.S. congress, other Federal agencies, State and local governments, business, and labor representatives.
2. U.S Federal Reserve Data (FRED): FRED is a database maintained by Research division of the Federal Reserve Bank of St Louis that has more than 421,000 economic time series from 81 sources. They cover banking, business/fiscal, consumer price indexes, employment and population, exchange rates, GDP, interest rates, monetary aggregates, producer price indexes, reserves and monetary base, U.S. trade and international transactions, and U.S. financial data. The time series are compiled by the Federal Reserve and collected from government agencies such as the U.S. Census, and the Bureau of Labor Statistics.
3. U.S Census Bureau Data: The U.S. Census Bureau provides data on historic and current economic trends, statistics by sector, and more.
4. U.S Bureau of Economic Analysis Data: the BEA is part of the Department of Commerce, and provides current and historical data tables including national income and product account tables, data for the U.S. international transaction accounts, detailed data on economic activity by region, state, metropolitan area, BEA economic area, and county, along with data showing how industries interact to provide input to and take input from each other.