<P> The national income and product accounts (NIPA) are part of the national accounts of the United States . They are produced by the Bureau of Economic Analysis of the Department of Commerce . They are one of the main sources of data on general economic activity in the United States . </P> <P> They use double - entry accounting to report the monetary value and sources of output produced in the country and the distribution of incomes that production generates . Data are available at the national and industry levels . </P>

Who collects the nipa data used to calculate gdp