<prompt> Translate the following text to EnglishKwa maelezo zaidi juu ya mabadiliko ya hivi karibuni ya ufafanuzi na uainishaji wa NIPA, angalia Brent R. Moulton, Robert P. Parker, na Eugene P. Seskin, A Preview of the 1999 Comprehensive Revision of the National Income and Product Accounts, Survey of Current Business, Bureau of Economic Analysis.  <response>: For more information on the recent NIPA definitional and classificational changes, see Brent R. Moulton, Robert P. Parker, and Eugene P. Seskin, A Preview of the 1999 Comprehensive Revision of the National Income and Product Accounts, Survey of Current Business, Bureau of Economic Analysis 