For general conditions of economic activity and forecasts, see the Survey of Current Business, the Federal Reserve Bulletin, and the Economic Report of the President at:
https://www.federalreserve.gov/publications/bulletin.htm
https://fraser.stlouisfed.org/title/45
For qualitative forecasting, see the Institute for Supply Management, the University of Michigan's Survey Research Center, and the Livingston Survey of the Philadelphia Federal Research Bank, respectively, at:
http://www.src.isr.umich.edu/
http://www.philadelphiafed.org/research-and-data/real-time-center/livingston-survey/
For the index of leading indicators, see the Conference Board and the National Bureau of Economic Research (NBER) at:
http://www.conference-board.org
For forecasts of housing, see:
http://www.forecasts.org/house.htm
For gasoline consumption, see:
http://www.eia.doe.gov/emeu/steo/pub/contents.html
For macroeconometric forecasting, see:
http://fairmodel.econ.yale.edu
http://www.cbo.gov/showdoc.cfm?index=5151
For input-Output tables, see:
http://www.bea.gov/industry/xls/Annual_IOMakeUse_Before
_Redefinitions_1998-2007.xls