Title: Improving gdp measurement
Description: "Two often-divergent U.S.  GDP estimates are available, a widely-used expenditure side version, GDPE, and a much less widely-used income-side version GDPI .  We propose and explore a "forecast combination" approach to combining them.  We then put the theory to work, producing a superior combined estimate of GDP growth for the U.S., GDPC.  We compare GDPC to GDPE and GDPI , with particular attention to behavior over the business cycle.  We discuss several variations and extensions"--National Bureau of Economic Research web site.