Series Is Presented Here As Two Variables--(1)--Original Data, 1890-1928 (2)--Original Data, 1913-1933. Source: P.H. Douglas, Real Wages In The United States, 1890-1926, P. 135; Douglas And Jennison, The Movement Of Money And Real Earnings In The United States, 1926-1928, University Of Chicago Studies In Business Administration, No.3.
This NBER data series a08054a appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: a08054a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Average Union Hourly Earnings In Building Trades for United States [A0854AUSA052NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A0854AUSA052NNBR/, August 4, 2015.