Series Is Presented Here As Two Variables--(1)--Original Data, 1888-1926 (2)--Original Data, 1921-1939. The Following Adjustments Were Made To The Data By NBER: Linear Interpolation For Monthly Total Insured Figures; May, 1921-February, 1922--Short-Time Workers Added In; Figures For Great Britain And Ireland Lowered To Great Britain And Northern Ireland Basis. March, 1922-October, 1922 Data Have Short-Time Workers Added In. November 1922-October 1923 Data Have NBER Adjustments For Short-Time Workers. November 1923-July 1939 Data Have Short-Time Workers Added In. September 1937-July 1939 Data Have An NBER Adjustment To Make Continuous Computation Of The Number Of Unemployed. Source: Ministry Of Labour Gazette, Monthly Issues .
This NBER data series m08004b appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08004b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Percentage Unemployed, Building Trades, Insured Workers for United Kingdom [M08F4BGBM156NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M08F4BGBM156NNBR/, July 30, 2015.