The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNS11300001
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, Labor Force Participation Rate: Men [LNS11300001], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/LNS11300001/, September 1, 2015.
FRED BlogGender labor force participation gaps