who measures the labor force, and how is it defined? multiple choice 1 the u.s. labor commission (uslc) measures the labor force as people over 18 years of age who are employed and those who are actively seeking work. the u.s. bureau of employment (usbe) measures the labor force as people over 16 years of age who are employed and those who are actively seeking work. the u.s. bureau of labor statistics (bls) measures the labor force as people over 16 years of age who are employed and those who are actively seeking work. the u.s. bureau of labor statistics (bls) measures the labor force as people over 18 years of age who are employed and those who are actively seeking work.