The same Wikipedia article notes that the increase in median income is due to increasing women’s wages and increased participation of women in the labor force.

The same Wikipedia article notes that the increase in median income is due to increasing women’s wages and increased participation of women in the labor force. > While wages for women have increased greatly, median earnings of male wage earners have remained stagnant since the late 1970s. Household income, however, has risen due to the increasing number of households with more than one income earner and women's increased presence in the labor force.