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             Congressional Research Service
             Informning Ih legisIative debaLe sirnce 1914



The Gender Earnings Gap


Women   earn less, on average, than men. This earnings
differential-often called the gender earnings gap-raises
questions about gender equity in labor markets, women's
retirement security, and the potential impact of the gap on
national economic performance, among others. This
InFocus identifies factors that contribute to the gender
earnings gap and may be relevant to congressional
consideration of proposals to support equitable labor market
outcomes for women  and men.

Figure  I. Ratio of Women's  to Men's Median  Annual
Earnings, 1972-2022
Full-Time, Year-Round Workers

   Ratio of Median Annual Earnings

                                                84.0%

  57.9%



  9~72      '982      9~92    2002      2012     2022

Source: U.S. Census Bureau, Historical Income Tables, Table P-40.
Note: A full-time, year-round worker is a person who worked 35 or
more hours per week and 50 or more weeks during the previous
calendar year.

Figure 1 plots the ratio of women's to men's full-time, full-
year annual median earnings from 1972 to 2022, using U.S.
Census Bureau data. This ratio is a summary measure of the
gender earnings gap, which in practice takes on a range of
values that vary across occupations and worker
characteristics. Nonetheless, Figure 1 illustrates several
points of interest:
*  women's  median annual earnings are lower than men's
   throughout the entire 1972-2022 period;

*  the ratio of women's-to-men's median annual earnings
   rose rapidly in the 1980s and 1990s, followed by a
   period of slower growth; and

*  starting around 2013, growth in the ratio increased, and
   in 2022, women's median annual earnings were 84% of
   men's, representing a 16 percentage point gap.

The  Explained  and  Unexplained   Gap
Part of the earnings gap shown in Figure 1 can be
attributed to differences between men's and women's
employment  patterns and other characteristics. Table 1, for
example, illustrates select differences between men's and
women's  educational attainment, full-time work, and
occupations in 1972 and 2022, and shows that differences
have narrowed considerably since 1972.


Updated February 21, 2024


Table  1. Select Worker  Characteristics, by Sex

                                  Men       Women
  Share of Workers:            1972  2022   1972  2022
  With at least a high school   34%   92%   28%    96%
  diploma or equivalent
  With at least a bachelor's degree  8% 41%  5%    49%
  Employed at full-time hours   97%   94%   78%    84%
  Employed at least half the year 96% 97%   88%    96%
  (27 weeks or more)
  Employed in a managerial job  18%    16%   6%    14%
  Employed in a professional job, 13% 23%    7%    25%
  excluding nurses and teachers
Source: CRS analysis of Current Population Survey, Annual Social
and Economic Supplement data from survey years 1973 and 2023.
Note: Analysis restricted to non-military wage and salary workers,
ages 25-64, employed at the time of survey.

Researchers have applied statistical techniques to large-
scale survey data to separate the observed gender earnings
gap into its explained and unexplained portions.

*  The explained portion accounts for observed gender
   differences in factors that affect wages (e.g., education,
   occupation, work experience), assuming that those
   attributes are equally valued for men and women (i.e.,
   an MBA   has the same value to an employer regardless
   of the degree-holder's sex).

*  The unexplained portion is the gap that remains when
   observed characteristics are taken into account (i.e., the
   portion of the gap that cannot be explained by observed
   differences in education, work experience, occupation,
   or other worker or job characteristics).

One  interpretation of the unexplained gap is that it
measures sex-based discrimination. Although research
suggests discrimination is a component, the unexplained
gap plausibly measures the impacts of many factors. This is
because the data that have been used to estimate the
explained and unexplained earnings gaps are limited in their
capacity to fully capture worker attributes that could affect
earnings. For example, although most labor force surveys
collect information on a worker's education, occupation and
industry of work, and weekly work hours, many individual
characteristics (e.g., technical knowledge, competitiveness,
interpersonal skills) and employer-specific attributes (e.g.,
job features and requirements, provision of formal training
and mentoring) are frequently unmeasured. As a result, the
unexplained portion of the wage gap-as conventionally
measured-will  capture many things, including, potentially,
unmeasured  worker characteristics that affect productivity,

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