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American Economic Review: Papers & Proceedings 2008, 98:2, 363–369
http://www.aeaweb.org/articles.php?doi=10.1257/aer.98.2.363
Gender Differences in Careers, Education, and Games†
Transitions: Career and Family Life Cycles of the Educational Elite
By Claudia Goldin and Lawrence F. Katz*
Among life’s most vital transitions are those
concerning family and career. We decide when
and whom to marry, how many children to have,
whether to further our education, and which
occupations and jobs to pursue.
Fundamental aspects of these transitions began
to change around the early 1970s for the college
educated generally, and for women in particular. The median age at first marriage among college graduate women, which had been stable at
about 22.5 years old from the 1950s to the early
1970s (for birth cohorts from the 1930s to about
1950), increased by 2.5 years between 1972
and 1979 (for birth cohorts from about 1950 to
1955). The fraction of women not having a first
birth by around 40 years old increased from 20
percent for those graduating in the early 1960s,
to 28 percent for those graduating in the 1970s.
College graduate women greatly increased their
education in professional schools; the fraction
female among first-year law and medical school
students, for example, was 10 percent in 1970
but rose to 40 percent by 1990.
A considerable amount is known regarding
family and career transitions among cohorts
of college graduates during much of the past
century. But far less is known about whether
these transitions have been similar for those
who graduated from the more selective institutions of higher education. Focusing on more
selective institutions is also called for by many
recent issues. Among them is the discussion of
“opting out” in the popular literature, which has
concerned the possibility that female graduates
of highly selective colleges squander their education. In addition, we do not know if the narrowing of the gender gap in earnings has also
occurred among those in the upper tail of the
educational distribution.
We ask whether the general trends of the past
three decades in family and career transitions
can be observed, as well, among those graduating from one of the most elite institutions of
higher education. We also explore the trade-offs
between family and career, particularly for college graduate women.
†
Discussants: Francine Blau, Cornell University; Muriel
Niederle, Stanford University; Charles Holt, University of
Virginia.
I. Harvard and Beyond
The data we use are from a recently compiled
dataset, Harvard and Beyond (H&B), modeled after the Mellon Foundation’s College and
Beyond (C&B) data. In assembling H&B, we
included all members of 12 Harvard/Radcliffe
classes (1969 to 1972, 1979 to 1982, 1989 to
1992), defined by their entry or graduation
years, and all the women in one class (1973).
The classes cluster in three cohorts, termed
here C1970, C1980, and C1990. The oldest
(C1970) entered or graduated when Harvard and
Radcliffe had separate admissions, dormitories
were just becoming coeducational, and social
unrest among undergraduates nationwide was
widespread. The middle cohort (C1980) is similar in age to the largest C&B cohort and entered
* Goldin: Department of Economics, Harvard University, Cambridge, MA 02138 (e-mail: cgoldin@harvard.edu);
Katz: Department of Economics, Harvard University, Cambridge, MA 02138 (e-mail: lkatz@harvard.edu). We thank
the President’s Office of Harvard University for funding the
data collection, the Mellon Foundation for research support, the Harvard Alumni Association for providing contact
information, and the Harvard University Registrar’s Office
for their cooperation. Naomi Hausman worked tirelessly
to put the dataset in usable form, and Bryce Ward helped
design and implement the survey. We are deeply grateful
to them.
Marriage age and fraction female among first-year
professional students are from Goldin and Katz (2002).
Fractions not having a first birth among all female college
graduates are from the Current Population Report Fertility
Supplements and refer to the average for the 35- to 44-yearold group.
363
364
college just as the nation’s college graduates
were 50 percent female. The youngest cohort
(C1990) left Harvard about 15 years ago, affording them enough time to engage in many of the
transitions we are studying. Women were just 21
percent of Harvard’s undergraduates in C1970
(which is why we also included the women of
1973), 34 percent in C1980, and 41 percent in
C1990.
We collected information on these individuals from university administrative records, a
survey instrument, and several other sources.
The information we have is anchored at various moments in the lives of these cohorts: just
after they left college, 15 years out, and contemporaneously. The survey also asked retrospective questions on marriage, children, childcare,
employment, occupations, and nonemployment
spells, among other variables.
About 21,000 individuals were members of the
selected classes, the vast majority of whom graduated from Harvard, and 20,000 of these individuals were matched to administrative records. We
obtained regular or e-mail addresses for 16,426
of them and we received Web-based or hardcopy survey responses in the fall of 2006 from
almost 7,000 individuals, which yielded 6,554
usable responses for an overall response rate
of 40 percent. The mean SAT scores (Table 1)
show the obvious fact that this is an exceptional
group of individuals.
II. Family
Similar to other college graduates in the
years around 1970, Harvard graduates married relatively early: 36 percent of the women,
and 34 percent of the men, married within two
years of their class graduation. The median
age at first marriage was 27 for both. But by
the class of 1990, just 9 percent of the women
and 11 percent of the men married within two
years of graduation, and the median age at first
marriage increased to 30 years old for both.
The C1970 group also divorced at much higher
rates than the other two cohorts: 23 percent for
the C1970 women versus 13 percent for C1990.
MAY 2008
AEA PAPERS AND PROCEEDINGS
The response rate was 45.7 percent for women and 37.4
percent for men, similar across cohorts. Survey respondents
had a modestly higher mean college grade point average
than nonrespondents.
(Summary statistics for the H&B dataset are
given in Table 1.)
Even though the transition to marriage
changed pari passu with other college graduates, the transition to having children in the
H&B sample differed in important ways from
national data. Even for the oldest cohort, the
members of which married at the youngest ages,
first births for women were significantly delayed.
In fact, various measures of fertility are practically identical across the three cohorts, although
the total number of births increased from 1.17
to 1.35 and then decreased slightly to 1.31. The
median age at first birth, conditional on having
a birth, was 31 to 32 years old, and the fraction
of women having no births 15 years after their
class graduated was hardly unchanged (37 percent for C1970, 39 percent for C1980, and 38
percent for C1990). Among those having at least
one child, the three cohorts are fairly similar
in terms of total family size after 15 years. In
consequence, birth spacing among those having
more than one child was closest for the youngest
cohort, which married at the oldest ages.
III. Career
Among all college graduates in the United
States, women’s entry into various professions
soared around 1970. But among the women in
the H&B cohorts, the fraction continuing to professional and graduate school was already high
even for the oldest cohort (C1970). In fact, those
graduating from medical school within 15 years
of obtaining a BA decreased slightly across the
three cohorts, from 18 to 17 percent. Those with
a doctorate, again 15 years out, declined from
20 to 18.5 percent. Counterbalancing these
trends is that law degrees increased from 17 to
20 percent and MBAs greatly increased from
5 to 14 percent (all within 15 years of college
graduation).
It should not be surprising that the H&B figures for professional degrees are far higher than
Women’s doctorate fields for those completing PhDs
by 15 years out underwent modest changes across the
two decades. Among the largest changes are the relative
decrease in the social sciences (30 to 18 percent from C1970
to C1990) and the relative increase in the physical sciences
(5 to 11 percent). Few received education doctorates in any
of the cohorts, and the relative decline in the humanities
was not large (23 to 19 percent).
VOL. 98 NO. 2
Transitions: Career and Family Life cycles of the Educational Elite
365
Table 1—Summary Statistics for Harvard and Beyond Dataset
C1970
C1980
C1990
Variables measured at 15 years out, unless otherwise noted a
Female
Female
Female
Mean college SAT verbal
Mean college SAT math
Family
Percent married, within 2 years of BA
Percent ever married
Percent ever divorced
Percent with a first birth
Mean number of births
Career
Percent completing medical school
Percent completing law school
Percent completing business school (MBA)
Percent completing doctorate
Percent with at least one professional degree or doctorate b
Percent employed full time, full year
Percent with no employment
Mean number of months nonemployed
Number of observations
718
700
667
670
673
694
35.7
87.5
22.9
62.5
1.17
16.8
82.2
13.9
60.8
1.35
9.4
82.0
12.9
62.0
1.31
18.2
17.3
5.4
20.1
58.0
62.0
9.0
16.4
672
15.0
19.7
14.7
14.0
60.0
63.5
10.5
14.2
858
16.6
20.4
14.0
18.5
65.5
60.3
10.1
14.3
1,013
Male
Male
Male
678
702
659
703
671
723
34.2
88.2
18.2
65.7
1.28
13.3
86.5
9.2
66.0
1.42
10.5
86.2
9.0
64.9
1.41
18.5
24.8
10.9
18.1
66.1
93.0
1.1
4.2
1,453
18.0
24.1
20.0
17.3
70.8
94.1
0.9
3.5
1,363
Mean SAT verbal
Mean SAT math
Family
Percent married, within 2 years of BA
Percent ever married
Percent ever divorced
Percent with a first birth
Mean number of births
Career
Percent completing medical school
Percent completing law school
Percent completing business school (MBA)
Percent completing doctorate
Percent with at least one professional degree or doctorate b
Percent employed full time, full year
Percent with no employment
Mean number of months nonemployed
Number of observations
14.3
20.4
19.4
18.2
65.4
89.9
1.0
5.3
1,195
Notes: C1970 5 Harvard undergraduates who graduated, or whose incoming class graduated, from 1969 to 1972, and 1973
for women; C1980 5 1979 to 1982; C1990 5 1989 to 1992.
a
“15 years out” 5 15 years after the individual’s original college class graduated.
b
Professional degrees include those in law, business, and medicine.
Source: Harvard and Beyond dataset (see text). Further information about the data collection can be found at: http://kuznets.
fas.harvard.edu/~goldin/harvardandbeyond.html.
those for the nation as a whole. Just 1 percent of
all female college graduates entered law school
in 1970 and only 0.4 percent entered medical
school. Also not unexpected is that the fractions
pursuing professional degrees in the H&B for
1990 remain far higher than national averages,
which were 3.3 percent for law school and 1.2
percent for medical school. What is surprising
is that 58 percent of the oldest female cohort in
the H&B obtained one of the four degrees—MD
(also DVM, DDS, etc.), JD, PhD, and MBA—
and that the H&B aggregate figures for professional degrees increased by just 7.5 percentage
points over two decades.
For the men across these three cohorts, medical school graduates decreased from 18.5 to
366
14 percent, law school graduates from 25 to
20 percent, and doctorates remained constant at
18 percent. A marked shift to the MBA, from
11 to 19 percent, is apparent. Receipt of any one
of these degrees varied somewhat more than for
women, increasing from 66 percent to 71 percent from the first to the second cohorts (C1970
to C1980) and then decreasing substantially to
65 percent for C1990, all anchored at 15 years
out.
The main findings with regard to post-BA
education are that even around 1970 female
graduates in the H&B were earning professional
degrees in fields such as medicine and law at
levels similar to those found 20 years later for
graduates of the same institution. The similarity, moreover, is not due to late entry to professional and graduate schools. Rather, it is related
to the fact that the oldest cohort delayed having children, even though it married early, and
many had no children. The women of C1970 had
one foot in the past and one firmly planted in
the future; they conformed in some respects yet
led the way in many others. Finally, the changes
for both the men and the women concern less
the fraction obtaining at least one of the postBA advanced degrees and more which of the
degrees they obtained.
The most striking changes with regard to
occupations concern the ascendancy of finance
and management. Among the oldest cohort
(C1970), 22 percent of the men were in occupations in these fields 15 years after their class
graduated. But for the youngest cohort (C1990),
38 percent were. The change, moreover, was
driven primarily by positions in finance, which
increased from 5 to 15 percent of the total. The
relative growth in business occupations for men
came largely at the expense of those in law and
medicine, which declined from 39 to 30 percent
as a combined total. These changes, therefore,
are mirrored in the increase in MBA degrees
relative to those in law and medicine. The overall changes are also apparent in women’s occupations: 12 percent of the women in C1970 were
in management and finance occupations, but 23
percent were by C1990.
MAY 2008
AEA PAPERS AND PROCEEDINGS
See Thomas Philippon and Ariell Reshef (2007) for an
analysis of national trends in the growth of employment,
relative earnings, and relative education intensity in the
financial sector since 1970.
IV. Earnings
The members of the H&B cohorts earn
exceptionally large amounts, in general, and
their distribution of earnings has a long right
tail, particularly for the men. Median earnings in 2005 were $90K for women but $162.5K
for men. Among full-time full-year workers,
median earnings were $112.5K for women and
$187.5K for men. Almost 8 percent of the men
and 2 percent of the women had labor market
earnings in excess of $1 million. These are not
average workers, not even typical college graduates, and the gender gap in earnings is extremely
large despite the fact that women in the sample
earned considerable amounts.
The gender gap in earnings is a whopping
0.852 log points (see Table 2), including only
graduation class dummies in the regression. The
gap is reduced to 0.517 with controls for weeks
and hours worked in 2005. A further decline, to
0.396, results after adding college concentration
(major) and graduate degrees, among other educational factors. Differences in college majors
by sex (e.g., about 12 percent of the men, but 4
percent of the women, were economics majors)
account for about half of the decreased residual,
and the composition of graduate degrees (e.g.,
men earned more MBAs) accounts for most
of the other half. The inclusion of controls for
noneducation spells out of work since college
graduation lowers the gap further to 0.359 log
points, and the addition of occupation dummies
reduces it to 0.301. Similar findings exist for the
three cohorts separately. Even with our rich set
of controls for educational performance, time
out of work, and occupation, a residual gap of
substantial magnitude remains.
Earnings data cover pre-tax earnings from all jobs in
2005. The earnings question was categorical, with 18 earnings categories ranging from less than $20,000 to $5 million or more. We impute earnings at the mid-point of each
interval and follow the standard procedure of multiplying
top-coded earnings by 1.4.
In contrast, 2005 national median annual earnings of
full-time full-year workers (25 years old and over) with at
least a BA degree were $46,948 for women and $66,166 for
men (US Census Bureau 2007).
The findings in Table 2 are not driven by earnings outliers, and the results for the gender earnings gap and educational differentials are similar in median regressions using
the same specifications.
VOL. 98 NO. 2
Transitions: Career and Family Life cycles of the Educational Elite
367
Table 2—Annual Earnings in the Harvard and Beyond Sample: Gender Gap and Determinants
Female
MBA
112
122
132
20.852
10.0312
20.517
10.0292
20.396
10.0282
0.518
10.0382
0.380
10.0342
0.378
10.0412
20.216
10.0342
yes
no
no
no
0.123
6,207
yes
yes
no
no
0.304
6,207
yes
yes
yes
no
0.419
6,207
JD
MD, DDS, DVM, etc.
PhD
Any no work spell
Share of no work spells
Graduation class dummies
FTFY status dummies
Controls
Occupation dummies
R2
Number of observations
142
20.359
10.0282
0.525
10.0382
0.363
10.0332
0.333
10.0412
20.237
10.0332
20.253
10.0322
20.587
10.1322
yes
yes
yes
no
0.433
6,207
152
20.301
10.0262
0.264
10.0382
0.182
10.0432
0.160
10.0692
20.090
10.0352
20.246
10.0302
20.429
10.1252
yes
yes
yes
yes
0.509
6,207
Notes: Each column is a separate regression. The dependent variable in all regressions is the natural log of annual earnings in year 2005. Controls include college grade point average 1GPA2 , SAT math, SAT verbal, missing variable indicators
for GPA and SAT, 48 college concentration 1 major2 dummies, dummy variables for other master’s and other professional
degrees. There are three full-time, full-year 1FTFY2 status dummies and 19 occupation dummies. Standard errors are in
parentheses.
Source: Harvard and Beyond dataset 1 see text2 .
The premium to an MBA is 0.518 log points
(column 3) relative to the base group with no
graduate degrees, and substantial labor market
returns also exist for law and medical degrees.
In contrast, those with PhDs have lower earnings than other comparable Harvard graduates.
The most lucrative college major is economics, which has an earnings premium of 0.33 log
points and a premium of 0.19 including occupation controls. The highest earnings by occupation are garnered by those in finance, for which
the earnings premium relative to all other occupations is an astounding 1.08 log points, or 195
percent (column 4 specification, with a dummy
for finance, not in table).
Male earnings are strongly and positively
related to the number of children in the family,
whereas female earnings are negatively related,
especially for those having three or more. But
the negative impact of children on women’s
earnings is entirely accounted for by hours
worked. In fact, a positive relationship between
children and earnings exists for women working
full-time full-year, suggesting higher reservation
wages for those with more children and positive
selection into the labor force based on numbers
of children.
V. Career and Family Trade-Offs
The degree to which highly educated women
take time off from their careers and occupations
has been a topic of recent speculation. We find,
across the three cohorts, a great similarity in the
number of months that women take off, for reasons ranging from family responsibilities to job
changes to personal health issues. In fact, rather
than rising over time, nonemployment spells
have declined somewhat.
Children, to be sure, account for most of
women’s nonemployment spells. Even among
those with at least one child, slightly more than
50 percent (15 years after graduation) of all
See, e.g., The New York Times article that coined the
phrase the “opt out revolution” (Lisa Belkin, Magazine
Section, October 26, 2003).
368
MAY 2008
AEA PAPERS AND PROCEEDINGS
Table 3—Employment at 15 Years after Graduation for Harvard and Beyond Women
Percent working full time, full year, 15 years after graduation
Cohort
C1970
C1980
C1990
Education
No graduate degree
Master’s, not MBA
MBA
JD
MD, DDS, DVM, etc.
PhD
No child …
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