Ever wonder why you ended up at the job you did? You may have your genes to thank
Twin studies show that the career of your dreams may be the career of your genes. In 1979, identical twins Dean and David Kopsell took part in a study I conducted on cooperation and competition
between twins. They were 9 years old at the time, a highly
compatible pair who worked together on their puzzle task with skill
and motivation.
The smiles on their faces reflected the joy they felt in a job well
done. Their IQ scores were well above average and perfectly
matched.
Today, at 29, Dean and David are both finishing doctoral degrees in
horticulture at the University of Georgia and are seeking similar
research positions at the same institution. How did the Kopsell
twins come to walk the same career path? What has made me a
researcher and not an investment banker, another person a teacher
and not a ditchdigger? And why do some people find their jobs
gratifying, while others experience only the daily grind? Since we spend
most of our waking hours in the workplace, these questions are
key.
Increasingly, researchers have been turning to identical and
fraternal twins for answers, with dramatic results. They are
finding that genetics, in addition to familial interests,
educational, social and other environmental pressures, have a
considerable impact on how we choose what we do—and how happy we are
with that choice.
Twins reared apart, one University of
Minnesota study showed, chose jobs that were similar in terms of
complexity level, motor skills and physical demands. In other
studies, twins have been shown to have similar tendencies when it
comes to "enterprising," "conventional" and "artistic" undertakings;
they also share basic interests, be they science, the pastry arts
or public speaking. In both sets of measurements, the similarities between identical twins are greater than between fraternal twins.
Is Everybody Happy?
But
it's not only the content of our work that is influenced by genes.
Studies with twins have shown us that our satisfaction on the job
may be at least 30 percent attributable to genetic factors. This finding
is intriguing because it seems to be related to "intrinsic job
satisfaction"—questions of challenge or achievement—rather than
"extrinsic" factors such as work conditions or supervision. In other
words, internal rewards that come from teaching students or composing
music, for example, affect the twins' job satisfaction in more
similar ways than working late hours or having an irate boss. This
makes it easier to understand why identical twins reared apart chose
similar occupations—their matched genetic predisposition probably
steered them toward tasks at which they both excelled and which
brought them joy, pride and satisfaction. People in general may,
therefore, better understand their level of job satisfaction in
terms of how well their abilities and opportunities coincide.
People
bring a unique predisposition or set of expectations to the
workplace that may be harder to modify than previously thought. And
though tinkering with the lighting or buying a better printer or hiring
companionable staff may improve job satisfaction, it may not help as
much as one might hope. These same genetically influenced
tendencies, in more "satisfied" types, may help explain why some
people persist at interesting or fulfilling jobs even when they
offer only modest pay or slim hopes of advancement. When we like
what we do we may be more tolerant of troubles that arise from time
to time in any work.
Job satisfaction may also partly be affected by our characteristic happiness
levels. Recent twin research showed that the genetic contributions
to happiness and stability are about 50 percent and 80 percent,
respectively, while life events have only a transitory effect on
happiness. How does this work on the job? A bonus may momentarily
elevate the satisfaction of an upbeat worker, but is unlikely to
sustain it. Longer coffee breaks may lighten the loathing of a
despondent employee, but won't alter his outlook for long. Moreover,
two individuals with equally well-matched talents and tasks may
vary in job satisfaction if one is typically happy and the other is
typically depressed.
Hitting the Road
Have you been with
your company 20 years? Changed employers every six months? It may be
partly in the genes. In twin studies, genetic factors explained 36
percent of why individuals switch jobs, and 26 percent of why they
change careers. Formal studies define the factors affecting job
choice and satisfaction. They cannot, however, capture the unique
personal decisions and unforeseen events that all of us face when
fashioning our careers. An in-depth look at the lives of prominent
identical and fraternal twins may help bring these fascinating
details into sharper focus.
The Unplanned Presidents
"A
Pair of Presidents Keep It All in the Family" was the headline of a
1995 New York Times article. As I read, I found fascinating and
compelling beyond words the rare matched achievements of Harold T.
Shapiro, president of Princeton University, and his brother, Bernard J.
Shapiro, principal (the Canadian equivalent of president) of McGill
University in Canada. Becoming a university president is a position
held by so few people that to find it repeated by identical twins
suggests that the twins' genetic abilities and personalities were
contributing factors.
I met Harold in his office at Princeton University. His warm and
gracious manner promised sincere and thoughtful dialogue on his twinship
and career.
His office was the epitome of neatness and order, strikingly
different from the typically cluttered halls of academia. I saw only one
other such office—the one belonging to Bernard. Bernard also
welcomed me personally, showing the same friendliness and grace.
Opera music played in the background, an interest the twins share.
Bernard believes his twin has more natural talent, but said, "I was a
better musician because I practiced."
Indeed, more than their differences, the Shapiros, like many identical twins, presented unique versions of the same score:
- In 1961, both twins entered top graduate schools, but in different fields. Harold attended Princeton University in economics, and Bernard attended Harvard University in education. Both chose statistical specializations, prompting Harold's comment: "Something is going on here. I recognize long odds when I see them."
- Harold earned his Ph.D. in 1964, becoming assistant professor of economics at the University of Michigan. Bernard received his Ed.D. in 1967, becoming assistant professor of education at Boston University. The twins served as university provosts in partially overlapping years, Harold at the University of Michigan and Bernard at the University of Western Ontario in Canada. Harold initially declined the presidency of Princeton, and Bernard initially declined the presidency of McGill. Both universities pursued their candidates, who eventually accepted second offers. Both twins also are the first Jewish presidents of their universities.
Challenge
and change draw many people to new jobs. However, the Shapiros
never mentioned status as a factor affecting their career choices,
something many people would consider important. I also noticed that
neither twin expressed regret at sacrificing his personal research
programs for administrative responsibilities, something many academics
(including myself) find surprising.
Paradoxically, the
Shapiros' different routes to university presidency were similarly
unconventional. Neither twin sought the highest post in his academic
institution, but opportunities came their way. A boyhood friend
observed that while neither twin entertained presidential ambitions,
they probably asked the same important questions when the offers
came: Is this job interesting? Could I make a contribution? Would I
do it well?
Physicians, Not Farmers
Drs. Judith and Julie
Swain replay themes brought out by the Shapiro twins. Each holds the
chair of the cardiology department in her respective university, a
demanding position that few people—and fewer women—attain.
Judith
and Julie Swain were born in 1948 in Cypress, Calif., the only
children of Joe and Christine Swain. The twins' father was a
salesman and their mother was a librarian. In 1994, at the age of 45,
Judith became the only female chair of a major university's cardiology
department, at the University of Pennsylvania, and the first female
president of the American Society for Clinical Investigation. She
is currently a professor and chair of the department of medicine at
Stanford University in Palo Alto. Julie, her older sister by five
minutes, was the first female chief of cardiac surgery in an
American medical center, Louisiana State University, and is chair of
the Food and Drug Administration's committee on circulatory system
devices. She is currently a professor and associate director of the
Kentucky Heart Institute at the University of Kentucky in Lexington.
The
Swains saw their mother as a role model, someone who set high
standards for her own accomplishments. According to Julie, "If we were
farmers, we would be good farmers." They agree that their parents
were not responsible for their medical interests, only for the high
motivational levels that each twin brought to these interests.
Indeed, each credits her career choice to the television shows Dr.
Kildare and Ben Casey, in which fictional doctors saved lives.
However, because parents provide both genes and environments for their children, the twins' motivations probably reflect a blend of both.
The
twins' separate medical programs led to their only major career
difference: their medical specialty. (Judith studied cardiology, Julie,
cardiovascular and thoracic surgery.) But both told me that their
medical areas are reflections of their mentors' interests and that
each could easily imagine doing what the other sister does.
Personality
parallels as well as similar skills seem to be driving the twins.
Both work in their offices and laboratories from early morning until
evening. Both twins chose not to have children, opting to care for
cats instead. Some people might prefer a less frenetic lifestyle, but
the twins thrive on this schedule. Clearly they chose careers
commensurate with their outstanding intellect, boundless ambition
and unlimited energy. (They both set aside time on weekends for sports activities, especially golf and polo.)
Julie's
remark, "If we were farmers, we would be good farmers," is worth a
second look. I believe she meant that both twins would do the best
job possible regardless of the job. I agree, except that the job
would have to fit the drive and direction that is essential to both
twins' satisfaction. It may be no accident that the Swain sisters are
not farmers.
Twist of Fate
Most people do not know that a twin walked on the moon. On April
16, 1972, identical twin Charlie Duke Jr. departed the Earth's
atmosphere as a lunar module pilot on Apollo 16, becoming the 10th
individual to reach the moon's surface five days later. While
Charlie was in transit, his family was allowed into mission
control. When his brother Bill entered the medical laboratory, several
staff members who did not know Charlie was an identical twin were
shocked, believing he was thousands of miles away and hurtling ever
deeper into space.
Why wasn't Bill buckled in along-side his
brother? While it may be only part of the story, one physical
difference between the twins had crucial consequences for their
early development, twin relationship and professional goals:
Bill was born with a heart defect. His shortness of breath and
reduced exercise tolerance precluded his participation in active team sports.
He also believes that his restricted physical activity and frequent
medical visits explain his desire to become a physician.
The case of Charles and Bill Duke demonstrates that a major
environmental event can alter genetic predisposition, leading twins to
very different career
paths. Bill's inability to join Charlie in athletic pursuits casts a
shadow on their twinship. Bill resented being restricted from
sports events and sensed parental favoritism toward his more
physically fit twin. Their relationship included close moments, but was
marked by friction.
I was fascinated by Charlie and Bill as
twins because their apparent differences in occupation and life
events disguise their fundamental similarities in intelligence and personality.
Both twins obtained top grades in their (separate) high schools.
They see themselves as "inquisitive, studious and goal-oriented,
dedicated to doing the best job possible."
Charlie says he
could imagine doing what his brother does because being a doctor
would be "interesting and rewarding." Bill, on the other hand,
realizes that his condition "colored" his world, making it "hard to
say" if he might otherwise have joined his twin in space.
Same Nurture; Different Nature
Fraternal twins (who share approximately half their genes)
present an informative contrast. Because they are raised in the
same environment but are not genetically identical, they help us see
the influence of environmental factors. David and Bill Koch are a
marvelous lesson in just how modest family influences can be.
Brown-haired
David Koch is a chemical engineer and executive vice-president of
Koch Industries, the second largest closely held company in the
United States. The diversified company, founded in 1940 by his
father, operates oil refineries, manufactures chemicals and refining
equipment, and owns large cattle ranges. David's fraternal twin,
strawberry-blond-haired Bill, also had been involved in the company
until business disagreements led to a series of courtroom battles
between the brothers.
David and Bill Koch were born in 1940
in Wichita, Kan. Their behavioral differences emerged early. David
was gregarious and athletic, Bill withdrawn and awkward; David was a
good student from the start, Bill blossomed in high school and
college; David's interests in people and activities were
"mainstream," Bill's were "unusual." The boys competed in many ways,
often engaging in unhealthy conflicts.
The twins' college years
at MIT were their friendliest. Both majored in chemical engineering,
like their father had; both joined the same fraternity and lived at
the fraternity house; both also played college basketball. By 1963,
both had received their master's degrees and by 1971, both were
working for the family firm. But by 1980, they were no longer
speaking—a far cry from the intimate and ongoing bond that many
identical twins share. "We could not be more different in our
behaviors, personalities and interests," David said. "If the
environment has a major influence we should be similar, but we are
more different than alike."
Some people eagerly anticipate their
daily work activities, while others spend hours watching the clock.
Some people are a blend of the two, embracing certain aspects of
their job and avoiding others. If we are dissatisfied with our work,
it could be that our genetically influenced predisposition
conflicts with the content and rewards of the job. If we want to be
happy with our career, twin studies strongly suggest we pay close
attention to our inner yearnings.
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