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I just entered a MS in Computer Science in a mid tier state school. I'm interested in taking things to the next level, but I just turned 30. By the time I do the math and everything, I'll probably be 34 before applying. Is that too old? Does that essentially eliminate me from top programs?

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    In Canada (and I guess US) it is illegal to take the age of applicants into account. Also this other question might be of interest
    – Zenon
    Oct 31, 2012 at 22:29
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    in practice, however, business schools do it all the time for their phds. It's very difficult to prove that it was age that caused the rejection, but I've heard from people in business that it is a common problem.
    – rsteckly
    Oct 31, 2012 at 22:31
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    that is really sad, in my experience all older PhD candidates I know are really interesting with their experience and are in no way worse than younger ones. (CS/Math)
    – Zenon
    Oct 31, 2012 at 22:40
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    If most older PhD candidates are better than younger ones, that doesn't necessarily mean older PhDs are better. It might just mean they're discriminated against more, so that their bar for admission is higher. Dec 26, 2014 at 13:13
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    I know two people who retired, eventually got restless, and decided to go for a Ph.D. One was in their late 80s. To which I say: why not?
    – trikeprof
    Dec 25, 2016 at 17:45

6 Answers 6

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Age is simply not a factor in PhD admissions in computer science, at least in North America. As Zenon says, age discrimination is illegal here.

However, being out from school for a significant period of time (say, more than five years) is a potential hurdle for PhD admissions, at least in my department. We typically recommend that those students pursue a MS degree first, to refresh their academic background. But since you're in an MS program now, that shouldn't be a issue for you.

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    This is it. Age isn't a disqualifying factor—time away from school is the problem. Fields can advance a lot in a few years.
    – aeismail
    Nov 3, 2012 at 20:59
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    It may be illegal, but in practice (other than the sensible reason you mentioned), does it in fact make a difference? :\
    – user124384
    Sep 24, 2014 at 0:22
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    No, it really doesn't.
    – JeffE
    Sep 24, 2014 at 2:29
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    I have a problem with the "time away from school" criterion. It presumes that formal, in-school, education is the only way to learn. I started my PhD 27 years after completing my only formal computer science education, a master's degree. I would have been totally lost in the classes if what I knew in 1975 was all I knew about computing in 2002, but it wasn't. Feb 24, 2015 at 20:23
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    @PatriciaShanahan No, it presumes that by default people learn academic topics primarily through formal, in-school, education. Most people would be totally lost in classes 27 years after they graduated. You were clearly not most people, and (given your admission) that must have been clear from your application. Being away from school for many years is a disadvantage, but like any other disadvantage, it can be overcome.
    – JeffE
    Feb 25, 2015 at 0:13
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Apart from admission (which normally should not be related to age), there is something that's related to your question. I'm going to generalize and say that the older one is, the more that person will have financial restraints tied to lifestyle. One tends to be married, to have children, to have a mortgage, to have debts, etc. You may not agree with this generalization, but many students seeking PhDs at my university fall into this category.

In such cases, the problem is more about funding requirements related to lifestyle. Funding opportunities are always limited (regardless of one's age), but it might be harder for someone who has financial obligations to manage with the limited funding for a PhD. I know of several cases of PhD candidates who never started, or (worse) didn't finish because the funding was too limited for them as spouses, parents, homeowners, etc.

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  • I would argue that the ability to cope with the reduced level of income of a PhD stipend is purely a matter for the candidate, not something that should affect an admissions decision. After all, there is no way an admissions committee can know what the cadidate's personal financial circumstances are.
    – Time4Tea
    Oct 16, 2019 at 21:26
  • @Time4Tea It's why I prefaced my answer as such. Oct 16, 2019 at 22:05
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I just want to add that, being a current student in a top 10 CS PhD program, I don't feel that age is a factor even in 'day-to-day' interactions. There are several students in our department who worked in industry or had a career for 10+ years before they decided they wanted to come back to grad school. We all get along fine, those of us in our 20's, 30's even 40s. I'm sure that has a lot to do with training to be scientists. We make a conscious effort to be as objective as possible, and this is one instance where that kind of thinking benefits everybody.

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Age is not a PhD admission facor in the continental Europe, too.

The selection is based on titles, publications, curriculum vitae and generally on what you've done.

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In my field, which is not computer science, we get a number of clinicians who are a few years away from retirement applying for PhDs. NIH institutional training grants track students for a number of years post graduation so accepting people who will retire soon after graduation is bad. Of course these older applicants are never rejected based on age.

The problem arises more for applicants that are nearer 50 than 30 years old.

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In Turkey, age is a very important decisive factor in all types of graduate school admissions and other academic pursuits. Usually, there is an age limit of less than 27, to be eligible for applying scholarships or other types of funding under the title of a student.

Also, Turkish professors are not willing to advise older students, because the structure of the Turkish society requires older people to get married and grow their kids, instead of being a student. As a consequence of this, woman in academia are usually positively discriminated resulting in lower teaching loads and research expectations to be satisfied. This is due to the fact that they could serve as good wives for their husbands, and grow more kids. Almost all woman academics are in this business (in academia), in order to benefit from opportunities to become better housewives and mothers.

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  • I do not understand your last sentence; To what are you referring with this business?
    – Wrzlprmft
    Dec 26, 2014 at 13:20
  • +1 for providing perspective from a different culture from US/European
    – Time4Tea
    Oct 16, 2019 at 21:28

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