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Ask professors from Harvard, Princeton, NYU, Cornell, Oxford, and more about the subjects they teach. Each one answers from their own lectures, papers, and books.

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Tom Eisenmann

Professor at Harvard Business School and co-chair of HBS Foundry

Author of Why Startups FailTeaching at HBS ~3 decades

Why themNames the failure patterns that threaten startups.

What major should I choose?

I don't think the major matters nearly as much as the problems you learn to wrestle with. Our best founders came from engineering, design, history, and dropped out of plenty of things; what they shared was a habit of building stuff with other people before they graduated.

How asking a professor on Delphi works

Each professor here has a Delphi, a Digital Mind built from their own lectures, papers, books, and talks. You ask in your own words, by text or voice, and it answers the way they would.

Start with a subject: why startups fail, how people read each other at work, or what tax data says about who owns businesses. Then ask follow-ups like you would in office hours.

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See how a Harvard entrepreneurship professor, an NYU psychologist, and an Oxford economist answer the same question.
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Questions people search for

Answered by people who've lived them.

What major should I choose?

Pick the subject that holds your interest through the dull parts and keeps giving you questions. Most of these professors put less weight on the major's label than on what you do with it: the projects you build, and a professor who pushes you.

  • Tessa WestTessa WestProfessor of Psychology at NYU who studies how people communicate at work

    I wouldn't pick a major because it pays well or seems safe; I'd pick the one where the day-to-day work still interests you when you're doing the boring parts. I chose psychology because I couldn't stop watching how people read each other, not because I had a plan.

    Ask Tessa a follow-up
  • Vanessa BohnsVanessa BohnsSocial psychologist and Chair of Organizational Behavior at Cornell ILR

    I was an AB in psychology at Brown, but my real turn came later, in grad school, when I started sending people into Penn Station to ask strangers for favors and realized I was more interested in how people actually influence each other than in any one label. Pick the major that gives you questions you cannot stop thinking about, because the job you will do in ten years probably does not exist yet.

    Ask Vanessa a follow-up
  • Shai BernsteinShai BernsteinProfessor at Harvard Business School focused on entrepreneurial finance and innovation

    I studied economics because I wanted to understand how markets shape decisions; in my own research, personal interest and strong mentors turned out to be the dominant drivers of durable career paths. Pick the major that makes you lose track of time, then find a professor in that department who will push you.

    Ask Shai a follow-up

What is the best way to study?

Swap rereading and highlighting for work that makes you respond: quiz yourself, explain an idea out loud, or write answers against a clock. Several of these professors say studying with other people helps, and Ellen Langer says finding new angles in the same material helps you remember it.

  • Tom EisenmannTom EisenmannProfessor at Harvard Business School and co-chair of HBS Foundry

    Stop rereading and highlighting; it feels productive but mostly creates fluency illusions. I’ve seen students learn more from a quick self-quiz or by explaining an idea out loud to a peer than from hours of passive review.

    Ask Tom a follow-up
  • Tyler CowenTyler CowenEconomist at George Mason University and chair of the Mercatus Center

    For hard books I read the first fifty pages three times, skip what bores me, and reread the whole thing once without judging, then again with some map of where it's going. The real trick is forcing yourself to write out answers under a clock, the way Kotov taught me to study chess, rather than nodding along and thinking you already got it.

    Ask Tyler a follow-up
  • Ellen LangerEllen LangerSocial psychologist at Harvard who has researched mindfulness for over 45 years

    Stop treating study as memorization and start treating it as noticing. In our studies, the more new distinctions people found in the same material, the more they remembered and enjoyed it. So vary your angle, ask why it could be otherwise, and let curiosity do the work that willpower usually fails at.

    Ask Ellen a follow-up

Is college worth it?

Most of these professors say it can be, depending on what you get from it: access to people, tools, and a specific door you need. Tessa West says the major matters more than the degree. Tom Eisenmann says the credential is a weaker signal than most people think, and Jeff Bussgang says the debt is hard to justify without a network, judgment, or a door it opens.

  • Tom EisenmannTom EisenmannProfessor at Harvard Business School and co-chair of HBS Foundry

    I surveyed 470 founders for Why Startups Fail and found no correlation between an elite degree and startup success, and none for an MBA either. College can buy you access and credibility, but it can also fund a bad idea longer; the signal on a resume is weaker than most people think.

    Ask Tom a follow-up
  • Jeff BussgangJeff BussgangGeneral Partner at Flybridge Capital and professor at Harvard Business School

    College paid off for me because it plugged me into the people and ideas that shaped my career, but the ROI is collapsing for many. If you're not getting network, judgment, or a credential that opens a specific door, the debt is harder to justify than ever.

    Ask Jeff a follow-up
  • Shai BernsteinShai BernsteinProfessor at Harvard Business School focused on entrepreneurial finance and innovation

    I studied at Harvard for my Ph.D. because it opened doors to the research questions I cared about, not because the credential itself was the goal. College pays off when it gives you access to people, tools, or signals you cannot get cheaper elsewhere; otherwise the return is harder to justify.

    Ask Shai a follow-up

How do you become a college professor?

The usual route is a PhD, sometimes a postdoc, then assistant professor jobs and a run at tenure, which Tom Eisenmann calls a tournament. Business schools also hire from industry: Jeff Bussgang and Shikhar Ghosh came to Harvard Business School after building companies.

  • Tom EisenmannTom EisenmannProfessor at Harvard Business School and co-chair of HBS Foundry

    I came to HBS after a decade at McKinsey, and the path is a tournament: maybe one in three PhD applicants get a shot, and only one in four assistant professors make tenure. I nearly didn't survive my first few years here, so the credential is less the degree than proving you can keep producing research and teaching that holds up.

    Ask Tom a follow-up
  • Tessa WestTessa WestProfessor of Psychology at NYU who studies how people communicate at work

    I got my BA at UC Santa Barbara, my PhD in social psychology at UConn, and then I applied for faculty jobs straight out of grad school. In my field, you either get hired right after the PhD or do a postdoc first, and the only way to know which path fits your area is to ask people already in it.

    Ask Tessa a follow-up
  • Vanessa BohnsVanessa BohnsSocial psychologist and Chair of Organizational Behavior at Cornell ILR

    I got here by doing a PhD at Columbia, then a postdoc at Rotman to shift from psychology into organizational behavior, then assistant professor jobs at Waterloo and Cornell. The path is less straight than the CV makes it look.

    Ask Vanessa a follow-up

How do you write an email to a professor?

Keep it short: a clear subject line, one sentence on who you are, and one specific ask. Say why you're writing to this professor and show you've done some homework. Tessa West adds that proposing a time window gets a reply where asking for thirty minutes whenever doesn't.

  • Tom EisenmannTom EisenmannProfessor at Harvard Business School and co-chair of HBS Foundry

    I get a lot of cold emails, and the ones I answer make it easy fast: a clear subject line, one sentence on who you are, one sentence on what you want, and a specific ask with a time commitment. Skip the resume and the flattery. If you share a connection or mention a specific paper or case I wrote, that helps. Keep it above the fold and proofread the name.

    Ask Tom a follow-up
  • Tessa WestTessa WestProfessor of Psychology at NYU who studies how people communicate at work

    Keep it under five lines, say exactly what you need and by when, and skip the emergency tone. I ignored emails that begged for just thirty minutes whenever, but I answered the ones that proposed a specific time window.

    Ask Tessa a follow-up
  • Alison Wood BrooksAlison Wood BrooksBehavioral scientist and professor at Harvard Business School

    I tell my students to make it shorter than they think: a clear subject line, one sentence of context, and a specific ask. Professors are drowning in email, so bullet points and a precise subject help both of you.

    Ask Alison a follow-up

Who answers

All 12, in one list.

Questions

Which subjects can I ask about?

Entrepreneurship, psychology, and economics for now, with more subjects coming.

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