Math and Economics

I don’t know if there is a news mag­a­zine called The Math­e­mati­cian, but there is one called The Econ­o­mist, and it’s read by econ­o­mists, pol­icy mak­ers, and mil­lions of oth­ers every week (math­e­mati­cians included). The title of the mag­a­zine speaks to the cru­cial role that eco­nom­ics plays in policy-making, busi­ness, and other fields today. And though it may seem that econ­o­mists sim­ply like to bicker over arcane ideology–neo-monetarists always bat­tling neo-Keynesians–that’s largely not the case. Instead, eco­nom­ics is a wide, rich, and grow­ing field ded­i­cated to solv­ing real-world prob­lems. Plus, eco­nomic the­ory and data analy­sis is dri­ven by math. So what’s not to like?

Math majors often find it easy to study eco­nom­ics on the side, and a few Prince­ton math majors every year end up in eco­nom­ics grad­u­ate school or con­duct­ing eco­nom­ics research. Math majors who go into eco­nom­ics are often seen as tech­ni­cally com­pe­tent and able to pur­sue inter­dis­ci­pli­nary research.

Although Prince­ton does not offer a cer­tifi­cate in eco­nom­ics (the cer­tifi­cate in finance is not the same thing), there are a few classes that grad­u­ate schools and employ­ers will look for. Specif­i­cally, grad­u­ate schools require:

  • ECO 310: Math­e­mat­i­cal Inter­me­di­ate Micro­eco­nom­ics. Stu­dents can take this course with­out hav­ing taken intro­duc­tory microeconomics.
  • ECO 311: Math­e­mat­i­cal Inter­me­di­ate Macro­eco­nom­ics. Ditto.
  • ECO 312: Math­e­mat­i­cal Econometrics.

Beyond the required courses, though, stu­dents have wide lat­i­tude in choos­ing their courses. Other rec­om­mended courses are:

  • Sta­tis­tics: ORF 245 or POL 345. The AP Sta­tis­tics test is ade­quate, as is self-study.
  • Prob­a­bil­ity: highly rec­om­mended for math-econ stu­dents. ORF 309, MAT 390, or, if you’re feel­ing ambi­tious, ORF 526.
  • Pro­gram­ming: COS 226 or COS 323. Eco­nomic research is becom­ing more and more tech­ni­cal and computer-science oriented.

Admis­sion to com­pet­i­tive eco­nomic grad­u­ate schools depends on sev­eral fac­tors other than your grades in the above courses. Equally impor­tant are let­ters of rec­om­men­da­tion, research back­ground, GRE scores, and grad­u­ate courses.

  • Let­ters of rec­om­men­da­tion: Prince­ton has many top eco­nom­ics pro­fes­sors; grad­u­ate schools will want to see at least one let­ter of rec­om­men­da­tion from one of them.
  • Research back­ground: Schools don’t expect math stu­dents to have sig­nif­i­cant eco­nom­ics research under their belt (let alone pub­lished papers), but a junior paper or sum­mer intern­ship in eco­nom­ics will only help. One’s senior the­sis doesn’t nec­es­sar­ily have to be in eco­nom­ics, and choos­ing to work with an eco­nom­ics pro­fes­sor can some­times back­fire since they may also be advis­ing five or more other stu­dents. Some stu­dents choose to spend one or more years post-graduation work­ing in eco­nomic research before going to grad­u­ate school. A good place to look for such fel­low­ships is at the NBER.
  • GRE: Take a good two weeks off dur­ing the sum­mer to study for the GRE. A good score on the GRE will strengthen your appli­ca­tion. If your grades in math classes are lower than you hoped, you can also take the GRE math sub­ject test (but this isn’t nec­es­sary for most stu­dents). There is no GRE eco­nom­ics sub­ject test.
  • Grad­u­ate courses: some economics-oriented math majors choose to take classes from the core sequence of the eco­nom­ics PhD pro­gram at Prince­ton (Econ 501–502 are micro, 503–504 are macro, and 517–518 are econo­met­rics). This helps for admis­sions but cer­tainly isn’t required (don’t do this if there are more inter­est­ing courses you want to take). One advan­tage is that stu­dents don’t have to repeat the courses if they matric­u­late in Princeton’s PhD program.

Con­tacts
Mohit Agrawal ’11 (magrawal[at]alumni[dot]princeton[dot]edu)

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