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I'm planning to apply to phd programs in economics and I'm hoping to eventually work in academic research on economic theory, social choice theory, welfare economics or related areas. I'm wondering if doing a masters in math before applying to an economics phd would be worthwhile? Seems like it might be nice to have the math stuff down really solid, so I can focus on economics in grad school.

By the time I finish undergrad (in U.S.), I will have taken the following math courses (one semester each): Multivariable calc, linear algebra, abstract algebra, real analysis, topology, optimization, probability-statistics, basic numerical analysis with matlab, differential equations. Econ courses that I'll have taken: year of micro, year of macro, year of econometrics, year of graduate micro.

Edit: My undergrad major is philosophy and also a joint major math-economics.

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  • $\begingroup$ Probably not, unless you want to do one. Measure theory would be useful. And if you want to do networks, graph theory would be a nice to have. My background in math is comparable to yours and I went through a lot of the graduate micro theory and game theory at my home institution. I found myself ahead of the game in my grad Econ classes. $\endgroup$ – ml0105 Mar 19 '16 at 3:54
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    $\begingroup$ Having math master would help one digest grad level economics, for sure. Is it worthwhile? Depends. Is time and money an issue? Personally, I think it's better to get through University as fast as possible. Why faff around? There are many good PhD econs without masters (at all!), so why create a wandering path? Better would be to aim high in undergrad math and let that fall into place in your econ course. A top EU PhD econ course has math/stats notes here. It's done in couple weeks. Not difficult. $\endgroup$ – Graeme Walsh Mar 19 '16 at 13:54
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    $\begingroup$ You haven't said what is your undergraduate studies. It doesn't look like they are in economics. $\endgroup$ – Alecos Papadopoulos Mar 19 '16 at 15:12
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The following answer is based mostly on gut-feeling and I urge you to read some of the papers found in the last section to base your decision on something quantifiable.

Coursework (-) Having an additional degree in math will be completely irrelevant in the coursework, where your current courses will be sufficient preparation. Indeed, a game theory/advanced econometrics summer course may be more useful as preparation.

Thesis Advisor (+) The degree will make it easier for you to find an advisor who is willing to invest time in working with you. If you move from a philosophy/math/economics undergrad degree into a top-school economics Ph.D. you will most likely compete for the attention of supervisors with students from Europe and Asia who already have Master's degrees in some field. Some research from the last section of my answer suggests that in most departments a lot of resources are spent on the very best students.

Research (+++) The math degree will be helpful in your research. From the fields you listed as your interests a Master's degree in math does not seem like a bad idea. All fields mentioned are very math-heavy and often use math that is not taught at undergraduate level. However, if you later decide to work in other fields such as macroeconomics, your math Master's will not help you much.

Job Market (+) Your decision will also affect your job market prospects. The fields you have outlined have a fairly small job market compared to let's say applied econometrics or macroeconomics. If you do not stand out from the crowd it may be difficult to find a position as assistant professor. Thus, having a math master's may help you write an outstanding job market paper. However, you will be older when you enter the market. For very few employers, this may be a secondary criterion.

Tenure (+) When you obtain an assistant professor position after your Ph.D., you will need to write a number of strong papers within several years. If you at that point need to acquire additional math skills this will slow down your research in this crucial time.

Lifetime income (--) You will most likely lose at least one year of income from doing the degree. If your degree is two years or 1.5 years, you may at most be able to make up for one year via a shorter Ph.D. by being more productive. It is not unlikely that you will lose 2 years of income. However, doing the Master's may allow you to enter better Ph.D. programs, write better papers, and achieve a better job placement, earning you more money. But this effect is hard to estimate.

Readings Be sure to check this website to make the right strategic decisions. There is a lot of research on what makes Ph.D. students in economics successful.

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