system
Given the following post, respond as if you're commenting on Reddit:
human
Do you have to double major in math in order to have a high chance of getting into a PhD programme?

Hi there,

I am a high school student planning on studying economics at university. 

I'm passionate about economics and statistics, but based on research, I've seen that an economics degree is better paired with math than stats, and that I should double major in econ and math if I want to get into PhD programmes. However, I haven't practiced calculus/algebra since 2017, as I was in an accelerate class which was two-years ahead.

Can I still get into a PhD programme with high grades and a double major in stats or math, or should I work hard to double major with math? It's not that I don't like math, I just can't imagine doing an entire major in it without having practiced for so long. 

Thanks!
gpt
You can double major in either mathematics or statistics.

You should have the following courses on your transcript:

1. A calculus sequence
2. Linear Algebra
3. Probability (the one with a Calc 3 prereq)
4. Mathematical Statistics (the one with a Probability prereq)
5. Real Analysis (the one that uses Rudin's book)
6. One other upper-level mathematics or statistics course

If you major in statistics, then you're gonna take the first four of those *anyway.* A statistics major is basically an applied math major.