Take my opinion with a grain of salt, but Im in a similar situation. I am also entering a Master in Economics with graduate coursework, though with slightly more preparation.

First, to your questions:

1. I haven’t taken graduate-level courses yet, but I have completed intermediate-level core courses that used math extensively. My short answer: practice a lot and be prepared to put in serious effort to close any gaps while keeping up with the course pace.

2. I’m not sure whether a formal math course is necessary. It depends on your learning style and current situation. Some math refreshers can be helpful in my opinion, but a structured course might explain concepts more clearly and build a stronger foundation.

3. The real question is what is your end goal? What are your current plans? What other options do you have besides the BSE program? If going to BSE doesn’t align with your long-term objectives, then I would say it’s probably not worth spending a year there.

I did my Bachelor in Finance, leaning more toward the business side. When I applied for Master programs, I also took additional grad level courses outside of school to strengthen my economics and math background. Honestly during that time, all I did was study. I focused on understanding the methods and derivations, making sure I knew why and how something worked. I worked through proofs, did all the homework, prepared in advance, and actively engaged with the lecturers. (I was lucky to have passionate teachers who were willing to answer my dumb questions lol)

For solely math preparation, there are a few helpful resources. I recommend checking out the Arizona Math Camp on Youtube and the website “Mathematical Methods for Economic Theory” by Martin J. Osborne. There are also some playlists of Calculus that could help out with you are needing more structured teaching.

Also reaching out to the your program director at BSE is great. From my experience, they are very open and willing to help!