The life cycle of a business consists of four phases”. Each phase has its own special features and challenges. All successful businesses will go through these phases more than once. I was expecting just that going to grad school (I studied a lab science as a UG and didn’t know a single econ major), but I found the other students to be plenty collaborative. We did weekly study groups, emailed each other our homeworks to compare and discuss answers, and generally commiserated and supported one another. A few people went to great lengths to help others, which was good for me at first because I went there knowing little math.