2nd Year Student TAs Grading?

I'm not sure how it is in other schools, but at Johnson this is fairly normal practice for all of the core classes. I will also so that TA selection and grading is something that is fully dependent on the discretion of the professor of the course. Some professors will choose to grade exams and assignments themselves (which is impressive considering that core classes have almost all 270+ students enrolled), but many will rely on TA's with a framework or template on how to grade. The TA's will generally be MBA students that performed extremely well in the class or in some cases PhD students and for every graded assignment or exam, professors are required to allow students an opportunity to refute grades if they believe they were graded unfairly. In general, the core classes are the ones with MBA TA's and I know that all of them were at the top of the class in that particular course. Also, for any answer that is subjective, there will always be someone that finds a reason to refute the grading regardless of who graded. That's why there's always an opportunity to discuss the grading with the professor directly.

Lastly, I think that at the schools that don't have grade non-disclosure (Johnson is unfortunately one of them), too many people focus on grades especially when they don't really matter. For the most part, as long as you don't fail, employers don't care about gpa's. There are obviously exceptions to this, but in my opinion competency can be demonstrated in many other ways (such as answers to technical or case questions during interviews) and time spent stressing out about an "unfair grade" given by a seemingly "unqualified" TA is better spent networking with companies or bonding with classmates. The returns on that (although seen much later) will far outweigh returns seen on the handful of points you think you were unfairly judged on.