Our "rule" is that kids living at home not at school need to either have a job or be actively looking for a job. If looking for a full-time job after school, I would say that if a full-time job isn't food in a reasonable period (a couple of months), that a part-time job should be taken that wouldn't interfere with interviewing (deliveries pizzas, weekend work, etc.).
As for "rent", once a job is obtained, my position is that I don't charge rent but I would charge an amount equal to the out of pocket cost of having the adult child at home. So, some amount to cover extra utilities and cost of food. I would expect the adult child to cover his/her other expenses such as clothing, gas, auto insurance, health costs, etc. Obviously until a job is obtained there really isn't a way to collect on those costs.
As far as the daughter's situation, I don't necessarily think it is a big deal not to have found a job yet. I do tend to agree that the problem may be the major. I wonder if your daughter really assessed career possibilities before getting the degree. Do her friends who have jobs have the same major or perhaps other more marketable majors? What is it that your daughter wants to do with the degree? Why that degree?
I wouldn't have her just go to graduate school if she doesn't have a realistic plan of how going to graduate school will benefit her career prospects? On the other hand, if she made a bad choice of major (and I don't know if she did) then a relatively short program in something else might work. But, on the other hand, it might not make sense to go back to school for another several years just because she hasn't found a job in 2 months if her major is viable.
