Into the department once again in the morning. Worked on the next problem set for regression, while also spending time on my game theory problem set (both due Wednesday). Made a bit of progress before meeting with some of the cohort members to go over the regression homework. Seems we all had some rather general questions about how to approach it. Spent the rest of the day in the office trying to get both problem sets completed and typed. That didn't happen, of course. Still have lots to do.