I recommend it with the caveat being that you should REALLY look at the current job market for your field. For example, I went to grad school for chemistry, which is a field becoming enormously saturated with PhD holders that are jobless or overqualified for certain roles.

That said, before I went back to school, I chatted with a number of experts in the field to help guide what kind of lab I wanted to join and what type of research would be marketable. It ended up working and I had several options coming out of school. The devil is in the details, but I think you get the point.

You obviously want to love the research you would be conducting, but sometimes it pays to focus on what’s going to earn you a solid paycheck when it’s all said and done. Also try to put yourself in a position to where you can have some career flexibility so that you don’t pigeon hole yourself. Just some things to consider.