Public choice is the branch of economics which looks at (mostly democratic) government systems using economic logic ie: the ideas of rationality, utility maximization, and game theory etc.
As a student of economics, this seems like a great way to classify questions. Some questions I think might benefit from such a tag:
I'm definitely new to this community, and I don't want to rock the boat. Is public-choice a reasonable tag to add? Is retroactive tagging acceptable?