For the parts of microeconomics and game theory which abut on the decision theory discussed here, I would suggest some of these free online textbooks. Registration required, but is apparently fairly painless—even spam-free.
ETA: One branch of microeconomics that I think is particularly important is “information economics”. In the course of Googling to find resources on this topic, I ran into this useful encyclopedia.
For the parts of microeconomics and game theory which abut on the decision theory discussed here, I would suggest some of these free online textbooks. Registration required, but is apparently fairly painless—even spam-free.
ETA: One branch of microeconomics that I think is particularly important is “information economics”. In the course of Googling to find resources on this topic, I ran into this useful encyclopedia.