Doctor incentives for stroke

What are the incentives for your doctor or stroke hospital to keep up with the latest research?
Cash?
Don't want to fall behind other doctors?  Herd mentality?
Don't want to be shown up by patients?

This is a major problem because I really doubt your doctor has changed any stroke rehabilitation stuff(not ER work) based on research in the last 30 years. Any doctor can prove me wrong and gloat about it. 
What would incentivize your doctor to keep up with the latest?