Efficiency margin: points per possession (PPP) minus opponent PPP (more about these stats) Conference games only, thru February 12 1. Ohio State (+0.15) 2. Wisconsin (+0.11) 3. Illinois (+0.08) 4. Michigan State (+0.07) 5. Iowa (+0.05) 6. Michigan (-0.01) 7. Indiana (-0.05) 8. Minnesota (-0.06) 9. Northwestern (-0.07) 10. Purdue (-0.10) 11. Penn State (-0.14)