Efficiency margin: points per possession (PPP) minus opponent PPP (more about these stats) Thru December 27 1. Illinois (+0.28) 2. Indiana (+0.25) 3. Ohio State (+0.21) 4. Wisconsin (+0.19) 5. Michigan (+0.18) 6. Iowa (+0.17)7. Minnesota (+(0.12) 8. Michigan State (+0.12) 9. Penn State (+0.10) 10. Northwestern (+0.04) 11. Purdue (-0.02)