Efficiency margin: points per possession (PPP) minus opponent PPP (more about these stats) Thru January 1 1. Illinois (+0.30) 2. Indiana (+0.25) 3. Ohio State (+0.21) 4. Michigan (+0.20) 5. Wisconsin (+0.18) 6. Iowa (+0.17) 7. Michigan State (+0.15) 8. Minnesota (+0.13) 9. Penn State (+0.11) 10. Northwestern (+0.09) 11. Purdue (-0.05)