Just saw this, world university rankings for 2015... Big Ten schools listed below
http://www.shanghairanking.com/ARWU2015.html
Michigan - 22
Wisconsin - 24
Northwestern - 27
Illinois - 29
Minnesota - 30
Maryland - 43
Penn State - 60
PURDUE - 61
Rutgers - 64
OSU - 67
MSU - 99
IU - 101-150 Tier
Iowa - 151-200 Tier
Nebraska - 201-300 Tier
http://www.shanghairanking.com/ARWU2015.html
Michigan - 22
Wisconsin - 24
Northwestern - 27
Illinois - 29
Minnesota - 30
Maryland - 43
Penn State - 60
PURDUE - 61
Rutgers - 64
OSU - 67
MSU - 99
IU - 101-150 Tier
Iowa - 151-200 Tier
Nebraska - 201-300 Tier