Dubious list to be on. Of course NU is one at # 18. What is remarkable to me is how close their costs are to each other. The lowest cost of the 30 is just $61,070. while NU at 18 is at $61,640. Most expensive is Harvey Mudd at a little over $64,527 (# 2 is about $63.6K). Like I said, some form of collusion in that all are about the the same price. Notice that Harvard, Yale, Stanford are not on the list but you know they are close in cost.
http://www.shockpedia.com/30-expensive-colleges-america/
http://www.shockpedia.com/30-expensive-colleges-america/