Allowing for possible differences in student bodies, those students opting out of government schools through a voucher program on average score better than those who apply for vouchers but do not receive them. (hanushek.stanford.edu)
You read this and you wonder: What possible difference does it make whether the owner is an occupant or the property has been used as an investment for more than 18 months? (fhaloanpros.com)
What possible difference does that environment make; shouldn't the referred to would - be rules and laws apply everywhere? (remonline.com)