The increasing cost of Maine’s top-tier colleges has drawn criticism, but administrators say the tuition rates are a reflection of increased expectations. “‘There’s been a complicated market phenomenon driving these prices,’ says William ‘Bro’ Adams, president of Colby College in Waterville, where the sticker price for tuition and room and board is $50,320. ‘Places like Colby and other top-tier colleges and universities have been adding programs, adding facilities — and generally very much in response to consumer expectation and demand.'”