president jean claude trichet said he thinks economic growth will remain modest as the continent works to fix its debt problems. >> jeff: still ahead, in tonight's "of mutual interest," all that glitters is not always gold. especially when it comes to investing in e.t.f.'s. john waggoner, mutual fund columnist at u.s.a. today, joins us to explain. >> suzanne: july was a lackluster month for many of the nation's retailers, as they relied on heavy discounting to move leftover summer merchandise. the reuters same-store sales index rose almost 3%, slightly less than expected. if you think back-to-school shopping is all about the k-12 crowd, you're wrong. twice as much money is spent on college students, $40 billion a year. college freshman are usually the cash cows, but this year's incoming class plans to spend 20% less than last year's. erika miller looks at why that is, and the implications for retailers. >> reporter: chanel simmons on the left, and her friend symone martin, are this season's v.i.p.'s: very important purchasers. both are college freshmen, the group of students that spend