Older users are more likely to click through Facebook advertisements, whereas younger ones are more apt to "like" fan pages, the study said. Users over 50 were 23 percent more likely to click through an ad than all younger age groups, according to the study. Compared with the highly coveted 18 to 29 age group, that percentage rises to 28 percent. The 50-plus group, which was the oldest group included in the study, was also about 9 percent less likely to "like" a page than any other group. Get the full story at Clickz