Jupiter Research found that about two thirds of car buyers do at least some research online, according to Internet Retailer. From 65 percent to 69 percent visit sites to learn more about potential models, about half of the shoppers starting off with no idea what make is best for them. More than a third (35 percent) said that the internet affected which choice they made. Only 22 percent said the internet affected their choice of which dealership to visit to make a purchase, which is consistent with other research on the topic. Jupiter's study pegged the portion of cars actually bought online at a mere 0.5 percent. Released almost concurrently, Borrell Associates said a study it conducted, covered by MediaPost showed that at least half of car buyers start off online.