Over at the New York Times…

Visitors to social media networks and services such as Facebook and Twitter shop more online than those who don’t go to such sites, according to comScore’s latest quarterly overview of the online retail economy, as reported by eMarketer. And in the case of Facebook, comScore’s figures show that the more frequently a user visits the social network, the more he or she spends online — $67 on average for heavy users of Facebook vs. $50 for a “light” user of the network and just $27 on average for a non-visitor (comScore defined a heavy user as anyone in the top 20 percent of visitors to the social network, as measured by time spent on the site).