Economic issues, particularly the housing market, topped the list of the most-shared news links by bloggers, while the rescue of the formerly trapped miners from the northern Atacama desert in Chile accounted for the most Tweeted news links, and the most-watched news and politics video on YouTube was an unannounced visit to a London school by actor Johnny Depp after he received a letter from one of its students, according to the Pew Research Center’s Project for Excellence in Journalism’s New Media Index for the week of Oct. 11-15.

The home mortgage crisis, fraudulent foreclosure procedures, and other economic issues made up 22 percent of news links shared via the blogosphere, followed by: a column by Professor Jerry A. Coyne from the University of Chicago in USA Today, which argued that science and faith cannot coexist, also at 22 percent; education, including the resignation of Washington, D.C. public-schools chancellor Michelle Rhee, at 18 percent; coverage by the Los Angeles Times of the first CicLAvia event, which turned some of Hollywood’s most-trafficked streets into a pathway for pedestrians and bicyclists, at 9 percent; and the Chilean miners, also at 9 percent.

The rescue in Chile accounted for 37 percent of news links shared via Twitter, and it was followed by: two Apple stories from Mashable — one about its trademark application for the phrase, “There’s an app for that,” and the other about an $8 million diamond-clad iPhone — at 12 percent; the option of one-time passwords for Facebook users as a security measure on public computers and speculation that the social-networking site will add more options to its communication features, including threaded comments and voting, at 11 percent; Toronto-based social-media-analytics company Sysomos’ analysis of 1.2 billion Tweets, which found that 71 percent of them are ignored, at 7 percent; and the very first press release about Microsoft Windows, from 1985, at 6 percent.

Depp’s school visit was followed on the list of the most-viewed news and politics videos on YouTube by: a book being thrown at President Barack Obama during a rally in Pennsylvania; Florida Gov. Charlie Crist throwing out the first pitch (poorly) prior to a Tampa Bay Rays American League Division Series game; a video from German comedy group Die Aussenseiter; and ABC News reports about a UFO sighting over an airport in China.