Ben Sisario, writing for The New York Times:

Now Billboard and Nielsen SoundScan, the agency that supplies its data, will start adding streams and downloads of tracks to the formula behind the Billboard 200, which, since 1956 has functioned as the music world’s weekly scorecard. It is the biggest change since 1991, when the magazine began using hard sales data from SoundScan, a revolutionary change in a music industry that had long based its charts on highly fudgeable surveys of record stores.

It’ll be interesting to see how music streaming services will affect the position of recent and older songs in the charts. Here’s how the system will work:

SoundScan and Billboard will count 1,500 song streams from services like Spotify, Beats Music, Rdio, Rhapsody and Google Play as equivalent to an album sale. For the first time, they will also count “track equivalent albums” — a common industry yardstick of 10 downloads of individual tracks — as part of the formula for album rankings on the Billboard 200.

Given speculation that Beats Music will be bundled in iOS starting next year, it looks like Apple will have an even bigger influence on the Billboard 200.