There isn't much in the way of recent articles. I just did a quick journal search through JSTOR, and the majority of recent stuff refers to D&D only obliquely - through studies of online immersive
rpgs. A LexisNexis search on newspapers (English lang. only) also mentions D&D mostly in reference to online games and by way of biographical detail on personalities (e.g. "Mr x used to play Dungeons and Dragons as a kid, but now blah blah blah..."). As a paper and pencil phenomenon, not much out there now.
Although I did spot a profits warning from Games Workshop dated Jan of this year
