FAIR has a new study out examining the sources used/interviewed on NPR. They analyze an overwhelming reliance on official/elite sources (as well as corporate media journalists as common sources), gender trends in sourcing (approximately 80% male), and take on the assumption that NPR has a definite liberal bias.
"Despite the commonness of such claims, little evidence has ever been presented for a left bias at NPR, and FAIR’s latest study gives it no support. Looking at partisan sources—including government officials, party officials, campaign workers and consultants—Republicans outnumbered Democrats by more than 3 to 2 (61 percent to 38 percent). A majority of Republican sources when the GOP controls the White House and Congress may not be surprising, but Republicans held a similar though slightly smaller edge (57 percent to 42 percent) in 1993, when Clinton was president and Democrats controlled both houses of Congress. And a lively race for the Democratic presidential nomination was beginning to heat up at the time of the 2003 study.
Partisans from outside the two major parties were almost nowhere to be seen, with the exception of four Libertarian Party representatives who appeared in a single story (Morning Edition, 6/26/03).
Republicans not only had a substantial partisan edge, individual Republicans were NPR’s most popular sources overall, taking the top seven spots in frequency of appearance."
Link: How Public is Public Radio?