The media is biased, but not in the way most commentators think. By focusing on whether the media is harder on Republicans or Democrats, we’ve missed a more important bias: toward things that matter to the rich. This bias, by linking the state of the economy to how the rich are performing, ends up benefiting Republican candidates. Media are subject to a deep availability bias: They write about the things they know and things that interest them and the people who surround them. This ends up giving coverage an upper-class tinge.
Source: salon.com