Measures the impact that left-leaning blogs have on the conversation among left-leaning blogs. Blogs that score higher on the liberal influence measure than they do on the "Official" measure may have fewer posts the other side considers controversial or simply discuss issues of more interest within the liberal community than to a wider audience.
BlogNetNews' Blogosphere Influence Rating combines a variety of data sets to determine which blogs are most powerfully influencing the direction of the Pennsylvania political blogosphere. The exact method BNN uses to calculate influence scores must remain proprietary in order to prevent attempts to game the system. BNN's methodology takes into account the fact that all Internet data is profoundly limited in its reliability by using multiple data sets that, when combined, reveal a fair picture of activity in the blogosphere.

