Our goal is to put in one place as much original and aggregated data as possible about each of the major journalism sectors.

From the introduction:

Our desire in this study is to answer questions we imagine any reader would find important, to help clarify the strengths and weaknesses of the available data, and to identify what is not yet answerable.

We believe our approach of looking at a set of questions across various media differs from the conventional way in which American journalism is analyzed, one medium at a time. We have tried to identify cross-media trends and to gather in one place data that are usually scattered across different venues. We hope this will allow us and others to make comparisons and develop insights that otherwise would be difficult to see.