In addition to documenting journalists who are killed, imprisoned, or missing in action, the CPJ produces an annual report called "Attacks on the Press" that summarizes assaults on press freedom in individual countries.
A project between Harvard's Business School and their Institute for Quantitative Social Science. It's goal is to gather research on news media to find ways to "rebalance truth, privacy and power in the media industry". Includes indexes of Media ownership and even political contributions by media owners/outlets.
Latest studies by the Project for Excellence in Journalism