Measuring your audience is one thing. Measuring your impact as a journalist is definitely another. Modern technology enables better quantitative and analytical tools, conceivably offering better ways to evaluate the results of journalism. But it’s possible to devise a way to more concretely — albeit still imperfectly — define what impact means. We could borrow from, use, adapt or learn from science, baseball, non-profits, social entrepreneurship, even car manufacturer websites and pharmceutical drug trials.