I prefer to think of economics as a "way of thinking" rather than a set of tools, but both formulations emphasize the breadth and generality of the discipline.
The interviewer is Emily Chiu, ace honors undergraduate and, like yours truly, an afficianado of Harold's Chicken Shack in Hyde Park.
Addendum: link fixed - hopefully I get a kickback from the CEA for sending people to their conference website for a few hours.
What is missing from the write-up is impacts on health outcomes. The other thing that is missing is a cost-benefit analysis.
There are also external validity issues. I don't know about the other two study sites, but Harborview is Seattle is a high end medical center. Things might be different at, say, an urban hospitial serving a lot of Medicaid patients.
More broadly, the study is one more reminder of the astounding backwardness of medical IT.