Feroz, E., L. Raab, R., Schultzc, J., & T. Ullebergd, G.
(2017).
"Obamacare and environmental production efficiency rankings for the 50 U.S. state governments: A Data Envelopment Analysis of health outcomes from environmental factors and state health care expenditures.".
Journal Of Economics And Banking, 3(1).
doi:10.18103/jeb.v3i1.822