Murphy is research assistant professor with the Free Market Institute at Texas Tech University.[3] He has been a visiting assistant professor at Hillsdale College, and a visiting scholar at New York University. He has been affiliated with Laffer Associates, the Pacific Research Institute,[4] the Institute for Energy Research (IER) as the senior economist focusing on climate change,[5] the Independent Institute,[6] the Ludwig von Mises Institute,[7] and the Fraser Institute in Canada.[8] He is the president of Consulting By RPM. In September 2021 Murphy was ranked as the 11th most influential person in economics[9] by Academic Influence which uses "artificial intelligence to measure impact by academics and institutions."[10]
Murphy has written books such as Choice: Cooperation, Enterprise, and Human Action (Independent Institute, 2015),[11]Primal Prescription with Doug McGuff, MD regarding healthcare in the United States,[12] and Lessons for the Young Economist (Mises Institute 2010).[13] He has written study guides to works of Ludwig von Mises and Murray Rothbard.[5] Murphy authored the 2007 book The Politically Incorrect Guide to Capitalism. Murphy's book, The Politically Incorrect Guide to the Great Depression and the New Deal, published in 2009, blamed the Depression on government policies.[14][non-primary source needed]
In 2013 Murphy challenged Krugman to a debate and unnamed supporters of Murphy promised to donate $100,000 to a charity if Krugman would debate Murphy on economic policy issues.[29] A promotional website was established for the challenge. In response to a radio show caller, Krugman rejected the proposed debate, saying that the subject “is not something to be settled by public circuses" and added, "Why should I dignify that totally-wrong doctrine — that doctrine that's gotten everything wrong — by giving them a platform?", pointing to the erroneous inflation predictions.[30][b][31]
Religious views
Murphy is a Christian, and has stated in his writings that "my ethical beliefs are informed by my Christian faith, and I am a firm believer in natural law".[32]
Books
Chaos Theory (2002) – Two essays on anarchocapitalism; one discussing the production of defense services, and the other describing the provision of private criminal and civil justice.
How Privatized Banking Really Works – Integrating Austrian Economics with the Infinite Banking Concept (2010) co-written with L. Carlos Lara. ISBN978-0615326825
The Primal Prescription (2015) – Co-authored with Dough McGuff, MD. The authors utilize their expertise in economics and medicine to examine America's health care system.