
Michael ’t Sas-Rolfes is a sustainability economist, with unique experience and understanding of the role of markets for biodiversity conservation.
For the past 25 years, he has been actively involved in various private conservation initiatives, starting as a financial manager of a private game reserve in South Africa. Mike conducted pioneering research into the role of private markets for wildlife conservation in Southern Africa, and worked with Francis Vorhies in setting up Eco Plus, an innovative consultancy on business, economics and the environment. His consulting experience includes work on issues as varied as energy policy, environmental impact assessments, trans-frontier conservation areas, wildlife trade policy and institutional reform in protected area management.
He has written extensively on various conservation issues, especially relating to trade in endangered species, and has been involved with teaching and supervision of students. Mike has also worked and published with several think tanks, including the Free Market Foundation (South Africa), Institute of Economic Affairs Environment Unit (UK), International Policy Network (UK) and the Property and Environment Research Center (PERC), where he was a 2011 Lone Mountain Fellow.

Founded 30 years ago in Bozeman, Montana, PERC—the Property and Environment Research Center—is the nation’s oldest and largest institute dedicated to improving environmental quality through property rights and markets.
PERC’s publications, each designed to resonate with specific groups, move ideas generated at PERC to broader audiences.
Research is at the heart of PERC's work, with a focus on the question: What is the link between economic growth and environmental quality?
The goal of PERC’s programs is to fully realize the vision of establishing “PERC University,” where scholars, students, policy makers, and others convene to expand the applications of free market environmentalism.
PERC's fellowships share a common goal of exposing new scholars, students, journalists, and policy makers to free market environmentalism, as well as enable scholars already familiar with FME to explore new applications.
PERC continues to publish and present a broad range of research and discussion through podcasts, videos, and other multimedia channels.