Private Sector Conservation Investments under the Endangered Species Act: A Guide to Return on Investment Analysis

The US Endangered Species Act (ESA) protects imperiled species by prohibiting harm to listed species and their habitat. Over the last 20 years, the US Fish and Wildlife Service and National Marine Fisheries Service have developed programs to increase management flexibility under the ESA and to encourage voluntary conservation actions by the private sector — above and beyond what is required for ESA compliance. These programs include Candidate Conservation Agreements, Safe Harbor Agreements, and a new Prelisting Conservation Policy, among others. Why would private landowners and firms voluntarily engage in proactive conservation efforts? We address that question by exploring the incentives created by ESA programs, using a return on investment (ROI) framework to identify the costs and benefits of participation. The paper is relevant to firms affected by current or potential species listings. It is also relevant to NGO and government conservation advocates interested in encouraging more conservation by the private sector. The analysis sheds light on factors likely to affect participation, programs’ likely effectiveness, ways to better target partnering or cost-share engagements with the private sector, and the design of future programs to achieve conservation goals.