Frank Ackerman is an environmental economist who has written widely on energy, climate change, and related issues. He is well known for his critiques of overly narrow cost-benefit analyses of environmental protection, among other topics. He has directed studies and reports for clients ranging from Greenpeace to the European Parliament, including many state agencies, international organizations, and leading environmental groups. His books include Climate Change and Global Equity (2014, co-written with Dr. Elizabeth A. Stanton), Climate Economics: The State of the Art (2013, co-written with Dr. Stanton), Can We Afford the Future? (2009, on the economics of climate change), and Priceless: On Knowing the Price of Everything and the Value of Nothing (2004, on the limitations of cost-benefit analysis).