From the press release:
Today, the National Park Foundation (NPF) announced the first-ever study providing a comprehensive economic valuation of America’s national parks and the programming provided by the National Park Service (NPS). The study, conducted by Professor John Loomis and Research Associate Michelle Haefele, both at Colorado State University, and Professor Linda Bilmes of the Harvard Kennedy School, determined the total economic value (TEV) of national parks and the National Park Service’s programs to be $92 billion.
The study, a reporting of total economic value, clearly demonstrates the public’s shared perception of the incredible benefits of national parks and programs, whether they personally visit parks or not. In fact, 95% of the American public said that protecting national parks for future generations was important and 80% would pay higher federal taxes to ensure the protection and preservation of the National Park System…..
Americans think national parks are worth US$92 billion, but we don’t fund them accordingly
Source: John Loomis, Linda Bilmes, The Conversation, July 10, 2016