Many jurisdictions have implemented bans or taxes on plastic grocery bags based on environmental concerns. In 2007, San Francisco enacted a county-wide ban that included large grocery stores and drugstores. Los Angeles, Palo Alto, and other cities in California have followed suit.
In research carried out at PERC this summer, Jonathan Klick, a PERC Lone Mountain Fellow, argues that reusable grocery bags contain potentially harmful bacteria, especially coliform bacteria such as E. coli. Klick finds that, in the wake of San Francisco's ban, deaths and ER visits related to these bacteria spiked as soon as the ban went into effect. For more on this ongoing research, watch our interview with Klick above.


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.