David Keiser and Gabriel E. Lade are assistant professors of economics at Iowa State University.
Ivan Rudik is an assistant professor of applied economics at Cornell University.

Rural America
Ozone Levels in National Parks are Now Similar to Cities, Why Does it Matter?
David Keiser, Gabriel E. Lade and Ivan Rudik
Announcing In These Times’ New Agreement with the National Writers Union
Freelance contributors are essential to the quality and success of In These Times and independent media, and this agreement is one way to demonstrate their value to our publication and our commitment to transparency.
For more information about the National Writers Union, visit nwu.org.
Read the full agreement, which reaffirms a floor for the rates of our freelance editorial content, as well as our current rates (which are higher) and submissions guidelines below.