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?