Kahn and Kotchen on unemployment and environmental concern

Matthew Kahn (a teacher of mine during my MA at Tufts) and Matthew Kotchen have an interesting sounding paper showing that people appear to be less concerned about the environment when the economy is doing worse. Fewer people search Google for “global warming” and fewer survey respondents say they think global warming is occurring when their state’s unemployment rate is higher. (This is with state and month-year fixed effects, meaning that the difference is not just capturing over-time changes in attitudes or stable geographical differences between people in richer and poorer states.)

Some of the results, like the one about Google search terms or another finding about people’s responses to a “most important problem question,” are consistent with the idea that economic concerns crowd out environmental concerns. But the fact that survey respondents say global warming is not happening when their local economy is doing poorly says something different: it suggests that economic problems do not simply change people’s priorities, they also change their views. (Or that, when someone’s priorities are changed, his or her views adjust to become consistent with those priorities: if I don’t spend much time worrying about the environment, the problem must not be happening.) (Sorry: or that it takes time to learn that global warming is happening, and people don’t have that time when they are worried about the environment.)