The results of the IED and IEnv policy adoption EHA analyses are presented in Tables 1 and 2.
States have entered into IEnv policy out of necessity.
Policy adoption, economic development environmental policy theory suggest that these would be key determinants and, in fact, citizen demand variables feature prominently in the IED, and to a lesser extent the IEnv, policy adoption models.
In this model, however, per capita income is positively related to both IED and IEnv, although the relationship diminishes somewhat in the IED model as income rises.
Interestingly, increased levels of racial diversity are negatively related to IEnv policy adoption.
This explanation, however, does not fit as neatly for IEnv policy.
Interest groups generally did not demonstrate a significant relationship with IEnv policy adoption.
Additionally, in the realm of IEnv, policies are more focused on information sharing and coordination.
Common pool resource (CPR) issues like IEnv policy, however, require a different analysis.
Interestingly, institutional capacity variables were not significant in the IEnv model either.
Although I would expect Ringquist's analysis to apply to IEnv policy, there are some differences between international and domestic environmental policy adoption process that may return somewhat varying results.
I expected a positive relationship between border states and IEnv and I was not disappointed.