Using data on lobbyist contributions to members of the Congress from the Center for Responsive Politics, the analysis looks at the nine election cycles between 1998 and 2014, and determines the types of issue networks that lobbyists create through financial contributions to the Congress members. Applying an ERGM model and using Mahalanobis distances, the study finds the strength of connections, the distance between the issue clusters, and the key members of each cluster over time. Finally, the findings from this dynamic network pattern are used as an attempt to shed light on political polarization, government effectiveness, and the development of issue networks in future election cycles.
This study investigates the relationship between different types of direct and indirect renewable energy support policies and non-hydroelectric renewable energy capacities among 105 countries in 1990-2014 period. The results of the panel data regressions with fixed effects indicate that feed-in tariffs and sustainable development policies are associated with higher levels of renewable energy deployment.
This study is the first piece that employs the International Energy Security Risk Index—a comprehensive index composed of 29 measures related to energy security. The study employs five different composite indices for energy security. The results of the panel data analysis with fixed effects indicate that there is no statistically significant connection between energy security and renewable energy development.
A causal inference approach that looks at the relationship between renewable energy policies and renewable energy deployment in the United States. Controlling for the state-level renewable energy potentials, the analysis finds strong evidence that the renewable energy policies in the US are not effective.