The U.S. Chamber commissioned a study of the economic impact of project that have been delayed or canceled as a result of federal and state permitting processes. As described by the U.S. Chamber on its website:

This study estimates the potential loss in economic value of 351 proposed solar, wind, wave, bio-fuel, coal, gas, nuclear and energy transmission projects that have been delayed or canceled due to significant impediments, such as regulatory barriers, including inefficient review processes and the attendant lawsuits and threats of legal action.

The Chamber does acknowledge you can’t blame the fact these project did not move forward exclusively on permitting:

As noted above, we do not believe that all of the subject projects will be approved or constructed even in the absence of any legal and regulatory barriers. Also, as with all economic forecasts, we recognize that there is an element of uncertainty. This could be true here because, to our knowledge, this is the first empirical study to quantify the macroeconomic and employment impact of the regulatory barriers imposed on the development and operation of so many energy projects.

The Study is a first real attempt to aggregate data on the impacts regulations on development. Below is a snaptshot of projects at issue in Ohio.