A really big starting point would be to look at the various ways in which they're emerging, and to look at our policy instrument mixes.
The methodology right now is to look at the range of policy instruments that are supporting different technologies, and how they're emerging. Part of this is to look at the relative policy instruments for these different technologies that are emerging. It's an established methodology. I'm writing several papers on that right now. That would be one way.
Another way is to study the emergence of these clusters to see how they're being governed and how they're happening. Again, in the European Union, Horizon 2020 is funding a range of projects that are helping the set-up and start-up of these types of clusters and studying the ones that already exist.
These clusters are everywhere. They're in South America, India and all over the world. They're emerging, and this is the way we will transition to a renewable energy future.