In the Orlando Sentinel: Space cluster growing as big firms prep for arrival.  Exceprt here:

When Blue Origin opens its doors and starts rocket production, it could mean more chances for contractors to provide them with necessary parts.

That type of expansion can build on itself, as clusters attract more companies within the same industry, said Christian Ketels, a researcher at Harvard Business School who has studied industry clusters in regions.

This Working Paper examines how cluster growth could increase the prosperity of Ontario, and using five examples of strong clusters in Ontario, proposes recommendations on how to improve the ecosystem that fosters successful clusters. Download the full report at the website of the Institute for Competitiveness and Prosperity: http://www.competeprosper.ca/work/working_papers/working_paper_26