Subsidizing small high-technology firms is now considered to be important in stimulating economies throughout the world. This is because fast growing small firms create new markets and jobs. The Small Business Innovation Research (SBIR) program has played an important role in the United States...

Technological innovation has extensively been studied to make firms sustainable and more competitive. Within this context, the most important recent issue has been the dynamics of collaborative innovation among firms. We therefore investigated a patent network, especially focusing on its spatial...