A G-NIS approach emphasizes incentives and industrial policies geared towards creating market demand throughout the innovation cycle (such as feed-in tariffs, low-interest loans and public procurement), which are not generally necessary for an NIS (Stamm and others, 2009). Because of the enhanced uncertainty associated with green technologies, policymakers might need to emphasize greater risk-sharing between the private and public sectors so as to stimulate private sector investment. In addition, the G-NIS takes account of environmental and other externalities, and incorporates technological, industrial and environmental policies within one framework.