A more detailed study would have to consider national and subnational differences in production possibilities for the various technologies. Note that, as argued above, the fact that the GFIT examined here has different tariffs for the various technologies is an incentive for countries to focus on the energy sources that have the highest technical potential, irrespective of their cost relative to other technologies. Therefore, using technical potentials to divide the investment in renewables among the various technologies makes sense relative other alternatives such as considering the actual choices made by countries currently, in the absence of external support for renewable energy sources.