ii) amount of silicon used per solar cell and the average efficiency
associated to it [17]: 3.9 g/Wp and 18% eff. to 6.5 g/Wp
and 15.5% eff.;
iii) total average labor costs per worker for the different countries
analyzed USD 220e3265/month;
iv) electricity price range, defined by the minimum and
maximum prices for the industrial sector in the OECD countries
in 2011 USD 0.0695 (USA)e0.2793/kWh (Italy);