Here is an interesting new study on using Moore's Law to predict technological evolution. The Moore's effect is surprisingly good at predicting and especially it does apply well on predicting the price evolution of solar electricity.
How to predict the progress of technology MIT researcher finds Moore’s Law and Wright’s Law best predict how technology improves. http://web.mit.edu/newsoffice/2013/how-to-predict-the-progress-of-technology-0306.html Here are two very good and up to date graphs on price evolution of solar in Germany during the recent years: PV-Preisindex (2009-2013) http://solarlove.org/wp-content/uploads/2013/02/PV-Preisindex-Photovoltaikumfrage.de-photovoltaik-guide.de-Januar-2013.jpg German Industrial Roof-to Grid Parity at 100% on-site self-consumption at the time of generation http://puheenvuoro.uusisuomi.fi/sites/default/files/imagecache/biggest/domain-6080/kuvat/grid.parity.png —Jouni