There has been a drastic fall in the cost of solar photovoltaic (PV) modules in the past four decades, with the reduction in prices nearing 99 percent. Recently, in a paper titled “Evaluating the Causes of Cost Reduction in Photovoltaic Modules” published the journal Energy Policy, Massachusetts Institute of Technology’s (MIT) associate professor Jessika Trancik, postdoctoral Goksin Kavlak, and research scientist James McNerney tried to ascertain the reasons behind the humongous fall recorded over a span of forty years.