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Swanson's Law is an observation that the price of solar photovoltaic modules tends to drop 20 percent for every doubling of cumulative shipped volume. At present rates, costs halve about every 10 years. 〔()〕 The Law is named after Richard Swanson, the founder of SunPower Corporation a solar panel manufacturer. Swanson's Law has been compared to Moore's Law. Crystalline silicon photovoltaic cell prices have fallen from $76.67 per watt in 1977 to $0.36 per watt in 2014. The term ''Swanson's Law'' appears to have originated with an article in The Economist published in late 2012.〔〔 It is a misnomer in that Swanson was not the first person to make this observation. The method used by Swanson is more commonly referred to as ''learning curve'' or ''experience curve'' analysis. It was first developed and applied to the aeronautics industry in the mid-1930s, and saw its first widespread application to the photovoltaics industry in the mid-1990s. ==See also== * Log-log plot * Growth of photovoltaics * Photovoltaic system 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Swanson's law」の詳細全文を読む スポンサード リンク
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