研究目的
Investigating the sources of cost variance in the California rooftop solar photovoltaic market and understanding the expansion of this market.
研究成果
The use of Chinese manufactured panels is associated with lower costs, and local economies of scale are also linked to reduced costs. Higher subsidies and contractor market-share are associated with higher costs. The study also highlights the role of non-cost factors, such as leasing models, in market expansion.
研究不足
The study is limited to the California rooftop solar photovoltaic market between 2007 and 2014. The analysis may not account for all unobserved variables affecting costs.
1：Experimental Design and Method Selection:
A semi-parametric regression model within the Generalized Additive Model frameworks is used to decompose cost variation into time-varying and cross-sectional components.
2：Sample Selection and Data Sources:
Publicly available data on approximately 100,000 solar photovoltaic systems installed in California between 2007 and
3：List of Experimental Equipment and Materials:
20 Not explicitly mentioned.
4：Experimental Procedures and Operational Workflow:
The model includes variables for the size of the system, installation date, subsidy amount, location, contractor, and manufacturer of the component panels and inverters.
5：Data Analysis Methods:
The analysis uses a cubic regression spline to account for the general non-parametric shape of the production profile, while allowing the observable variables to enter the equation linearly.
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