Mengjia Ren, Lee Branstetter, Brian Kovak, Daniel Armanios, Jiahai Yuan, 16 March 2019

Despite leading the world in clean energy investment in recent years, China continues to engage in massive expansion of coal power thanks to policies that effectively subsidise and (over)incentivise coal power investment. This column examines the effects of the 2014 devolution of authority from the central government to local governments on approvals for coal power projects. It finds that the approval rate for coal power projects is about three times higher when the approval authority is decentralised, and provinces with larger coal industries tend to approve more coal power.

Judson Boomhower, Lucas Davis, 01 February 2017

Electricity prices can vary dramatically within a single day. However, most analyses of energy efficiency programmes ignore this variation, focusing on total energy savings without regard to when those savings occur. This column uses hourly smart-meter data to demonstrates a surprisingly large variation in economic value across energy efficiency investments. Air conditioner investments, for example, deliver savings when the value of electricity is high, increasing their value by about 50%.

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