Policy innovation and change: the diffusion and modification of the renewable portfolio standard, 1994 – 2014
To date, the U.S. federal government has not enacted a national renewable energy policy. Inertia at this level of government creates a policy space that allows American states to take the lead. State policy drives clean energy development. By the fall of 2014, every state in the nation had adopted at least one policy supportive of increased market penetration of renewable energy, and 38 states had adopted either a mandatory renewable portfolio standard (RPS) or a voluntary renewable energy goal. Between January 1, 1995 and the end of 2014, over 207 legislative changes amended existing RPSs and ...
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