This is the fifth and final post in a series on the details required to get carbon policy right. See also parts one, two, three, and four.
So far, I've done a lot of complaining -- which, in and of itself, is just, well ... whiny. Here, then, is a solution.
First, a very brief review:
- A test of good carbon policy is whether it encourages the private sector to invest capital in projects that will reduce GHG emissions.
- "Additionality" confuses carbon policy, by preferentially shifting investment toward less economic GHG-reduction technologies.
- Carbon taxes provide sticks without carrots, and thereby provide no direct incentive to those who might otherwise use carbon pricing to invest in projects that lower GHG emissions.
- Long-term carbon pricing is necessary to encourage private sector investment. Spots alone will not.
- Although not covered in this series, it bears repeating that auctions trump allocation.
Unfortunately, virtually all of the GHG-reduction strategies currently in existence (e.g., Kyoto, RGGI) or being contemplated (e.g., Lieberman-Warner, California AB 32) fail one or more of the prior tests. Moreover, all those actual/proposed bills are really complicated, with many moving parts that are rife for gaming -- or, more charitably, significant legislative error. Here, then, is a better approach: output-based GHG regulation.