Leverage Points in Systems

What has been corrected on this page?

Every accepted correction to this page is recorded with the exact change, so readers can see how the page improved over time.

1. 28 July 2026 · corrected by Emir Baycan

   Corrected five overstated or mis-cited claims: qualified the California time-of-use pricing peak reduction (studies typically find single-digit to low-double-digit reductions, not 15-30%); reframed the Soviet planned-economy example so misspecified targets are one factor among many (missing price signals, weak incentives, political constraints) rather than the sole root cause; corrected the Montreal Protocol account, which succeeded through binding rules (an adjustable phase-out schedule) plus available substitutes and a changed mindset, not a paradigm shift instead of rules; generalized an unverifiable Grubb et al.

   '18 countries, 1990-2015, Nature Climate Change 2021' comparison to the debated general finding that carbon pricing alone often underdelivers while standards and technology support can drive larger reductions; and qualified the Hanushek finding to emphasize teacher quality and cognitive skills over spending while noting that formal accountability's added leverage is debated.

   What the page claimed

   The article said TOU pricing cut peak demand 15-30%, that Soviet metric goals were the sole root cause, that the Montreal Protocol succeeded through paradigm shift not rules, cited a Grubb 2021 18-country ranking, and said Hanushek proves accountability is higher leverage than spending.

   What was corrected

   Qualified the TOU, Soviet, and Hanushek claims, corrected the Montreal Protocol mechanism, and generalized the unverifiable Grubb specifics.

   Why: Several figures and the Grubb citation were overstated or unverifiable, and the Montreal Protocol characterization was backwards. Corrections scope the claims and correct the mechanism rather than adding new sources.

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