https://www.chartercitiesinstitute.org/post/case-for-charter-cities-effective-altruism (archived announcement, archived report)
Excerpt:
A substantial theoretical and empirical economic literature argues that institutions are the primary determinant of long-run economic outcomes. The paper offers a brief introduction to the institutions literature and presents two case studies focusing on sets of major institutional reforms that pulled billions out of extreme poverty: India and China. We discuss the potential areas for reform in a charter city and the widespread success of special economic zones and other projects like charter cities.
Finally, we make an initial effort at quantifying the cost-effectiveness of charter cities. Although the model is relatively simplistic, it allows for direct comparison between GiveWell’s top charities and the Charter Cities Institute. Our modeling suggests that a single charter city could be as effective as Deworm the World, GiveWell’s top charity, within 50 years. Under a set of optimistic but not unreasonable assumptions, a charter city could be over 40 times as effective as Deworm the World.
I think this framing is misleading. A "growth change" just is repeated (increasing) level changes. The figure on p.14 says that constant 6.5% growth over 50 years will increase GDP per capita to $90k. This is an accounting identity—there's no new information in "6.5% growth over 50 years" that's not in "GDP per capita increased from $4k to $90k over 50 years".
I'd prefer to have the discussion purely in levels, with much more detail on what specifically is increasing GDP. For example: "GDP will increase by $X million over the first five years, driven by increases of $A, $B, $C in sectors 1, 2, 3; there will be N1 new firms and N2 new residents..." If you can assume a growth rate, you can fill in these details. Also, I think the assumption of a constant growth rate over fifty years is too strong.
I'd like to see a lot more discussion of what CCI's contribution is. This sounds like a political slogan.