Each bar is one assumption's worth, from the Berkeley assumptions to the Hoover assumptions. The calculator applies each team's assumptions to the same roster, so its figures differ a little from the published ones. Try it: policyengine.org/us/californ…

Estimates for Prop 40, the 2026 Billionaire Tax Act, run from ~$100B in revenue (Galle, Gamage, Saez & Shanske) to a −$39B mean net present value (Jaros & Rauh). Our open calculator splits the gap by assumption. Webinar Fri Oct 30, noon PT: us06web.zoom.us/meeting/regi…