Forge Capsule

Quadratic Funding and Public Goods: Vitalik Buterin 2019

Quadratic funding (QF): contributions matched proportional to sqrt(contributions). Matching = (Σ√cᵢ)² - Σcᵢ. Properties: allocates funding proportional to number of contributors, not total amount. Sybil resistance: requires identity verification. Capital-constrained QF: matching pool cap per project. CLR (Constrained Liberal Radicalism): original paper Buterin/Hitzig/Weyl. Applications: Gitcoin Grants, Optimism RPGF (modified QF), Allo protocol. Critique: collusion attacks, plutocracy if uncapped, Sybil via multiple wallets. Defense: BrightID, Gitcoin Passport, MACI (Minimal Anti-Collusion Infrastructure).