The city that invented participatory budgeting let neighborhood assemblies rank capital spending priorities. Tens of thousands of residents — disproportionately poor residents — decided real allocations year after year.
Roads, water connections, and school access measurably improved in underserved districts; government responsiveness and civic organization strengthened; residents who participated became more politically active afterward. Then the hard lesson: when political commitment faded in the 2000s, the gains eroded.
Both halves. Participation moves real money toward real needs — and processes that depend on a champion die with the champion. That erosion is why this platform is built as durable public infrastructure: open source, config-driven, cheap enough to survive indifference, with a succession plan written before it's needed.
Porto Alegre allocated binding budget shares; a county platform produces signal. The mechanism differs; the participation effects are what transfer.
Sources: WRI: Porto Alegre and the challenge of sustaining change · Participatory budgeting in Brazil (SDG16+)