how does decentralized planning work?


I’ve read various google pages with no success as to figuring out how decentralized planning is supposed to work and how it differs from centralized planning and markets. It seems to basically be centralized planning but on a state or local level, but i’m not sure how that’s supposed to organize into a single nation-wide economy without a central planning board. I’ve also heard mentions of consumer cooperatives and actual implementation in Kerala, India, but have not been able to find elaborations on this.

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