Cognitive Scaffold

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MENTAL MODEL · M9329

Equalized Grain Purchase

Equalized Grain Purchase
BusinessHigh supportEconomics
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Updated 2026-08-22

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INTRODUCTION

English translation pending.

CORE DEFINITION

The equalized grain purchase policy was proposed by Li Kui, the Warring States reformer who served the state of Wei. In years of abundance the state bought grain at a floor price to prevent cheap harvests from ruining farmers, and in lean years it sold from reserves at a moderate price to prevent scarcity from ruining consumers. The core proposition is that a public buffer stock can dampen price cycles that private traders amplify, and the policy became the ancestor of the ever-normal granary system. The key qualification is that the scheme depends on fiscal capacity and honest administration, since capture turns smoothing into extraction.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Build The Buffer: accumulate reserves during fat periods so you can act when conditions turn hostile. - Buy Low Sell Steady: set explicit trigger prices for adding and releasing reserves rather than reacting emotionally. - Counter The Cycle: expand hiring or investment precisely when peers are retreating.

anchor

Anchor fast decisions

Private traders profit from volatility, so they buy when prices are already low and sell when they are already high, amplifying swings. A public buffer does the opposite: its purchases absorb excess supply and put a floor under prices, and its sales release supply that caps spikes. Because expectations shift once a credible floor and ceiling exist, speculative hoarding loses its payoff and the amplitude of the cycle shrinks.

MINIMUM ACTION

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Source support: Explicit

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    zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E6%B1%89%E4%B9%A6ZH · Explicit
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