Unverified50% confidenceFactExact time
三级价格歧视理论由阿瑟·庇古在1920年系统化，理论基础可追溯至19世纪法国经济学家朱勒·迪普伊的边际效用研究
1
Sources
50%
Confidence
Long-term
Relevance
7/14/2026
First Seen
Sources
月付200美元用不上旗舰模型？Claude订阅困局与Token计费方案探讨
redditr/ClaudeAI7/12/2026
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