Reference
Sources
Every empirical claim in this book is cited to a real source, rewritten as a formal conditional, or cut. These are the sources, in Chicago note form, generated from the register each chapter carries rather than maintained as a separate list. Entries not marked as cited are held in the register for a chapter still in preparation.
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Anthropic (@AnthropicAI), post on X announcing new weekly rate limits for Claude Pro and Max, July 28, 2025, accessed July 28, 2026, https://x.com/AnthropicAI/status/1949898502688903593.
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Erik Brynjolfsson, Danielle Li, and Lindsey Raymond, “Generative AI at Work,” Quarterly Journal of Economics 140, no. 2 (2025): 889-942, https://doi.org/10.1093/qje/qjae044.
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GitHub, “GitHub Copilot Is Moving to Usage-Based Billing,” The GitHub Blog, April 27, 2026, accessed July 29, 2026, https://github.blog/news-insights/company-news/github-copilot-is-moving-to-usage-based-billing/.
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Kyle Wiggers, “OpenAI Is Losing Money on Its Pricey ChatGPT Pro Plan, CEO Sam Altman Says,” TechCrunch, January 5, 2025, accessed July 29, 2026, https://techcrunch.com/2025/01/05/openai-is-losing-money-on-its-pricey-chatgpt-pro-plan-ceo-sam-altman-says.
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Maxwell Zeff, “Anthropic Unveils New Rate Limits to Curb Claude Code Power Users,” TechCrunch, July 28, 2025, accessed July 29, 2026, https://techcrunch.com/2025/07/28/anthropic-unveils-new-rate-limits-to-curb-claude-code-power-users/.
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Maxwell Zeff, “Cursor Apologizes for Unclear Pricing Changes That Upset Users,” TechCrunch, July 7, 2025, accessed July 29, 2026, https://techcrunch.com/2025/07/07/cursor-apologizes-for-unclear-pricing-changes-that-upset-users/.
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Michael Truell, “Clarifying Our Pricing,” Cursor, July 4, 2025, accessed July 29, 2026, https://cursor.com/blog/june-2025-pricing.
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Microsoft Corporation, “FY26 Second Quarter Earnings Call,” January 28, 2026, accessed July 29, 2026, https://www.microsoft.com/en-us/investor/events/fy-2026/earnings-fy-2026-q2.
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Russell Brandom, “Anthropic Tightens Usage Limits for Claude Code Without Telling Users,” TechCrunch, July 17, 2025, accessed July 29, 2026, https://techcrunch.com/2025/07/17/anthropic-tightens-usage-limits-for-claude-code-without-telling-users/.
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Sam Altman (@sama), post on X on ChatGPT Pro subscription economics, January 5, 2025, accessed July 28, 2026, https://x.com/sama/status/1876104315296968813.