Rohan Paul@rohanpaul_ai · 6天前60MIT study. Code volume surges by 300%, but output increases by only 30%: The AI dividend meets an awkward reality.
They studied 100,000+ GitHub developers and find that AI coding agents massively increase code production, but much less of that work becomes shipped software.
Autonomous AI coding agents raised commits by 180%, but releases rose only 30%.
The paper’s main idea is that software production has weak links, so faster code writing does not help as much when humans still need to review, connect, test, package, and ship the work.
The authors also check app marketplaces and find more new apps, but no increase in total usage, which means more software appeared without clear evidence that users adopted more software.
The marketplace evidence points the same way: more new apps appeared, but total usage did not rise.
The authors compare more than 100,000 GitHub developers before and after they start using 3 generations of AI coding tools, from autocomplete to more independent coding agents.
Autocomplete raised commits by 40%, interactive coding agents raised them by 140%, and autonomous coding agents raised them by 180%.
The 180% commit gain shrank to 50% for the number of projects and 30% for actual releases.
The estimated "elasticity of substitution" is 0.25 i.e. for every big improvement in AI’s usefulness, only a small amount of human work can be replaced.
Because AI can write code faster, but humans are still needed to decide what to build, check if the code works, connect it with the rest of the product, fix messy edge cases, and actually ship it.
---
papers .ssrn.com/sol3/papers.cfm?abstract_id=6859839
译MIT 论文分析 10 万+ GitHub 开发者使用三代 AI 编码工具的效果:自动补全使提交量增 40%,交互式智能体增 140%,自主智能体增 180%,但项目数仅增 50%,实际发布仅增 30%。应用市场同样出现新应用激增但总使用量未升。核心原因:软件开发存在弱环节——人类仍需决定功能、审查代码、测试、集成与发布。替代弹性估算仅 0.25,即 AI 能力大幅提升时,只有少量人类工作可被替代。