Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00578-w
We focus on unemployment as our priority outcome because it most directly captures the potential for economic harm—a worker who is unemployed wants a job and has not yet found one. In this case, job postings and employment do not necessarily signal the need for policy responses; a decline in job postings for a highly exposed role may be counteracted by increased openings in a related one. Most harmful labor market developments of AI should arguably include a period of increased unemployment, as displaced workers search for alternatives. The Current Population Survey is well suited to tracking this, as unemployed respondents report their previous job and industry.
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An example of dynamic shadows from VoxRay’s twitter.
做饭的师傅是一位老头，水管冻坏了，他又挑不动水，就用坑口里的冰块化开了，给大伙做饭吃。雪白的馒头，初尝很香，咽下，有一股苦味，再到后来，有一丝微微的腥甜，大家都懂得，那是炸药和金子的味道。
While I was writing this blog post, Vercel's Malte Ubl published their own blog post describing some research work Vercel has been doing around improving the performance of Node.js' Web streams implementation. In that post they discuss the same fundamental performance optimization problem that every implementation of Web streams face: