Abstract: Large language models have fundamentally altered the economics of written job applications by reducing production costs to near-zero. This article examines the market-level consequences through evidence from Freelancer.com, a major digital labor platform. Analysis reveals how AI-generated applications degraded a critical quality signal that previously enabled efficient worker-employer matching. Pre-LLM, employers valued customized applications equivalent to a $26 bid reduction; this premium fell 64% post-LLM as customization lost predictive power for worker ability. Structural estimates reveal the equilibrium impact: eliminating credible written signals caused high-ability workers (top quintile) to experience 19% lower hiring rates while low-ability workers (bottom quintile) saw 14% higher rates. Total market surplus declined 1% while worker surplus fell 4%, with efficiency losses concentrated among high-ability workers unable to credibly differentiate themselves. These findings illuminate economic risks facing organizations that rely on written applications for screening and suggest strategic responses centered on performance-based evaluation, verifiable credentials, and contract design.

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