Economic Welfare and the Allocation of Resources for Invention
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Summary
Arrow explains why competitive markets may underinvest in invention. Producing knowledge is uncertain, using it has increasing returns, and an idea can be difficult to sell without revealing it; limited appropriability therefore separates the private reward from the social value of research.
Why it matters
AI may lower the cost of creating and spreading knowledge, but it does not remove the underlying incentive problem. Openness, intellectual property, public funding, research institutions, and access to models can still shape how much knowledge is produced and who captures its rents.
What to keep in mind
The chapter analyzes the mid-century invention system rather than AI. Modern model training, compute, patents, copyright, and open-source production have different institutions, and cheaper idea generation does not automatically solve verification, adoption, or incentive problems.