Against the Burden of Knowledge

The post questions whether the burden of knowledge can explain the gap between rising R&D investment and slower productivity growth. It treats the idea as plausible, but argues that new tools, new fields, and institutional decay in academia may fit the evidence better.

Reading notes

#

• The burden of knowledge says new ideas become harder to find because researchers must learn more old knowledge before pushing the frontier forward.
• The claim seems intuitive because scientific progress builds on accumulated knowledge and training often takes years before original work begins.
• The post says the empirical pattern behind the claim includes older journal authors, older Nobel-level work, larger research teams, and narrower specialization.
• It argues that accumulated knowledge can also be a resource that gets used through specialization and trade, rather than only a burden.
• A scientist or entrepreneur can rely on complex tools made by others instead of learning or rebuilding all of the underlying knowledge.
• The post uses orbital mechanics to show that new discoveries can replace old frameworks rather than require mastering all earlier ones.
• It also points to transitions such as Newtonian to relativistic mechanics, Greek geometric algebra to Arabic equations, and alchemy to chemistry as cases where past knowledge was not a necessary obstacle.
• The same empirical trends can be explained by institutional decay in academia, including inward-looking grant and review networks, risk-averse funding, and an exclusive business model.
• The post presents metascience as a possible response if institutional design is part of the problem.