Anyone has data for US federal R&D expenditure before WWII? I found an old report from 1939, and from that I get 0.13% of GDP in R&D (vs 0.71% for 1953). The number makes sense to me, just to check.
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My original source,fwiw is https://archive.org/details/researchanationa1940unitrich … . It's a bit dry, but has loads of info about R&D expenditure composition (largest chunk was in agriculture!)
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Adjacently, you may like Vannevar Bush's original memo that led to centralization of R&D spend by govt https://www.nsf.gov/od/lpa/nsf50/vbush1945.htm …
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Hindsight shows they were right to be cautious!
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