Trends and patterns in research and development expenditures in the United States
This paper is a review of recent trends in United States expenditures on research and development (R&D). Real expenditures by both the government and the private sector increased rapidly between the mid-1970s and the mid-1980s, and have since leveled off. This is true of both overall expenditures an...
שמור ב:
| הוצא לאור ב: | Proc Natl Acad Sci U S A |
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| מחבר ראשי: | |
| פורמט: | Artigo |
| שפה: | Inglês |
| יצא לאור: |
National Academy of Sciences
1996
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| נושאים: | |
| גישה מקוונת: | https://ncbi.nlm.nih.govhttps://pmc.ncbi.nlm.nih.gov/articles/PMC34119/ https://ncbi.nlm.nih.govhttps://pubmed.ncbi.nlm.nih.gov/8917476/ https://ncbi.nlm.nih.govhttps://doi.org/10.1073/pnas.93.23.12658 |
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