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US FDA Drug Approvals are Persistent and Polycyclic: Insights into Economic Cycles, Innovation Dynamics, and National Policy
It is challenging to elucidate the effects of changes in external influences (such as economic or policy) on the rate of US drug approvals. Here, a novel approach—termed the Chronological Hurst Exponent (CHE)—is proposed, which hypothesizes that changes in the long-range memory latent within the dyn...
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
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Springer International Publishing
2021
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8009272/ https://www.ncbi.nlm.nih.gov/pubmed/33786755 http://dx.doi.org/10.1007/s43441-021-00279-8 |