An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Richter JI, Patel PC.Richter JI, et al. Among authors: patel pc.Small Bus Econ (Dordr). 2022;58(2):769-805. doi: 10.1007/s11187-021-00529-x. Epub 2021 Jul 11.Small Bus Econ (Dordr). 2022.PMID: 38624606Free PMC article.
Rietveld CA, Patel PC.Rietveld CA, et al. Among authors: patel pc.Eur J Health Econ. 2019 Sep;20(7):949-967. doi: 10.1007/s10198-019-01055-0. Epub 2019 May 2.Eur J Health Econ. 2019.PMID: 31049764Free PMC article.