https://www.rand.org/pubs/research_reports/RRA2475-1.htmlOur statistical models predicted two outcomes of interest: the total number of UAPs over time and the total number of UAPs in clusters that accounted for a significantly higher number of reports relative to the rest of the country. Both of these models found inconsistent
results in the relationship between the nearest military installations and self-reports of UAP sightings. For example, there was a higher likelihood of UAP reports in areas that were within 60.1 km to 120 km of a Marine Corps installation, as compared with 30.1 km to 60 km, but there was some evidence that reports were less likely in areas within 30 km of these same installations.
Note: A link to the actual 60+ page study (PDF format) is embedded in the URL cited above.