Researchers have found that fake and automated accounts (bots) on X have posted misinformation related to U.S. elections, the coronavirus pandemic, and far-right conspiracy theories, and bots have been used by groups to try to foment discord in past elections domestically and internationally.
November 24, 2025
high
observational
Academic and investigative findings about the behavior and use of bots on the platform.
Researchers estimated that if premium subsidies for Affordable Care Act (ACA) marketplace plans expire, the average cost of insurance purchased through the health insurance marketplace would roughly double and millions of people could become uninsured.
November 06, 2025
medium
temporal
Projected effects of allowing ACA premium subsidies for marketplace plans to expire.
Some researchers have asserted links between aluminum in vaccines and conditions such as autism and attention deficit hyperactivity disorder, while public health experts state there is no good evidence that aluminum in vaccines is unsafe.
October 31, 2025
high
general
There is a scientific dispute: some critics allege harms from aluminum in vaccines, whereas mainstream public health assessment finds no robust evidence of safety concerns.
There is no public, official, unified, and comprehensive database of domestic terrorism incidents in the United States, so researchers assemble their own datasets when analyzing trends in domestic political violence.
October 25, 2025
high
descriptive
Describes the methodological environment researchers face when studying domestic terrorism in the U.S.
Scraping publicly available online data is a common practice used by businesses and researchers.
October 22, 2025
high
general
Describes a widespread data-collection method used across industry and academia.
The American Community Survey Public Use Microdata Sample (PUMS) provides publicly available microdata that enable measurement of economic, demographic, and housing trends across small geographic areas and small population subgroups and are used by state and local governments and researchers studying topics such as health equity and immigrant health.
October 11, 2025
high
temporal
Describes the content and common uses of the ACS PUMS dataset.
The Digital Services Act (DSA) came into force in February 2024 and guarantees researchers anywhere in the world access to public data from online platforms for studies of 'systemic risks' to the EU, including negative effects on elections and public health.
February 01, 2024
high
legal
Scope of researcher-access provisions under the DSA.
Some online platform operators restrict researcher access to public data citing tensions with privacy regulations and concerns that shared data could be used to train artificial intelligence models.
January 01, 2024
high
operational
Reported reasons platforms limit external researcher access to their datasets.
Vaccines undergo evaluation before being added to immunization schedules and are continually monitored by researchers and regulators after implementation.
high
process
Describes the standard regulatory and surveillance processes applied to vaccines.