Policy

Nullification: What factors prompt states to override federal laws?

Disaster resilience: How can cities improve planning and infrastructure?

Swift water rescues: Study examines why some people ignore indicators

Unemployment rates may affect insurance enrollment, study finds

Professor joins national study on growing dangers of urban flooding

How quickly will the U.S. fully adopt self-driving, web-connected vehicles?

Analysis reveals links between women’s security, national security

Increasing permits to conceal guns has zero effect on crime, data say