ScD, SM, MA · Professor, Community Health Sciences & Epidemiology
Social epidemiologist studying how policy shapes health — from alcohol and firearm laws to opioid overdose prevention — with a focus on vulnerable populations including youth, elderly, and those with substance use disorders.
Areas of Expertise
Applying social epidemiology and advanced quantitative methods to understand how social policies and interventions address poverty, substance use, and injury among vulnerable populations, and improve public health outcomes.
Examining how alcohol taxes, outlet density regulations, hours-of-sale laws, and advertising restrictions affect drinking behavior, binge drinking, impaired driving, and alcohol-attributable mortality across the United States.
Studying the public health impact of state gun laws — including universal background checks, domestic violence firearm prohibitions, and permitless carry — on gun homicide, suicide, and injury rates, including racial and geographic disparities.
Evaluating post-overdose outreach programs, naloxone distribution policies, and stimulant-inclusive intervention strategies to reduce overdose fatalities and improve treatment engagement among overdose survivors.
Investigating age onset, patterns and trajectories of risky behaviors during developmental sensitive period and other transitions from a life-course perspective.
Federally Funded Research
Principal investigator on multiple R01 and cooperative agreement awards examining policy determinants of substance use and injury in the United States.
We aimed at developing an improved measure of alcohol taxation, and investigate its impact on state alcohol treatment facilities capacity and AUD health service outcomes.
We built a longitudinal state anti-bullying panel data and evaluated the anti-bullying policy environment on youth risky behaviors including bullying victimization, suicidality, and gun-carrying.
View State Map →Our research team characterized the U.S. state policy environment, conceptualized as the effect of multiple concurrent policies and operationalized as Alcohol Policy Scale (APS) measures. We employed longitudinal policy panel data to examine its impact on alcohol related mortality outcomes.
Academic Training
Scholarship
Over 180 peer-reviewed articles, with research featured in Reuters, CNN, US News & World Report, and the Boston Globe.
Consulting & Collaboration
Dr. Xuan consults with health agencies, nonprofits, policymakers, and legal teams on public health evidence, research methodology, and policy analysis.
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