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Written testimony submitted December 14, 2023 by Stanford University Professor Keith Humphreys to the U.S. Senate Special Committee on Aging PDF

Testimony of Keith Humphreys to the House of Commons Standing Committee on Health hearing on the opioid epidemic in Canada, December 11, 2023, Ottawa. PDF

Written Testimony of Professor Keith Humphreys, Stanford University, to the December 4 hearing of the Joint Legislative Committee on Addiction and Community Safety, Oregon PDF

Testimony of Professor Keith Humphreys, Stanford University to Joint Committee on Mental Health, Substance Use, and Recovery, Massachusetts Legislature. PDF

Testimony of Professor Keith Humphreys, Stanford University to July 5, 2023 hearing of The California Senate Committee on Health PDF

Testimony of Professor Keith Humphreys to the Joint Committee on Mental Health, Substance Use and Recovery, Massachusetts State Legislature PDF

Testimony by Professor Keith Humphreys on Fentanyl, Opioid Addiction and Overdose, joint hearing of The California Assembly Select Committee PDF

Canada's Health Crisis -- Profiling Opioid Addiction in Alberta & British Columbia PDF

Comments on Proposed Regulation of Medications for Opioid Use Disorder by Richard Frank, Keith Humphreys, and Haiden Huskamp. link


Testimony of Keith Humphreys to Oregon State Senate Judiciary Committee at Hearing on Proposition 110 implementation. pdf



Blair Gibbs' report on cannabis legalization in Canada. pdf

Tom Coderre and Keith Humphreys testify at hearing of the Senate Caucus on International Narcotics Control. link

New training on adolescent e-cigarette education and prevention found helpful by educators in new research by Bonnie Halpern-Felsher. link


A detailed overview of adolescent e-cigarette prevention and cessation programs by Bonnie Halpern-Felsher, Current Addiction Reportslink

Letter to Governor Newsom from Stanford addiction experts supporting expanded treatment for people on parole pdf


The Political Economy of the Opioid Epidemic by Mariano-Florentino Cuellar and Keith Humphreys. Yale Law & Policy Review pdf

Opioids, Cannabis, and Vaping: Using Science to Protect Public Health: Joint Hearing of the Senate and General Assembly Health and Human Services Committees, State of Rhode Island (2019) (Testimony of Four SNAP members) pdf

Humphreys, K., Saitz, R. (2019) Should Physicians Recommend Replacing Opioids with Cannabis. JAMA doi:10.1001/jama.2019.0077. link

Letter from Keith Humphreys, Baron Hogan-Howe, and Baroness Finlay to UK Parliamentary Select Committee regarding managing drug-involved criminal offenders pdf


Humphreys, K. (2018) Health Care System Policies That Can Promote Safer Opioid Prescribing. A Report to the Laura and John Arnold Foundation. pdf

Immigration and the Opioid Crisis: Hearing before the House Judiciary (Subcommittee on Immigration and Border Security), House of Representatives, 115th Cong. (2018) (Testimony of Keith Humphreys, Ph.D.) Link to Dr. Humphreys' Hearing Testimony