@techreport{OriginsOpioids_19,
  title = "Origins of the Opioid Crisis and Its Enduring Impacts",
  author = "Alpert, Abby E and Evans, William N and Lieber, Ethan M.J. and Powell, David",
  institution = "National Bureau of Economic Research",
  type = "Working Paper",
  series = "Working Paper Series",
  number = "26500",
  year = "2019",
  month = "November",
  doi = {10.3386/w26500},
  URL = "http://www.nber.org/papers/w26500"
}