Washington State Institute for Public Policy
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December 2016
The 2015 Washington State Legislature directed WSIPP to review existing literature and begin a four-year study to evaluate outcomes regarding the cost-effectiveness of FDA-approved long-acting injectable medications, focusing on the benefits to persons in prison when they are released into the community.

We review the research evidence on the effectiveness of these medications in reducing substance abuse and recidivism rates. Where possible, we calculate whether the benefits of administering long-acting injectable medications outweigh the costs.
Download: Report
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December 2016
Initiative 502 (I-502) legalized recreational cannabis for adults in Washington State. The law directs the Washington State Institute for Public Policy (WSIPP) to conduct a benefit-cost evaluation of the implementation of I-502.

In this report we summarize the research evidence for 51 programs for the prevention or treatment of youth cannabis use. The programs reviewed include those nominated by DBHR as well as programs from WSIPP’s current set of inventories that have evidence for cannabis outcomes.
Download: Report Inventory
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September 2016
The 2013 Washington State Legislature directed the Washington State Institute for Public Policy (WSIPP) to create, in consultation with the Department of Social and Health Services (DSHS), University of Washington Evidence-Based Practice Institute (EBPI), University of Washington Alcohol and Drug Abuse Institute (ADAI), and the Washington Institute for Mental Health Research and Training (WIMHRT), an inventory of evidence-based, research-based, and promising practices.

The initial inventory of interventions and policies in adult mental health and chemical dependency services was published in May 2014. To view the May 2014 results, click here. An update to this inventory was published in January 2015.

While we were not directed by the legislature to update this inventory, a WSIPP Board-approved contract with the Division of Behavioral Health and Rehabilitation at the Department of Social and Health Services enabled WSIPP to review fourteen additional programs and update previously reviewed programs.
Download: Report Inventory
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June 2016
The 2012 Legislature passed E2SHB 2536 with the intention that “prevention and intervention services delivered to children and juveniles in the areas of mental health, child welfare, and juvenile justice be primarily evidence-based and research-based, and it is anticipated that such services will be provided in a manner that is culturally competent.”

The bill directs the Washington State Institute for Public Policy (WSIPP) and the University of Washington Evidence-Based Practice Institute (UW) to publish descriptive definitions and prepare an inventory of evidence-based, research-based, and promising practices and services, and to periodically update the inventory as more practices are identified. This is the sixth update to the September 30, 2012 publication. The accompanying report describes the inventory update process, as well as the ongoing technical assistance process by UW.
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September 2015
Initiative 502, passed by Washington voters in November 2012, legalized the limited adult possession and private consumption of cannabis, as well as its licensed production and sale. The initiative directs WSIPP to evaluate the impact of the law in a series of reports between 2015 and 2032.

It is too early in the history of I-502 to evaluate outcomes. This first required report describes the research plan for the overall study and presents preliminary data on the status of implementation of the law as of June 30, 2015. Ultimately, WSIPP’s evaluation will include a full descriptive study of implementation; an outcome study to identify causal effects of the law on a range of outcomes (e.g., substance use and abuse, health, criminal justice, traffic safety); and a benefit-cost analysis of the net economic impact of the law.
Download: Report
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January 2015
The 2013 Washington State Legislature directed the Washington State Institute for Public Policy (WSIPP) to create, in consultation with the Department of Social and Health Services (DSHS), University of Washington Evidence-Based Practice Institute (EBPI), University of Washington Alcohol and Drug Abuse Institute (ADAI), and the Washington Institute for Mental Health Research and Training (WIMHRT), an inventory of evidence-based, research-based, and promising practices.

The initial inventory of interventions and policies in adult mental health and chemical dependency services was published in May 2014. To view the May 2014 results, click here.

While we were not directed by the legislature to update this inventory, a WSIPP Board-approved contract with the Pew-MacArthur Results First Initiative enabled WSIPP to review four additional programs and update the literature on supported housing for chronically homeless adults.
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October 2014
Initiative 502, passed by Washington voters in November 2012, legalized recreational cannabis use for adults in the state. The initiative directs WSIPP to evaluate the policy in a series of reports between 2015 and 2032.

As part of this assignment, we reviewed the evaluation literature on 23 youth marijuana prevention and treatment programs. This review updates an earlier report that focused on a subset of the programs; to view the initial report click here.
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September 2014
Initiative 502, passed by Washington voters in November 2012, legalized recreational marijuana use for adults in the state. The initiative directed WSIPP to evaluate the policy by considering benefits and costs across a number of key areas including public health, public safety, and criminal justice.

As part of this assignment, we reviewed the evaluation literature on 13 youth prevention programs. These programs are on the state Department of Behavioral Health and Recovery’s preliminary list of evidence-based programs with marijuana prevention outcomes.

To view an update to this report, please click here.
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May 2014
The 2013 Legislature directed the Washington State Institute for Public Policy (WSIPP) to create, in consultation with the Department of Health and Social Services (DSHS), University of Washington Evidence-Based Practice Institute (EBPI), University of Washington Alcohol and Drug Abuse Institute (ADAI), and the Washington Institute for Mental Health Research and Training (WIMHRT), an inventory of evidence-based, research-based, and promising practices. The legislation also directs DSHS to use the inventory to develop a behavioral health improvement strategy and report the strategy to the governor and legislature.

This report describes the inventory of evidence-based, research-based, and promising practices in adult mental health and chemical dependency services.
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February 2014
In 1998, Washington State voters legalized the use of medical marijuana for certain medical purposes. Very little is known about patient access to medical marijuana and other implications of the law. At the local level, some cities and counties have prohibited collective cultivation of medicinal marijuana. Most Washington residents, however, live in areas that allow collective gardens.

This report describes local regulations regarding medical marijuana.
Download: Full Report
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