SANTA MONICA, California — A nonprofit think tank on Monday retracted a widely reported study that linked last year's closing of hundreds of medical marijuana dispensaries in Los Angeles to a rise in crime rates in surrounding neighborhoods
Santa Monica-based Rand Corp. said in a statement that questions raised after the study was released last month prompted an unusual internal review.
Researchers relied on a commercial crime mapping service, believing it included information from various jurisdictions, including the Los Angeles Police
Department. However, that agency did not give data to the service.
"That review determined the crime data used in the analysis are insufficient to answer the questions targeted by the study," the statement said.
The study looked at crime reports for neighborhoods surrounding 600 dispensaries in the 10 days before and 10 days after Los Angeles officials shuttered the pot clinics last summer after a new ordinance went into effect.
http://www.msnbc.msn.com/id/45023116/ns/health-health_care/#