PPIC Logo Independent, objective, nonpartisan research

Search Results

Filters Sort by:

Racial Disparities in Traffic Stops

Traffic stops are a key factor in racial disparities in law enforcement encounters. PPIC researcher Magnus Lofstrom will present new findings on how disparities in traffic stops differ across agency type, type of traffic violation, and time of day. Then a panel of state and local experts will discuss the challenges of traffic enforcement and alternative approaches that could potentially improve officer and civilian safety while reducing racial inequities.


Racial Disparities in Traffic Stops

By Magnus Lofstrom, Joseph Hayes, Brandon Martin, Deepak Premkumar

Traffic stops have emerged as a key driver of racial disparities in law enforcement and an area of potential reform. Our new report examines whether certain types of traffic stops could be enforced in alternative ways that reduce racial disparities and risks to officers and civilians without jeopardizing public safety.

Policy Brief

Policy Brief: Racial Disparities in Traffic Stops

By Magnus Lofstrom, Joseph Hayes, Brandon Martin, Deepak Premkumar

Our findings suggest that nighttime traffic stops for non-moving violations—especially those made by local police and sheriff departments—deserve consideration for alternative enforcement strategies. However, any changes need to be balanced against the possibility of hampering efforts to confiscate dangerous contraband, especially firearms.

blog post

Solid Majorities of Californians View Crime as a Problem

By Dean Bonner

Nearly two in three Californians, including solid majorities across most regions of the state, say that violence and street crime in their community are a problem. Three in ten statewide say violence and street crime are a big problem, an increase from prior to the pandemic.



The high cost of housing poses a threat to the state’s economic future and widens inequality. Not surprisingly, Californians identify housing affordability and homelessness as among the most important issues facing the state. PPIC examines current and emerging housing needs and highlights the role of public policies in addressing the state’s housing crisis.

blog post

Mass Shootings in California

By Heather Harris

Although California’s mass shooting homicide rate is lower than the national average, a mass shooting occurs here every eight days on average.

blog post

Crime Trends in Context

By Magnus Lofstrom

At a town hall held by Congressman Mark DeSaulnier, PPIC’s Magnus Lofstrom discussed what research has found about the consequences of key criminal justice reforms and the pattern of long-term crime trends in California and Contra Costa County.

blog post

Two Years of Wide Variation in Crime Trends

By Magnus Lofstrom, Brandon Martin

Increases in crime during the first year and a half of the pandemic—particularly in homicide and aggravated assault—have been troubling, but most crime numbers are now relatively close to the low levels seen over the last decade.

Search results are limited to 100 items. Please use the Refine Results tool if you are not finding what you are looking for.