Study international drop in worldwide 2021

City living has been dramatically curtailed by COVID-19, and crime is a big part of city life," said senior study author Manuel Eisner, director of the Violence Research Center at the University of Cambridge in the United Kingdom.

No drinkers spilling into the streets after nights out at bars and pubs. No days spent in shops and cafés or at the racetrack or football match. Some cities even introduced curfews. It choked the opportunism that fuels so much urban crime," Eisner added in a university news release.

On average, daily assaults in the 27 cities fell by 35%, robberies by an average 46%, and other types of theft such as pickpocketing and shoplifting by an average of 47%, the study found.

In comparison, homicides dropped 14% on average across the cities studied.

First author Amy Nivette, of the University of Utrecht in the Netherlands, noted several factors were involved in the homicide data. For one, a significant percentage of homicides in many societies are committed in the home.

The behavior of these gangs is likely to be less sensitive to the changes enforced by a lockdown

Nonetheless, three cities where gang crime drives violence — Rio de Janeiro; Cali, Colombia; and Lima, Peru — all saw significant drops in daily homicides as a result of COVID-19 policies.

Overall, stricter lockdowns led to larger declines in crime, and reductions in crime associated with lockdowns tended to be steep but temporary, the researchers reported. A maximum drop occurred about two to five weeks after a stay-at-home order went into effect, followed by a gradual return to previous levels, according to the report published online June 2 in the journal Nature Human Behaviour.

Eisner said, "We found the largest reductions in crimes where motivated offenders and suitable victims converge in a public space. There would be far fewer potential targets in the usual crime hotspots such as streets with lots of nightclubs."

The researchers found no link between crime rates and pandemic-related measures such as school closures or economic supports.

But they found dramatic differences from city to city

For example, while burglary rates plunged 84% in Lima, they rose 38% in San Francisco.

The measures taken by governments across the world to control COVID-19 provided a series of natural experiments, with major changes in routines, daily encounters and use of public space over entire populations," Eisner said. "The pandemic has been devastating, but there are also opportunities to better understand social processes, including those involved in causing city-wide crime levels.

had at least one welcome upside: a significant drop in crime in cities worldwide, according to an international study. Pandemic Silver Lining: Global Decline in Urban Crime found big declines types of crimes of homicide.

Researchers analyzed crime data from 27 metro areas (including Chicago; London; Sao Paulo; Barcelona, Spain; Tel Aviv, Israel; and Brisbane, Australia) and found big declines in most types of crimes, with the notable exception of homicide.

When choosing safer activities, consider how COVID-19 is spreading in your community, the number of people participating in the activity, and the location of the activity.