How Diadema, Brazil, Cut Murders in Half by Closing Bars Earlier

Diadema city, in the Greater São Paulo Diadema, an industrial city in the Greater São Paulo, in southeastern Brazil, with one of Brazil's highest homicide rates, has cut its murder rate in half in the last few years – mostly by establishing 11 p.m. as the closing time for bars and other places that sell alcohol. 

Researchers estimate more than 200 lives have been saved in the two years since bars went from staying open 24 hours a day to closing at 11 p.m.

The city averaged 22 homicides per month when bars were open 24 hours, but that rate declined to about 12 per month after bars began to close earlier.  The study findings are reported in the November issue of the American Journal of Public Health by researchers at the PIRE Prevention Research Center in Berkeley, California and at the University of São Paulo, Brazil and the University of Nottingham, England.

The researchers worked with government officials from Diadema to document the effects of the change. They examined the outcomes of limiting drinking hours in the city Diadema, which is about 12 miles from downtown São Paulo, the largest city in Brazil.

An industrial city with a population of 357,000, many of whom are low socio-economic status, Diadema had one of the highest homicide rates in Brazil, with 65% of such crimes considered alcohol related. 

Police statistics showed that most murders and other violent crime occurred between 11 p.m. and 6 a.m. near bars and retail alcohol outlets. In July 2002, a law was passed requiring that all alcohol establishments stop serving alcohol and close at 11 p.m. instead of staying open for 24 hours.

"Research has shown over and over that alcohol and violence are linked," said Dr. Joel Grube, Ph.D.., a study author and research scientist at PIRE. "The results of Diadema's efforts provide important evidence that this relationship need not be accepted passively.  Local communities have it within their power to prevent alcohol-related violence."

Researchers collected monthly police reports of homicides from local authorities to monitor the crime rate in Diadema. Leaders in Diadema worked both before and after the policy change to ensure that it had broad public support and was well-enforced. 

A public opinion poll before the policy change showed a community approval rate of 83%. Following the adoption of the municipal law, it was publicized throughout the community. Recent surveys indicate that 98% of Diadema residents know about the law, and 93% support the new alcohol policy. The mayor of Diadema was re-elected in 2004, with opinion polls suggesting increased popularity as a result of the new law.

"A wealth of research shows that policies that change how alcohol is sold can be highly effective in preventing alcohol-related problems.  This is another example of how those policies can work," Dr. Grube said.

Six months prior to the scheduled adoption of the new alcohol policy the municipal civil guard visited most alcohol retailers and discussed with the owners the proposed law and its application to alcohol sales.  Later, the owners were asked to sign a declaration that they were aware of the law and the legal consequences of violations.

Enforcement operations are carried out each evening.  An important component of the enforcement strategy includes regular meetings and reports to officers of the municipal civil guard on the effectiveness of enforcement in reducing community violence and informing officers directly of the survey data documenting citizen support for their enforcement efforts.

The analyses show that closing the bars at 11 p.m. produced a large and statistically significant reduction in homicides – almost nine murders a month in a city of 360,000 residents – an annual reduction of 106. This is a considerable public health achievement, especially in a country with such a high level of violent deaths. The data also suggest a possible reduction in assaults against women, although the effects were not statistically significant.

Between 1980 and 2004 the murder rate in Brazil more than doubled, from more than 11 to 27 per 100,000 per year. For comparison, the World Health Organization estimates that in 2000, the homicide rates per 100,000 people were one for the United Kingdom and six for the United States.


  • Show Comments (4)

  • bo

    If one would look at automobile accidents…
    and consider them a “violent death”, which imo they are….and causaed by downright “burrice”, no country on planet earth would come close to brazil in terms of “violent deaths”.

    I never cease to get amazed, on a daily basis, of the complete and utter mindless idiots that operate motor vehicles in this country. It should be criminal to be so fucking stupid.

  • shelly

    sorry , correction
    open later than 24h

    I thought it was past 11, then forgot to change the whole sentence. The law allows pubs to stay open 24h.

  • shelly


    I agree with you on all that you have said. However, this article is more about presenting a good program, which reduced, whether you want to agree or not, the murder rates in Diadema. Nottingham university is involved because there is a law up in the northern counties in England, allowing pubs to stay open later than 24h. The police and county legislators have found out, that there is an increase in murder rates and civil disobedience. The drinking law has cost some towns and countries-remember Wales and Scotland are a separate country, around 97 million pounds. Hence, Nottingham’s involvement in Diamantina. Next year our honorable Chancellor Gordon Brown, will decide if the current drinking law stays or goes. Diamantina will serve as example WHY the councils should revoke this (stupid) legislation. The facts are clear, you have missed the point. The murder rate is down. Obviously, this is by no means the ideal situation. Murder in Brazil is high and it is unacceptable -and it is reaching communities that were once considered safe, ex. Buzios and Camboriu in RS. Not only do researchers have to look at alcohol, but also poverty, drugs, low economic opportunities, exploitation, low wages, etc.

    Also, because I have lived in the UK, have citizenship, go there every year, I can say that the murder rate is actually going up in the UK. Cocaine use and drug related crime is actually higher there than here. Your statistical data 2000 does not reflect today’s reality. A lot has changed in the UK, Scotland for example, used to have the lowest murder rates, not anymore. I lived in Inverness for about a year in late 1994, now I wouldn’t be out and about after 11 pm. You will be luck to get home in one piece.
    I will give you an example. Crimes that are ” breach of peace”, used to be low. Now it is up, 196.5 at the Highland council. Compare that number to whole country 176.

  • ch.c.

    that a stat I have mentioned a few times in this forum is published again :
    “For comparison, the World Health Organization estimates that in 2000, the homicide rates per 100,000 people were one for the United Kingdom and six for the United States. “
    BRAZIL 27 !!!!!!!

    And then we read the junkies in this forum of how the USA is a violent country !!!!!!!

    And things are getting worse than 27 per 100’000 capita, since this was in 2000 and overall crimes rates are higher today than in 2000 !!!!!!

    If there is one country that nearly TRIPLED its crime rate in 25 years, except Brazil, please……NAME IT…..IF YOU CAN.
    If there is one country where 50 % of their youths deaths, aged 15-24, are due from violent deaths, except Brazil, please….NAME IT…IF YOU CAN !!!!
    If there is one country having deaths squads, mostly police men, killing thousands of children per year, except Brazil, please name it too, if you can.

    Yesssss…..Brazil is a human tragedy and a shame to humanity !

Your email address will not be published. Required fields are marked *

comment *

  • name *

  • email *

  • website *

This site uses Akismet to reduce spam. Learn how your comment data is processed.


You May Also Like

Brazilian Farmers Raise Goats in an All-Belongs-to-All Approach

In Santa Maria da Boa Vista, 611 kilometers (380 miles) away from the city ...

São Paulo, Brazil, governor Geraldo Alckmin

Brazil: The PSDB Takes the Hard Road

The manner in which the PSDB went about choosing its presidential candidate, Geraldo Alckmin, ...

Every 15 Seconds a Brazilian Woman Suffers Violence

Approximately 40,000 Brazilian women from all over the country gathered in  São Paulo on ...


Brazilian Indians who learned the Portuguese and received some schooling are being expelled from ...

Brazilian Farmers in Hong Kong Say Free Market Will Kill Family Farms

Representatives of Brazilian family farmers don’t want the Brazilian government to yield its autonomy ...

Japan Might Import 6 Billion Liters of Ethanol a Year from Brazil

Petrobras, Brazil’s state-run oil giant, reports it is studying the possibility of exporting sugarcane-based ...

Brazilian Amazon Little Entrepreneurs Get Their Own Microloans

Brazil is giving the green light to Accion International, a pioneer and leader in ...

Saudi National Soccer Team Willing to Go Training in Brazil

Saudi Arabia's deputy minister for Youth Welfare, prince Nawaf Bin Faiçal Bin Abdul Aziz ...

Biofuel Is Inevitable and Brazil Leads the Field, Says Lula

Brazil's discovery of an oil reserve in the Santos Basin in the south of ...

Brazil's electronic ballot box

Brazil: Election Gives Voters Chance to Clean Up Congress

Brazilian Congressmen have started to make some long-needed reforms in the House of Representatives. ...