Freedomnomics

.

.

.

.

.

Article published Sunday, March 25, 2007, at Fox News.

The Crime-Statistics Con Job

By John R. Lott Jr.

It is a remarkable con job.

Over the last six months, the Police Executive Research Forum, the chief executives of primarily large police departments, has gotten the media concerned that the country is threatened by a sudden upsurge in violent crime and murder. A New York Times story on March 9th started the current round of hysteria with the headline that “Violent Crime in Cities Show Sharp Surge.”

An earlier front page story in January in USA Today caused a similar ruckus.

One wonders whether the reporters ever thought of getting a critical comment for their story.

The Police Executive Research Forum report sounded the alarm: “The FBI statistics reflect the largest single year percent increase in violent crime in 14 years.”

It becomes a lot less scary when one realizes that the violent crime rate fell for 13 straight years, a total drop of 39 percent, before increasing in 2005 by less than 1 percent.

The Forum even referred to this miniscule one-year increase as a “trend.”

Murder rates did rise from 5.5 per 100,000 people in 2004 to 5.6 in 2005, but they were a little higher a couple of years earlier -- 5.7 in 2003 -- and 5.6 in 2001 and 2002.

Murder rates have essentially remained unchanged since 2000 after falling from a peak of 9.8 in 1991.

With crime numbers such as these, it is strange that the Forum could get so many people talking about a surge, whether it be nationally or just in cities.

But what the Forum does with the numbers is instantly recognizable for anyone with even a little training. With the national data, they report the change in the number of crimes, not the change in the crime rate (see their Box 1). Of course, the total number of crimes may go up in some years but so has the population.

Further, the Forum very selectively picked what crime categories to report.

For example, they reported murder, robbery and aggravated assault, but not rape. Why? Could it be that the number of rapes as well as the rape rate both fell?

But the worst is their mangling the data for city crime. They selectively pick 56 jurisdictions (mainly cities but some counties) with populations over 70,000. There are 253 cities with over 100,000 people.

The news bite that the media focused on is the claim that murder rates increased by 6.8 percent from 2004 to 2005, 10.2 percent from 2004 to 2006.

Six of the top 20 most populous cities that they just happened to leave out had smaller increases or even declines in murders from 2004 to 2006.

There is absolutely no excuse for leaving out these or other cities. After all, local newspapers regularly report how many murders their city had the previous year during the first week or two of each January.

A few hours of web searches will easily get you virtually all the 50 most populous cities. Many other cities are available as well.

But how could any researcher reasonably pretend that they didn’t know the number of murders in New York City? New York City, because of its large population, has the most murders in the country.

If the Forum had also included just that one additional city, it would have brought down their estimated murder growth rate by an entire percentage point.

The crime data for all the cities over 100,000 people are readily available from the FBI for 2004 and 2005.

If you look at them all and not the small group the Forum selected, the murder rate rose by only 2 percent, less than a third of what their selective sample implies.

Sure some cities do have serious crime problems, problems that are indeed getting worse. But that there are also cities where crime rates have plummeted.

The problems that particular cities face are more local than national in nature. Some cities such as Philadelphia, have poorly managed police departments and have seen big drops in arrest rates. It is not surprising that violent crime and murder rates have also gone up.

Not surprisingly, last fall the Forum ended its hysterical claims of a gathering crime “storm” with a call for more money for their member’s police departments.

There may be good reasons why cities should spend more money on police and prisons, but it should be justified by real numbers.

The one victim of all this ruckus over the crime wave should be the Police Executive Research Forum's credibility.

*John Lott is the author of the forthcoming Freedomnomics and the Dean’s Visiting Professor at the State University of New York at Binghamton.

Home

Johnlott.org (description of book, downloadable data sets, and discussions of previous controversies)

Academic papers:

Social Science Research Network

Book Reviews:

For a list of book reviews on The Bias Against Guns, click here.

---------------------------------
List of my Op-eds
---------------------------------

Posts by topic

Appalachian law school attack

Baghdad murder rate

Arming Pilots

Fraudulent website pretending to be run by me

The Merced Pitchfork Killings and Vin Suprynowicz's quote

Ayres and Donohue

Stanford Law Review

Mother Jones article

Links

Craig Newmark

Eric Rasmusen

William Sjostrom

Dr. T's EconLinks.com

Interview with National Review Online

Lyonette Louis-Jacques's page on Firearms Regulation Worldwide

The End of Myth: An Interview with Dr. John Lott

Cold Comfort, Economist John Lott discusses the benefits of guns--and the hazards of pointing them out.

An interview with John R. Lott, Jr. author of More Guns, Less Crime: Understanding Crime and Gun Control Laws

Some data not found at www.johnlott.org:

Updated Media Analysis of Appalachian Law School Attack

Since the first news search was done additional news stories have been added to Nexis:

There are thus now 218 unique stories, and a total of 294 stories counting duplicates (the stories in yellow were duplicates): Excel file for general overview and specific stories. Explicit mentions of defensive gun use increase from 2 to 3 now.

Journal of Legal Studies paper on spoiled ballots during the 2000 Presidential Election

Data set from USA Today, STATA 7.0 data set

"Do" File for some of the basic regressions from the paper