SuperFreakonomics Book Club: Ask Sudhir Venkatesh About Street Prostitution


In the first installment of our virtual book club, Emily Oster answered your questions about her research (co-authored with Rob Jensen) which argues that the lives of rural women in India improved on several dimensions thanks to the widespread adoption of television.

That story appeared in our book’s introduction. Now we’re moving on to Chapter One.

We will probably feature a few Q&A’s with the subjects and researchers featured in this chapter, which is described in the Table of Contents like this:

1. How is a street prostitute like a department-store Santa?

In which we explore the various costs of being a woman.

Meet LaSheena, a part- time prostitute … One million dead “witches” … The many ways in which females are punished for being born female … Even Radcliffe women pay the price … Title IX creates jobs for women; men take them … 1 of every 50 women a prostitute … The booming sex trade in old-time Chicago … A survey like no other … The erosion of prostitute pay … Why did oral sex get so cheap? … Pimps versus Realtors … Why cops love prostitutes … Where did all the schoolteachers go? … What really accounts for the male-female wage gap? … Do men love money the way women love kids? … Can a sex change boost your salary? … Meet Allie, the happy prostitute; why aren’t there more women like her?

Today we concentrate on “a survey like no other,” and invite you to ask questions of the man behind that survey, Sudhir Venkatesh. He is a sociologist at Columbia University who did his graduate work at the University of Chicago and conducted years’ worth of valuable, fascinating field work there.

One chapter in Freakonomics was based on a series of papers Sudhir wrote with Steve Levitt about the economics of a crack-selling gang. (He did a Q&A on that topic here; and he wrote a book, Gang Leader for a Day, about that research.)

In SuperFreakonomics, we write about the field work that Sudhir conducted with street prostitutes in Chicago. There is a lot to be said about the findings of the research (mostly concerning prices and services) as well as methodology, the historical changes and context of street prostitution, and even how the prostitutes engage in what economists call price discrimination, or charging different prices for the same product.

Sudhir has agreed to field your questions about his research, so leave them in the comments section below. As always, we’ll post the answers shortly. For those of you who haven’t yet read this chapter, here are a few relevant excerpts:

Venkatesh, knowing that traditional survey methods don’t necessarily produce reliable results for a sensitive topic like prostitution, tried something different: real-time, on-the-spot data collection. He hired trackers to stand on street corners or sit in brothels with the prostitutes, directly observing some facets of their transactions and gathering more intimate details from the prostitutes as soon as the customers were gone.

Most of the trackers were former prostitutes — an important credential because such women were more likely to get honest responses. Venkatesh also paid the prostitutes for participating in the study. If they were willing to have sex for money, he reasoned, surely they’d be willing to talk about having sex for money. And they were. Over the course of nearly two years, Venkatesh accumulated data on roughly 160 prostitutes in three separate South Side neighborhoods, logging more than 2,200 sexual transactions.


During Venkatesh’s study, six pimps managed the prostitution in West Pullman, and he got to know each of them. They were all men. In the old days, prostitution rings in even the poorest Chicago neighborhoods were usually run by women. But men, attracted by the high wages, eventually took over — yet another example in the long history of men stepping in to outearn women.

These six pimps ranged in age from their early 30’s to their late 40’s and ‘were doing pretty well,’ Venkatesh says, making roughly $50,000 a year. Some also held legit jobs — car mechanic or store manager — and most owned their homes. None were drug addicts.

One of their most important roles was handling the police. Venkatesh learned that the pimps had a good working relationship with the police, particularly with one officer, named Charles. When he was new on the beat, Charles harassed and arrested the pimps. But this backfired. ‘When you arrest the pimps, there’ll just be fighting to replace them,’ Venkatesh says, ‘and the violence is worse than the prostitution.’


How do the Chicago street prostitutes price-discriminate? As Venkatesh learned, they use different pricing strategies for white and black customers. When dealing with blacks, the prostitutes usually name the price outright to discourage any negotiation. (Venkatesh observed that black customers are more likely than whites to haggle — perhaps, he reasoned, because they’re more familiar with the neighborhood and therefore know the market better.) When doing business with white customers, meanwhile, the prostitute makes the man name a price, hoping for a generous offer. As evidenced by the black-white price differential in the data, this strategy seems to work pretty well.


Of all the tricks turned by the prostitutes he tracked, roughly 3 percent were freebies given to police officers. The data don’t lie: a Chicago street prostitute is more likely to have sex with a cop than to be arrested by one.

Leave A Comment

Comments are moderated and generally will be posted if they are on-topic and not abusive.



View All Comments »
  1. Another David says:

    On the standard 1-10 scale, how hot is the average street prostitute? Standard deviation?

    Thumb up 0 Thumb down 0
  2. Abhay says:

    Have you shared the results of your study with top CPD officials and what has been their reaction?

    Thumb up 0 Thumb down 0
  3. Alex Churchill says:

    The Internet has revolutionized prostitution. In short, is street prostitution a nearly dead industry? Also, what will become of pimps? I realize there will always be a certain base level of street prostitutes to serve addicts and thrill seekers, but certainly the sample size must be getting smaller every day.

    Thumb up 0 Thumb down 0
  4. Steve says:

    Were there any common traits to the part-time “patriotic” hookers? (Age, marital status, children, employment status,etc…)

    Thumb up 0 Thumb down 0
  5. Dober says:

    Hi Sudhir,

    I really enjoyed your book, Gang Leader for a Day.

    How would legalization of prostitution affect the sex trade, in terms of economics (supply, demand, price) and safety (health, violence)?

    What proportion of the sex trade involves women being forced into it, versus choosing the profession?

    What proportion of sex trade workers are drug users, and is that something that tends to preceed entering the drug trade or vice versa?

    Keep up the fascinating work.



    Thumb up 0 Thumb down 0
  6. anonymous says:

    In the book, Levitt and Dubner estimate the size of the “pimpact” – the added value of pimp management – using variation over time in working for a pimp and prostitute’s earnings. What typically is happening in a street prostitute’s life that might cause her to leave employment with a pimp? Is she usually fired for some reason (and if so, what are typical violations that would get her fired), or does she leave for her own reasons?

    Thumb up 0 Thumb down 0
  7. anonymous says:

    In the recent battle to get prostitution re-criminalized in the state of Rhode Island, many people involved, such as Donna Hughes, argued that prostitution in Rhode Island was intimately related to the global sex trafficking network. To what degree do you see sex trafficking (involving non-consensual prostitution) as an “industry” related to the underlying markets for consensual prostitution? Are they segmented, or are they connected, and if they are connected, how? Do clients of sex trafficked women in the United States, for instance, realize they are seeing a trafficked woman? Just how bad is this problem, and what should the United States do to combat it?

    Thumb up 0 Thumb down 0
  8. gcc says:

    What insights do you have into trafficking and prostitution in the US?

    Thumb up 0 Thumb down 0