IDEAS home Printed from https://ideas.repec.org/a/wly/hlthec/v27y2018i10p1550-1566.html
   My bibliography  Save this article

The effect of HIV prevention products on incentives to supply condomless commercial sex among female sex workers in South Africa

Author

Listed:
  • Matthew Quaife
  • Peter Vickerman
  • Shanthi Manian
  • Robyn Eakle
  • Maria A. Cabrera‐Escobar
  • Sinead Delany‐Moretlwe
  • Fern Terris‐Prestholt

Abstract

Evidence suggests that economic factors play an important role in commercial sex work, in particular that condomless sex commands a price premium relative to condom‐protected sex. This paper explores whether the use of a new HIV prevention product, with 100% efficacy but modeled after pre‐exposure prophylaxis (PrEP), could change the price and quantity of condomless commercial sex supplied. We collected stated preference data from 122 HIV‐negative female sex workers in urban South Africa, using a repeated choice experiment to simulate the impact of using PrEP on choices. Results suggest that the price premium for condomless sex would decrease by 73% with PrEP use and the quantity of condomless sex is predicted to increase by a factor of 2.27. Act price does not significantly affect choices without protection but strongly influences choices under full HIV protection. The utility offered by condoms reduces by around 15% under PrEP use. Because new HIV prevention products do not protect against other STIs or pregnancy, the unintended consequences of introducing HIV prevention products should be closely monitored, whereas users should not face stigma or blame for reacting rationally to exogenous changes to market conditions.

Suggested Citation

  • Matthew Quaife & Peter Vickerman & Shanthi Manian & Robyn Eakle & Maria A. Cabrera‐Escobar & Sinead Delany‐Moretlwe & Fern Terris‐Prestholt, 2018. "The effect of HIV prevention products on incentives to supply condomless commercial sex among female sex workers in South Africa," Health Economics, John Wiley & Sons, Ltd., vol. 27(10), pages 1550-1566, October.
    • Handle: RePEc:wly:hlthec:v:27:y:2018:i:10:p:1550-1566
    DOI: 10.1002/hec.3784
    as

    Download full text from publisher

    File URL: https://doi.org/10.1002/hec.3784
    Download Restriction: no
    File URL: https://libkey.io/10.1002/hec.3784?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    References listed on IDEAS

    as
    1. Deering, K.N. & Amin, A. & Shoveller, J. & Nesbitt, A. & Garcia-Moreno, C. & Duff, P. & Argento, E. & Shannon, K., 2014. "A systematic review of the correlates of violence against sex workers," American Journal of Public Health, American Public Health Association, vol. 104(5), pages 42-54.
    2. Raj Arunachalam & Manisha Shah, 2013. "Compensated for Life: Sex Work and Disease Risk," Journal of Human Resources, University of Wisconsin Press, vol. 48(2), pages 345-369.
    3. Alexander Muravyev & Oleksandr Talavera, 2018. "Unsafe Sex in the City: Risk Pricing in the London Area," Scottish Journal of Political Economy, Scottish Economic Society, vol. 65(5), pages 528-549, November.
    4. Louviere,Jordan J. & Hensher,David A. & Swait,Joffre D. With contributions by-Name:Adamowicz,Wiktor, 2000. "Stated Choice Methods," Cambridge Books, Cambridge University Press, number 9780521788304.
    5. Mandy Ryan & Karen Gerard & Gillian Currie, 2012. "Using Discrete Choice Experiments in Health Economics," Chapters, in: Andrew M. Jones (ed.), The Elgar Companion to Health Economics, Second Edition, chapter 41, Edward Elgar Publishing.
    6. Dale Whittington & Stefano Pagiola, 2012. "Using Contingent Valuation in the Design of Payments for Environmental Services Mechanisms: A Review and Assessment," The World Bank Research Observer, World Bank, vol. 27(2), pages 261-287, August.
    7. Jonathan Robinson & Ethan Yeh, 2011. "Transactional Sex as a Response to Risk in Western Kenya," American Economic Journal: Applied Economics, American Economic Association, vol. 3(1), pages 35-64, January.
    8. Hess, Stephane & Adler, Thomas & Polak, John W., 2007. "Modelling airport and airline choice behaviour with the use of stated preference survey data," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 43(3), pages 221-233, May.
    9. Esther W. de Bekker‐Grob & Mandy Ryan & Karen Gerard, 2012. "Discrete choice experiments in health economics: a review of the literature," Health Economics, John Wiley & Sons, Ltd., vol. 21(2), pages 145-172, February.
    10. Paul Gertler & Manisha Shah & Stefano M. Bertozzi, 2005. "Risky Business: The Market for Unprotected Commercial Sex," Journal of Political Economy, University of Chicago Press, vol. 113(3), pages 518-550, June.
    11. Adela de la Torre & Arthur Havenner & Katherine Adams & Justin Ng, 2010. "Premium sex: Factors influencing the negotiated price of unprotected sex by female sex workers in Mexico," Journal of Applied Economics, Universidad del CEMA, vol. 13, pages 67-90, May.
    12. Hensher,David A. & Rose,John M. & Greene,William H., 2015. "Applied Choice Analysis," Cambridge Books, Cambridge University Press, number 9781107465923.
    13. Bliemer, Michiel C.J. & Rose, John M., 2011. "Experimental design influences on stated choice outputs: An empirical study in air travel choice," Transportation Research Part A: Policy and Practice, Elsevier, vol. 45(1), pages 63-79, January.
    14. Marina Giusta & Maria Tommaso & Steinar Strøm, 2009. "Who is watching? The market for prostitution services," Journal of Population Economics, Springer;European Society for Population Economics, vol. 22(2), pages 501-516, April.
    15. Li, Zheng & Hensher, David A., 2012. "Congestion charging and car use: A review of stated preference and opinion studies and market monitoring evidence," Transport Policy, Elsevier, vol. 20(C), pages 47-61.
    16. Philips, Hilde & Mahr, Dominik & Remmen, Roy & Weverbergh, Marcel & De Graeve, Diana & Van Royen, Paul, 2012. "Predicting the place of out-of-hours care—A market simulation based on discrete choice analysis," Health Policy, Elsevier, vol. 106(3), pages 284-290.
    17. Rao, Vijayendra & Gupta, Indrani & Lokshin, Michael & Jana, Smarajit, 2003. "Sex workers and the cost of safe sex: the compensating differential for condom use among Calcutta prostitutes," Journal of Development Economics, Elsevier, vol. 71(2), pages 585-603, August.
    18. Bliemer, Michiel C.J. & Rose, John M., 2013. "Confidence intervals of willingness-to-pay for random coefficient logit models," Transportation Research Part B: Methodological, Elsevier, vol. 58(C), pages 199-214.
    19. Adela de la Torre & Arthur Havenner & Katherine Adams & Justin Ng, 2010. "Premium Sex: Factors Influencing the Negotiated Price of Unprotected Sex by Female Sex Workers in Mexico," Journal of Applied Economics, Taylor & Francis Journals, vol. 13(1), pages 67-90, May.
    20. Harry Telser & Peter Zweifel, 2007. "Validity of discrete-choice experiments evidence for health risk reduction," Applied Economics, Taylor & Francis Journals, vol. 39(1), pages 69-78.
    21. Lena Edlund & Evelyn Korn, 2002. "A Theory of Prostitution," Journal of Political Economy, University of Chicago Press, vol. 110(1), pages 181-214, February.
    22. Matthew Quaife & Fern Terris-Prestholt & Gian Luca Di Tanna & Peter Vickerman, 2018. "How well do discrete choice experiments predict health choices? A systematic review and meta-analysis of external validity," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 19(8), pages 1053-1066, November.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Galárraga, Omar & Kuo, Caroline & Mtukushe, Bulelwa & Maughan-Brown, Brendan & Harrison, Abigail & Hoare, Jackie, 2020. "iSAY (incentives for South African youth): Stated preferences of young people living with HIV," Social Science & Medicine, Elsevier, vol. 265(C).
    2. S. Wilson Beckham & Norah L. Crossnohere & Margaret Gross & John F. P. Bridges, 2021. "Eliciting Preferences for HIV Prevention Technologies: A Systematic Review," The Patient: Patient-Centered Outcomes Research, Springer;International Academy of Health Preference Research, vol. 14(2), pages 151-174, March.
    3. Matthew Quaife & Fern Terris‐Prestholt & Zindoga Mukandavire & Peter Vickerman, 2021. "Modelling the effect of market forces on the impact of introducing human immunodeficiency virus pre‐exposure prophylaxis among female sex workers," Health Economics, John Wiley & Sons, Ltd., vol. 30(3), pages 659-679, March.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Matthew Quaife & Fern Terris‐Prestholt & Zindoga Mukandavire & Peter Vickerman, 2021. "Modelling the effect of market forces on the impact of introducing human immunodeficiency virus pre‐exposure prophylaxis among female sex workers," Health Economics, John Wiley & Sons, Ltd., vol. 30(3), pages 659-679, March.
    2. Andreas Lindenblatt & Peter Egger, 2017. "The long shadow of the Iron Curtain for female sex workers in German cities: Border effects and regional differences," Urban Studies, Urban Studies Journal Limited, vol. 54(3), pages 649-677, February.
    3. Shoji, Masahiro & Tsubota, Kenmei, 2022. "Sexual exploitation of trafficked children: Survey evidence from child sex workers in Bangladesh," Journal of Comparative Economics, Elsevier, vol. 50(1), pages 101-117.
    4. Hiroyuki Yamada & Yuki Kanayama & Kanako Yoshikawa & Kyaw Wai Aung, 2020. "Risk attitude, risky behavior, and price determination in the sex market: A case study of Yangon, Myanmar," Keio-IES Discussion Paper Series 2020-013, Institute for Economics Studies, Keio University.
    5. Wilson Nicholas, 2019. "The World’s Oldest Profession? Employment-Age Profiles from the Transactional Sex Market," IZA Journal of Labor Policy, Sciendo & Forschungsinstitut zur Zukunft der Arbeit GmbH (IZA), vol. 9(1), pages 1-17, June.
    6. Peter Egger & Andreas Lindenblatt, 2015. "Endogenous risk-taking and physical appearance of sex workers," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 16(9), pages 941-949, December.
    7. Hiroyuki Yamada & Yuki Kanayama & Kanako Yoshikawa & Kyaw Wai Aung, 2022. "Place‐based price differentials of prostitution: a case study in Yangon, Myanmar," Asian-Pacific Economic Literature, The Crawford School, The Australian National University, vol. 36(1), pages 17-29, May.
    8. Raj Arunachalam & Manisha Shah, 2013. "Compensated for Life: Sex Work and Disease Risk," Journal of Human Resources, University of Wisconsin Press, vol. 48(2), pages 345-369.
    9. Samuel Lee & Petra Persson, 2012. "Human Trafficking and Regulating Prostitution," Working Papers 12-07, New York University, Leonard N. Stern School of Business, Department of Economics.
    10. Manian, Shanthi, 2021. "Conflict and risky health behavior: Evidence from Mexico's drug war," Journal of Development Economics, Elsevier, vol. 148(C).
    11. Abel Brodeur & Warn N Lekfuangfu & Yanos Zylberberg, 2018. "War, Migration and the Origins of the Thai Sex Industry," Journal of the European Economic Association, European Economic Association, vol. 16(5), pages 1540-1576.
    12. Huls, Samare P.I. & de Bekker-Grob, Esther W., 2022. "Can healthcare choice be predicted using stated preference data? The role of model complexity in a discrete choice experiment about colorectal cancer screening," Social Science & Medicine, Elsevier, vol. 315(C).
    13. Haghani, Milad & Bliemer, Michiel C.J. & Rose, John M. & Oppewal, Harmen & Lancsar, Emily, 2021. "Hypothetical bias in stated choice experiments: Part I. Macro-scale analysis of literature and integrative synthesis of empirical evidence from applied economics, experimental psychology and neuroimag," Journal of choice modelling, Elsevier, vol. 41(C).
    14. Alexander Muravyev & Oleksandr Talavera, 2018. "Unsafe Sex in the City: Risk Pricing in the London Area," Scottish Journal of Political Economy, Scottish Economic Society, vol. 65(5), pages 528-549, November.
    15. de Bekker-Grob, E.W. & Donkers, B. & Bliemer, M.C.J. & Veldwijk, J. & Swait, J.D., 2020. "Can healthcare choice be predicted using stated preference data?," Social Science & Medicine, Elsevier, vol. 246(C).
    16. Masahiro Shoji & Kenmei Tsubota, 2018. "Sexual Exploitation of Trafficked Children: Evidence from Bangladesh," Working Papers 175, JICA Research Institute.
    17. Manda, Constantine, 2013. "Bang for Your Buck: STI Risk and Pregnancy Risk as Sources of the Price Premium for Unprotected Sex," MPRA Paper 52864, University Library of Munich, Germany.
    18. Phu Nguyen Van & Thierry Blayac & Dimitri Dubois & Sebastien Duchene & Marc Willinger & Bruno Ventelou, 2021. "Designing acceptable anti-COVID-19 policies by taking into account individuals’ preferences: evidence from a Discrete Choice Experiment," EconomiX Working Papers 2021-33, University of Paris Nanterre, EconomiX.
    19. Jonathan Robinson & Ethan Yeh, 2012. "Risk-Coping through Sexual Networks: Evidence from Client Transfers in Kenya," Journal of Human Resources, University of Wisconsin Press, vol. 47(1), pages 107-145.
    20. He, Guojun & Peng, Wenwei, 2022. "Guns and roses: Police complicity in organized prostitution," Journal of Public Economics, Elsevier, vol. 207(C).

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wly:hlthec:v:27:y:2018:i:10:p:1550-1566. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Wiley Content Delivery (email available below). General contact details of provider: http://www3.interscience.wiley.com/cgi-bin/jhome/5749 .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.