IDEAS home Printed from https://ideas.repec.org/a/sae/jospec/v23y2022i7p950-975.html

The Effect of the Crowd on Home Bias: Evidence from NBA Games During the COVID-19 Pandemic

Author

Listed:
  • Hua Gong

Abstract

The present study examines a specific type of referee biases, home bias, and analyzes how the presence of fans affects home bias by using NBA games played in empty arenas during the COVID-19 pandemic in the 2020–2021 season and matches played before the pandemic from 2017 to 2020. This research also uses a unique data set from NBA Last Two Minute Reports to assess referees’ performance at the play level. The findings show crowd support does not cause referees to treat home and away teams differently in crucial situations during the NBA regular season, contrary to the results in most prior studies.

Suggested Citation

  • Hua Gong, 2022. "The Effect of the Crowd on Home Bias: Evidence from NBA Games During the COVID-19 Pandemic," Journal of Sports Economics, , vol. 23(7), pages 950-975, October.
    • Handle: RePEc:sae:jospec:v:23:y:2022:i:7:p:950-975
    DOI: 10.1177/15270025211073337
    as

    Download full text from publisher

    File URL: https://journals.sagepub.com/doi/10.1177/15270025211073337
    Download Restriction: no
    File URL: https://libkey.io/10.1177/15270025211073337?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. Katherine G. Yewell & Steven B. Caudill & Franklin G. Mixon, Jr., 2014. "Referee Bias and Stoppage Time in Major League Soccer: A Partially Adaptive Approach," Econometrics, MDPI, vol. 2(1), pages 1-19, February.
    2. Endrich, Marek & Gesche, Tobias, 2020. "Home-bias in referee decisions: Evidence from “Ghost Matches” during the Covid19-Pandemic," Economics Letters, Elsevier, vol. 197(C).
    3. Bryson R. Pope & Nolan G. Pope, 2015. "Own-Nationality Bias: Evidence From Uefa Champions League Football Referees," Economic Inquiry, Western Economic Association International, vol. 53(2), pages 1292-1304, April.
    4. Sutter, Matthias & Kocher, Martin G., 2004. "Favoritism of agents - The case of referees' home bias," Journal of Economic Psychology, Elsevier, vol. 25(4), pages 461-469, August.
    5. Luke S. Benz & Michael J. Lopez, 2023. "Estimating the change in soccer’s home advantage during the Covid-19 pandemic using bivariate Poisson regression," AStA Advances in Statistical Analysis, Springer;German Statistical Society, vol. 107(1), pages 205-232, March.
    6. Thomas Dohmen & Jan Sauermann, 2016. "Referee Bias," Journal of Economic Surveys, Wiley Blackwell, vol. 30(4), pages 679-695, September.
    7. Luis Garicano & Ignacio Palacios-Huerta & Canice Prendergast, 2005. "Favoritism Under Social Pressure," The Review of Economics and Statistics, MIT Press, vol. 87(2), pages 208-216, May.
    8. Vincenzo Scoppa, 2008. "Are subjective evaluations biased by social factors or connections? An econometric analysis of soccer referee decisions," Empirical Economics, Springer, vol. 35(1), pages 123-140, August.
    9. Scoppa, Vincenzo, 2021. "Social pressure in the stadiums: Do agents change behavior without crowd support?," Journal of Economic Psychology, Elsevier, vol. 82(C).
    10. George A. Akerlof, 1980. "A Theory of Social Custom, of which Unemployment may be One Consequence," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 94(4), pages 749-775.
    11. Ferraresi, Massimiliano & Gucciardi, Gianluca, 2021. "Who chokes on a penalty kick? Social environment and individual performance during Covid-19 times," Economics Letters, Elsevier, vol. 203(C).
    12. Ai, Chunrong & Norton, Edward C., 2003. "Interaction terms in logit and probit models," Economics Letters, Elsevier, vol. 80(1), pages 123-129, July.
    13. Michela Ponzo & Vincenzo Scoppa, 2018. "Does the Home Advantage Depend on Crowd Support? Evidence From Same-Stadium Derbies," Journal of Sports Economics, , vol. 19(4), pages 562-582, May.
    14. Babatunde Buraimo & David Forrest & Robert Simmons, 2010. "The 12th man?: refereeing bias in English and German soccer," Journal of the Royal Statistical Society Series A, Royal Statistical Society, vol. 173(2), pages 431-449, April.
    15. Bruno Rocha & Fábio Sanches & Igor Souza & Jos� Carlos Domingos da Silva, 2013. "Does monitoring affect corruption? Career concerns and home bias in football refereeing," Applied Economics Letters, Taylor & Francis Journals, vol. 20(8), pages 728-731, May.
    16. Joseph Price & Marc Remer & Daniel F. Stone, 2012. "Subperfect Game: Profitable Biases of NBA Referees," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 21(1), pages 271-300, March.
    17. Steven B. Caudill & Franklin G. Mixon & Scott Wallace, 2014. "Life on the Red Carpet: Star Players and Referee Bias in the National Basketball Association," International Journal of the Economics of Business, Taylor & Francis Journals, vol. 21(2), pages 245-253, July.
    18. Peter Dawson & Stephen Dobson & John Goddard & John Wilson, 2007. "Are football referees really biased and inconsistent?: evidence on the incidence of disciplinary sanction in the English Premier League," Journal of the Royal Statistical Society Series A, Royal Statistical Society, vol. 170(1), pages 231-250, January.
    19. Joseph Price & Justin Wolfers, 2010. "Racial Discrimination Among NBA Referees," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 125(4), pages 1859-1887.
    20. Pettersson-Lidbom, Per & Priks, Mikael, 2010. "Behavior under social pressure: Empty Italian stadiums and referee bias," Economics Letters, Elsevier, vol. 108(2), pages 212-214, August.
    21. Babatunde Buraimo & Rob Simmons & Marek Maciaszczyk, 2012. "Favoritism And Referee Bias In European Soccer: Evidence From The Spanish League And The Uefa Champions League," Contemporary Economic Policy, Western Economic Association International, vol. 30(3), pages 329-343, July.
    22. Dawson, Peter & Dobson, Stephen, 2010. "The influence of social pressure and nationality on individual decisions: Evidence from the behaviour of referees," Journal of Economic Psychology, Elsevier, vol. 31(2), pages 181-191, April.
    23. Bryson, Alex & Dolton, Peter & Reade, J. James & Schreyer, Dominik & Singleton, Carl, 2021. "Causal effects of an absent crowd on performances and refereeing decisions during Covid-19," Economics Letters, Elsevier, vol. 198(C).
    24. Bernheim, B Douglas, 1994. "A Theory of Conformity," Journal of Political Economy, University of Chicago Press, vol. 102(5), pages 841-877, October.
    25. Kai Fischer & Justus Haucap, 2021. "Does Crowd Support Drive the Home Advantage in Professional Football? Evidence from German Ghost Games during the COVID-19 Pandemic," Journal of Sports Economics, , vol. 22(8), pages 982-1008, December.
    26. Thomas J. Dohmen, 2008. "The Influence Of Social Forces: Evidence From The Behavior Of Football Referees," Economic Inquiry, Western Economic Association International, vol. 46(3), pages 411-424, July.
    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. Shao, Wen-Chao & Zhang, Han & Chou, Li-Chen & Ye, Xi-Xi, 2023. "Comparing athletes’ mastery of salary information before and during the COVID-19 pandemic: Evidence from the national basketball association," Economic Modelling, Elsevier, vol. 128(C).
    2. Jin, Jiang & Yang, Di & Liu, Yaokai & He, Lihua, 2025. "The impact of foreign player absence on domestic player performance: A COVID-19 natural experiment," Sports Economics Review, Elsevier, vol. 12(C).
    3. Mauro Caselli & Paolo Falco & Babak Somekh, 2024. "Inside the NBA Bubble: how Black players performed better without fans," Journal of Population Economics, Springer;European Society for Population Economics, vol. 37(2), pages 1-20, June.
    4. Juan Luis Jiménez & Jorge Valido & Marcos Jiménez, 2025. "The Effects of Crowds on Professional European Basketball Teams," Journal of Sports Economics, , vol. 26(4), pages 377-396, May.
    5. Butler, David & Butler, Robert, 2023. "Ghost games and ex-post viewing preferences for the English Premier League: Evidence from YouTube highlights," Sports Economics Review, Elsevier, vol. 2(C).
    6. Ariel R Belasen & Alan T Belasen & Alexandre M Olbrecht, 2025. "With the Game on the (Betting) Line: NBA Referee Performance in the Last Two Minutes," Journal of Sports Economics, , vol. 26(8), pages 913-935, December.
    7. Adam Cook, 2026. "The 12th Man Plays Defense: The Effects of Heterogeneous COVID-19 NFL Stadium Attendance Restrictions," Journal of Sports Economics, , vol. 27(1), pages 27-56, January.
    8. Camilo Abbate & Jeffrey Cross & Richard Uhrig, 2025. "Video assistant referee and home field advantage: Implications for referee bias," Southern Economic Journal, John Wiley & Sons, vol. 91(3), pages 1176-1196, January.

    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. J. James Reade & Dominik Schreyer & Carl Singleton, 2022. "Eliminating supportive crowds reduces referee bias," Economic Inquiry, Western Economic Association International, vol. 60(3), pages 1416-1436, July.
    2. David Butler & Robert Butler & Carl Singleton, 2026. "Objective Calls Under the Spotlight: Referee Consistency and Behaviour on Football's Biggest Stage," Journal of Sports Economics, , vol. 27(2), pages 171-213, February.
    3. Kocsoy, Alperen, 2025. "Referee bias in football: Actual vs. expected additional time," Sports Economics Review, Elsevier, vol. 9(C).
    4. Thomas Dohmen & Jan Sauermann, 2016. "Referee Bias," Journal of Economic Surveys, Wiley Blackwell, vol. 30(4), pages 679-695, September.
    5. Scoppa, Vincenzo, 2021. "Social pressure in the stadiums: Do agents change behavior without crowd support?," Journal of Economic Psychology, Elsevier, vol. 82(C).
    6. Andrea Albanese & Stijn Baert & Olivier Verstraeten, 2020. "Twelve eyes see more than eight. Referee bias and the introduction of additional assistant referees in soccer," PLOS ONE, Public Library of Science, vol. 15(2), pages 1-15, February.
    7. Dmitry Dagaev & Sofia Paklina & J. James Reade & Carl Singleton, 2024. "The Iron Curtain and Referee Bias in International Football," Journal of Sports Economics, , vol. 25(1), pages 126-151, January.
    8. Paul Bose & Eberhard Feess & Helge Mueller, 2022. "Favoritism towards High-Status Clubs: Evidence from German Soccer," The Journal of Law, Economics, and Organization, Oxford University Press, vol. 38(2), pages 422-478.
    9. Ulrike Holder & Thomas Ehrmann & Arne König, 2022. "Monitoring experts: insights from the introduction of video assistant referee (VAR) in elite football," Journal of Business Economics, Springer, vol. 92(2), pages 285-308, February.
    10. J. James Reade & Dominik Schreyer & Carl Singleton, 2020. "Echoes: what happens when football is played behind closed doors?," Economics Discussion Papers em-dp2020-14, Department of Economics, University of Reading.
    11. Thadeu Gasparetto & Kirill Loktionov, 2023. "Does the Video Assistant Referee (VAR) mitigate referee bias on professional football?," PLOS ONE, Public Library of Science, vol. 18(11), pages 1-11, November.
    12. Kai Fischer & Justus Haucap, 2022. "Home advantage in professional soccer and betting market efficiency: The role of spectator crowds," Kyklos, Wiley Blackwell, vol. 75(2), pages 294-316, May.
    13. Chowdhury, Subhasish M. & Jewell, Sarah & Singleton, Carl, 2024. "Can awareness reduce (and reverse) identity-driven bias in judgement? Evidence from international cricket," Journal of Economic Behavior & Organization, Elsevier, vol. 226(C).
    14. Michael Christian Leitner & Frank Daumann & Florian Follert & Fabio Richlan, 2023. "The cauldron has cooled down: a systematic literature review on home advantage in football during the COVID-19 pandemic from a socio-economic and psychological perspective," Management Review Quarterly, Springer, vol. 73(2), pages 605-633, June.
    15. Finn Spilker & Christian Deutscher & Marius Ötting & Hendrik Sonnabend, 2025. "Favouritism, social pressure, and gender," Oxford Economic Papers, Oxford University Press, vol. 77(3), pages 754-770.
    16. Varela-Quintana, Carlos & Sánchez, Luis Carlos & del Corral, Julio, 2025. "The effect of social pressure when judging favorites and underdogs," Journal of Economic Behavior & Organization, Elsevier, vol. 236(C).
    17. Alma Cohen & Zvika Neeman & Florian Auferoth, 2024. "Judging under Public Pressure," The Review of Economics and Statistics, MIT Press, vol. 106(1), pages 151-166, January.
    18. Hiroshi Morita & Shota Araki, 2023. "Social pressure in football matches: an event study of ‘Remote Matches’ in Japan," Applied Economics Letters, Taylor & Francis Journals, vol. 30(11), pages 1522-1525, June.
    19. Kai Fischer & Justus Haucap, 2021. "Does Crowd Support Drive the Home Advantage in Professional Football? Evidence from German Ghost Games during the COVID-19 Pandemic," Journal of Sports Economics, , vol. 22(8), pages 982-1008, December.
    20. Carl Singleton & J. James Reade & Dominik Schreyer, 2023. "A decade of violence and empty stadiums in Egypt: when does emotion from the terraces affect behaviour on the pitch?," Empirical Economics, Springer, vol. 65(3), pages 1487-1507, September.

    More about this item

    Keywords

    ;
    ;
    ;
    ;

    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:sae:jospec:v:23:y:2022:i:7:p:950-975. 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: SAGE Publications (email available below). General contact details of provider: .

    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.