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

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.

Keywords

referee bias home bias COVID-19 crowd support

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References

Norton

E. C.

(2003). Interaction terms in logit and probit models. Economics Letters, 80(1), 123–129. https://doi.org/10.1016/S0165-1765(03)00032-6

Akerlof

G. A.

(1980). A theory of social custom, of which unemployment may be one consequence. The Quarterly Journal of Economics, 94(4), 749–775. https://doi.org/10.2307/1885667

Becker

G. S.

Murphy

K. M.

(2000). Social economics: Market behavior in a social environment. Harvard University Press.

Benz

L. S.

Lopez

M. J.

(2021). Estimating the change in soccer's home advantage during the COVID-19 pandemic using bivariate poisson regression. AStA Advances in Statistical Analysis, 1–28. https://doi.org/10.1007/s10182-021-00413-9

Bernheim

B. D.

(1994). A theory of conformity. Journal of Political Economy, 102(5), 841–877. https://doi.org/10.1086/261957

Boyko

R. H.

Boyko

A. R.

Boyko

M. G.

(2007). Referee bias contributes to home advantage in English premiership football. Journal of Sports Sciences, 25(11), 1185–1194. https://doi.org/10.1080/02640410601038576

Bryson

Dolton

Reade

J. J.

Schreyer

Singleton

(2021). Causal effects of an absent crowd on performances and refereeing decisions during COVID-19. Economics Letters, 198, 109664. https://doi.org/10.1016/j.econlet.2020.109664

Buraimo

Forrest

Simmons

(2010). The 12th man?: Refereeing bias in English and German soccer. Journal of the Royal Statistical Society: Series A (Statistics in Society), 173(2), 431–449. https://doi.org/10.1111/j.1467-985X.2009.00604.x

Buraimo

Semmelroth

Simmons

(2017). Referee bias in football. In Albert

Glickman

M. E.

Swartz

T. B.

Koning

R. H.

(Eds.), Handbook of statistical methods and analyses in sports (pp. 417–440). Chapman and Hall/CRC.

10.

Buraimo

Simmons

Maciaszczyk

(2012). Favoritism and referee bias in european soccer: Evidence from the spanish league and the UEFA champions league. Contemporary Economic Policy, 30(3), 329–343. https://doi.org/10.1111/j.1465-7287.2011.00295.x

11.

Caudill

S. B.

Mixon Jr

F. G.

Wallace

(2014). Life on the red carpet: Star players and referee bias in the national basketball association. International Journal of the Economics of Business, 21(2), 245–253. https://doi.org/10.1080/13571516.2014.903110

12.

Constantinou

A. C.

Fenton

N. E.

Pollock

L. J. H.

(2014). Bayesian Networks for unbiased assessment of referee bias in association football. Psychology of Sport and Exercise, 15(5), 538–547. https://doi.org/10.1016/j.psychsport.2014.05.009

13.

Cueva

(2020). Animal spirits in the beautiful game: Testing social pressure in professional football during the COVID-19 lockdown (Working Paper). University of Alicante. https://web.ua.es/va/actualidad-universitaria/documentos/2020/octubre2020/football-covid.pdf

14.

Dawson

Dobson

(2010). The influence of social pressure and nationality on individual decisions: Evidence from the behaviour of referees. Journal of Economic Psychology, 31(2), 181–191. https://doi.org/10.1016/j.joep.2009.06.001

15.

Dawson

Dobson

Goddard

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 (Statistics in Society), 170(1), 231–250. https://doi.org/10.1111/j.1467-985X.2006.00451.x

16.

Deutscher

(2015). No referee bias in the NBA: New evidence with leagues’ assessment data. Journal of Sports Analytics, 1(2), 91–96. https://doi.org/10.3233/JSA-150012

17.

Dohmen

T. J.

(2008). The influence of social forces: Evidence from the behavior of football referees. Economic Inquiry, 46(3), 411–424. https://doi.org/10.1111/j.1465-7295.2007.00112.x

18.

Dohmen

Sauermann

(2016). Referee bias. Journal of Economic Surveys, 30(4), 679–695. https://doi.org/10.1111/joes.12106

19.

Endrich

Gesche

(2020). Home-bias in referee decisions: Evidence from “ghost matches” during the Covid19-pandemic. Economics Letters, 197, 109621. https://doi.org/10.1016/j.econlet.2020.109621

20.

Ferraresi

Gucciardi

(2021). Who chokes on a penalty kick? Social environment and individual performance during COVID-19 times. Economics Letters, 203, 109868. https://doi.org/10.1016/j.econlet.2021.109868

21.

Fischer

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, 22(8), 982–1008. https://doi.org/10.1177/15270025211026552

22.

Garicano

Palacios-Huerta

Prendergast

(2005). Favoritism under social pressure. Review of Economics and Statistics, 87(2), 208–216. https://doi.org/10.1162/0034653053970267

23.

Goumas

(2014). Home advantage and referee bias in european football. European Journal of Sport Science, 14(sup1), 243–249. https://doi.org/10.1080/17461391.2012.686062

24.

Higgs

Stavness

(2021). Bayesian analysis of home advantage in North American professional sports before and during COVID-19. Scientific Reports, 11(1), 1–11. https://doi.org/10.1038/s41598-021-93533-w

25.

Johnston

(2008). On referee bias, crowd size, and home advantage in the English soccer premiership. Journal of Sports Sciences, 26(6), 563–568. https://doi.org/10.1080/02640410701736780

26.

Leota, J., Hoffman, D., Mascaro, L., Czeisler, M. É., Nash, K., Drummond, S., Anderson, C., Rajaratnam, S. MW., & Facer-Childs, E. (2021). Home is where the hustle is: The influence of crowds on effort and home advantage in the National Basketball Association (Working Paper No. 3898283). Social Science Research Network. http://dx.doi.org/10.2139/ssrn.3898283

27.

National Basketball Association (n.d.a). NBA Last Two Minute reports – frequently asked questions. NBA Official. https://official.nba.com/nba-last-two-minute-reports-frequently-asked-questions/.

28.

National Basketball Association (n.d.b). Triggers. NBA Official. https://official.nba.com/replay/triggers/.

29.

National Basketball Association (n.d.c). Rule No.12: Fouls and penalties. NBA Official. https://official.nba.com/rule-no-12-fouls-and-penalties/.

30.

National Basketball Association (n.d.d). Officiating opportunities. NBA Official. https://www.nbaofficials.com/.

31.

Nevill

A. M.

Balmer

N. J.

Williams

A. M.

(2002). The influence of crowd noise and experience upon refereeing decisions in football. Psychology of Sport and Exercise, 3(4), 261–272. https://doi.org/10.1016/S1469-0292(01)00033-4

32.

Page

(2010). Evidence of referees’ national favoritism in rugby (NCER Working Paper Series No. 62). National Centre for Econometric Research. https://ideas.repec.org/p/qut/auncer/2010_09.html.

33.

Pettersson-Lidbom

Priks

(2010). Behavior under social pressure: Empty Italian stadiums and referee bias. Economics Letters, 108(2), 212–214. https://doi.org/10.1016/j.econlet.2010.04.023

34.

Pollard

(2008). Home advantage in football: A current review of an unsolved puzzle. The Open Sports Sciences Journal, 1(1), 12–14. https://doi.org/10.2174/1875399X00801010012

35.

Ponzo

Scoppa

(2018). Does the home advantage depend on crowd support? Evidence from same-stadium derbies. Journal of Sports Economics, 19(4), 562–582. https://doi.org/10.1177/1527002516665794

36.

Pope

B. R.

Pope

N. G.

(2015). Own-nationality bias: Evidence from UEFA champions league football referees. Economic Inquiry, 53(2), 1292–1304. https://doi.org/10.1111/ecin.12180

37.

Price

Remer

Stone

D. F.

(2012). Subperfect game: Profitable biases of NBA referees. Journal of Economics & Management Strategy, 21(1), 271–300. https://doi.org/10.1111/j.1530-9134.2011.00325.x

38.

Price

Wolfers

(2010). Racial discrimination among NBA referees. The Quarterly Journal of Economics, 125(4), 1859–1887. https://doi.org/10.1162/qjec.2010.125.4.1859

39.

Reade

J. J.

Schreyer

Singleton

(2020). Eliminating supportive crowds reduces referee bias (Working Paper No. 3743972). Social Science Research Network. https://doi.org/10.2139/ssrn.3743972

40.

Rocha

Sanches

Souza

Carlos Domingos da Silva

(2013). Does monitoring affect corruption? Career concerns and home bias in football refereeing. Applied Economics Letters, 20(8), 728–731. https://doi.org/10.1080/13504851.2012.736938

41.

Russell

G. W.

(1983). Crowd size and density in relation to athletic aggression and performance. Social Behavior and Personality: An international journal, 11(1), 9–15. https://doi.org/10.2224/sbp.1983.11.1.9

42.

Scoppa

(2008). Are subjective evaluations biased by social factors or connections? An econometric analysis of soccer referee decisions. Empirical Economics, 35(1), 123–140. https://doi.org/10.1007/s00181-007-0146-1

43.

Scoppa

(2021). Social pressure in the stadiums: Do agents change behavior without crowd support? Journal of Economic Psychology, 82, 102344. https://doi.org/10.1016/j.joep.2020.102344

44.

Sors

Grassi

Agostini

Murgia

(2021). The sound of silence in association football: Home advantage and referee bias decrease in matches played without spectators. European Journal of Sport Science, 21(12), 1597–1605. https://doi.org/10.1080/17461391.2020.1845814

45.

Sutter

Kocher

M. G.

(2004). Favoritism of agents–the case of referees’ home bias. Journal of Economic Psychology, 25(4), 461–469. https://doi.org/10.1016/S0167-4870(03)00013-8

46.

Weston

Drust

Atkinson

Gregson

(2011). Variability of soccer referees’ match performances. International Journal of Sports Medicine, 32(3), 190–194. https://doi.org/10.1055/s-0030-1269843

47.

Wooldridge

J. M.

(2015). Introductory econometrics: A modern approach. Cengage Learning.

48.

Yewell

K. G.

Caudill

S. B.

Mixon Jr

F. G.

(2014). Referee bias and stoppage time in major league soccer: A partially adaptive approach. Econometrics, 2(1), 1–19. https://doi.org/10.3390/econometrics2010001n

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