The One-Way ANOVA tests indicated that paid participants had a significantly higher perception of expertise for their code review partners than the volunteers participants did (F1 = 4.58, p =.033). One possible reason for this result could be that paid participants may spend more hours in code review because OSS participation is part of their regular jobs. The results of a Chi-Square analysis showed that, in fact, paid participants do spend significantly more time in code review than volunteer participants do (χ2 = 26 .07,df =3,p