Among the factors of court performance—a crucial element of the institutional environment for a well-functioning market economy—productivity (disposition time) and adjudicatory quality (minimum legal errors) are significant. This paper investigates presumed quantity-quality tradeoff in Russian commercial courts when considering claims to annul administrative infringement decisions, on the example of antitrust cases. Using a dataset of the first instance court decisions regarding claims to annul decisions of Russian competition authority during 2008–2015, we explore the influence of extra efforts by a judge to assess the evidence on the probability of appealing and annulling her decision. The effect is not found to be statistically significant which means the absence of adjudicatory quantity-quality tradeoff. We discuss then the implications of the finding to the rules for additional evidence presented in the courts when considering a case. We conclude, first, that in Russia the rules on reasonable disposition time and the motivation of judges to prevent backlog do not increase the probability of legal errors. Second, new evidence acquired during judicial review does not statistically improve the legal quality of court decisions. The policy implication is that the recent initiative of the Supreme Court of the Russian Federation to limit additional evidence when considering claims to annul administrative antitrust decisions is reasonable.

在法院绩效的因素中——对于一个运转良好的市场经济来说，制度环境的一个关键因素——生产力（处置时间）和审判质量（最小的法律错误）是很重要的。本文以反垄断案件为例，调查俄罗斯商业法院在考虑撤销行政侵权决定的索赔时假定的数量质量权衡。使用 2008 年至 2015 年期间关于撤销俄罗斯竞争主管机构决定的一审法院判决的数据集，我们探讨了法官额外努力评估证据对上诉和撤销其决定的可能性的影响。没有发现这种影响在统计上显着，这意味着没有裁判性的数量质量权衡。然后，我们将讨论该发现对法院在审理案件时提供的额外证据规则的影响。我们得出结论，首先，在俄罗斯，关于合理处置时间的规则和法官防止积压的动机不会增加法律错误的可能性。其次，在司法审查过程中获得的新证据并没有从统计学上提高法院判决的法律质量。政策含义是，俄罗斯联邦最高法院最近在考虑撤销行政反垄断决定的索赔时限制额外证据的倡议是合理的。在俄罗斯，关于合理处置时间的规则和法官防止积压的动机不会增加法律错误的可能性。其次，在司法审查过程中获得的新证据并没有从统计学上提高法院判决的法律质量。政策含义是，俄罗斯联邦最高法院最近在考虑撤销行政反垄断决定的索赔时限制额外证据的倡议是合理的。在俄罗斯，关于合理处置时间的规则和法官防止积压的动机不会增加法律错误的可能性。其次，在司法审查过程中获得的新证据并没有从统计学上提高法院判决的法律质量。政策含义是，俄罗斯联邦最高法院最近在考虑撤销行政反垄断决定的索赔时限制额外证据的倡议是合理的。