In this part of the paper it is reasonable to return to the stated aim of the research. So, the study aims at evaluating the impact of diversity of teams of the international sports leagues on the team performance and then compare the obtained output. As a result, the effects of diversity which is measured through Herfindahl-Hirschman index and Number of nationalities using the database on hockey (particularly, the Continental Hockey League) and on basketball (specifically, the VTB United League) have been estimated for both samples and then the obtained inferences have been compared.

As a consequence, the Hypothesis 1 has been confirmed: cultural team diversity does matter in the team performance in both considered sports. Looking at the results in more detail, diversity positively affects team performance in both sports. In general, the obtained results for hockey are consistent with the results of Kahane et. al (2013); however, the inferences for the basketball sample contradict the results of Timmerman (2000).

The Hypothesis 2 is also confirmed: the effects for hockey and for basketball are different. The finding can be interpreted as follows: the effects differ because of the dissimilar degree of interaction between players during the game due to the specifics of the sport. Besides, in the KHL the wage ceiling is set; while in the VTB United League the players' earnings are not limited, according to the Leagues's policy. In addition, due to the specifics of the sports the incurred costs and received benefits can be different. So, as it has been suggested by Lazear (1999), the integration and transaction costs incurred due to the diversity increase might outweight the benefits of diversity; however, this statement is not confirmed in the current paper due to the imposed legionnaires' quotas that regulate the number of foreigners.

The difference in the effects of diversity in sports under consideration can be also explained with the different size of the legionnaires' quotas (the limit is stricter for hockey). When the Leagues' Management put restrictions on the permitted number of legionnaires, the clubs tend to hire high-quality foreign players who demonstrate the highest level of utility; that's why foreign sportsmen amplify the whole team results. Beside increasing team performance through the individual efficiency, the legionnaires are supposed to introduce innovative game strategies and show advanced style of playing.

The main finding of the current paper is that we have proved that cultural team diversity is an essential factor of boosting team performance. As team sport can be regarded as an international business, the obtained inferences might be transferred to the real business sector. So, the entity which aims at enhancing its financial performance should engage high-skilled foreign employees. However, the entity's management should sensibly hire the foreigners since the incurred costs might surpass potential benefits of diversity as it is stated by Lazear (1999).

Moving to the prospects for the further research, it would be extremely valuable for the firm interest to put forward the performance maximization staffing formula which focuses on the native/foreign staff share. Probably, it is possible if employ the data on sport without legionnaires' quotas.

Current research includes some limitations. Firstly, the club budgets in the KHL are not disclosed that's why the missing data has been filled according to our own assumptions; it might be the reason for the statistical insignificance of the team budget control variable in the model for hockey. Secondly, another diversity metrics of diversity (for example, the gini coefficient) can be employed which would influence the inferences; similarly, performance might be measured from another angle therefore the outcome could differ from the obtained results.

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