TABLE 5.

Main research areas in economic and social value in the sport industry.

Cluster	Size	Silhouette	Mean (year)	Label	Description
1	69	0.958	2009	CSR theoretical tramework	The concept of CSR in the sport industry is defined and its determinants, drivers, and influential factors are explored
2	54	0.947	2014	CSR case studies	Implementation and decision-making of CSR in the sport industry are analysed by means of case studies
3	45	1.000	2016	Teaching, personal, and social responsibility (TPSR)	The TPSR model is analysed
4	40	0.925	2007	Strategic CSR	Both the general strategic approach of CSR and for the football industry are established
5	37	0.988	2016	Sponsorship	The effectiveness factors of sponsorship, its function as a communication strategy, and the roles of sponsors on recipients are analysed
6	36	0.909	2012	Emotional value	Contributions to social identity theory applied in the sport industry in regard to brand identity, team identification, and attachment
7	19	0.991	2012	Educative programs	Social impact of sport-based programs is analysed
8	18	0.963	2007	Consumer ethical perception	The effect of CSR efforts according to the ethical motives perceived by customers is analysed
9	9	0.983	2008	Environmental issues	Different issues regarding environment are analysed
10	6	0.996	2009	Corporate citizenship	It deals with the specific activities that a sport organisation engages in to meet their social obligations

Silhouette: quality of a clustering configuration (Rousseeuw, 1987), suggested parameters between 0.7 and 1 (Chen et al., 2010).