RT Article T1 Why and How Does Social Responsibility Differ Among SMEs? A Social Capital Systemic Approach JF Journal of business ethics VO 138 IS 2 SP 365 OP 384 A1 Aragón, Cristina A1 Narvaiza, Lorea A1 Altuna, Maite LA English PB Springer Science + Business Media B. V YR 2016 UL https://ixtheo.de/Record/1785659030 AB The existing analysis of heterogeneous social responsibility (SR) in small and medium enterprises (SMEs) has considered the effects of individual factors. However, no holistic analysis has been performed on how different factors of heterogeneity interact and how they collectively affect SR in SMEs. Here, we propose a new systemic approach—employing the social capital concept—with the aim of identifying how and why SR is built diversely in SMEs. In particular, we focus on a positive and holistic perspective that integrates the factors proposed in the literature into the social capital construct. Through a case study of four Spanish SMEs, this article proposes a systemic approach to the study of heterogeneous SR in SMEs. K1 Case study K1 Behaviour K1 Heterogeneity factors K1 Social Capital K1 small and medium enterprises K1 Social Responsibility DO 10.1007/s10551-015-2632-2