RT Article T1 How Well Have Social Economy Financial Institutions Performed During the Crisis Period? Exploring Financial and Social Efficiency in Spanish Credit Unions JF Journal of business ethics VO 151 IS 2 SP 319 OP 336 A1 Martínez-Campillo, Almudena A1 Fernández-Santos, Yolanda A1 del Pilar Sierra-Fernández, María LA English PB Springer Science + Business Media B. V YR 2018 UL https://www.ixtheo.de/Record/1785665545 AB As Social Economy financial institutions, credit unions have traditionally been considered less efficient than traditional banking entities. However, like banks and savings banks, they have to be as efficient and competitive as possible to survive in today’s business environment, especially at times of crisis. To date, there have been very few studies on their efficiency and practically none for the crisis period. Moreover, almost all the existing studies assess only financial efficiency, without considering their social function. This study examines the levels of both financial and social efficiency in Spanish credit unions as well as their main determinants during the recent crisis. We apply the two-stage double bootstrap data envelopment analysis (DEA) methodology based on panel data corresponding to all the credit unions active in Spain between 2008 and 2013. The empirical results indicate that financial and social efficiency achieved an acceptable level, although on average the former was slightly greater than the latter. We also find that both age and merger and acquisition activity were positively influential on the financial efficiency of credit unions but had a significant negative effect on their social efficiency. Moreover, the regional location of such entities and the financial crisis were also crucial determinants of both types of efficiency. Our findings are therefore useful for all the stakeholders of credit unions to know if these entities have been efficient according to a double bottom line accounting in the crisis period and hence to maintain successful social management that is compatible with satisfactory financial efficiency. K1 Social efficiency K1 Social Economy financial institutions K1 Financial efficiency K1 Crisis period K1 Credit unions DO 10.1007/s10551-016-3192-9