Purpose – This study aims to investigate the relationship between organizational systems, market orientation, family culture and the long-term business performance of family businesses in the wine sector in three countries. Design/methodology/approach – A survey by questionnaire was undertaken with 123 wineries in Australia, Germany and Italy. Multiple-item measurement scales and multiple regression models were used to investigate mediation effects. Findings – The findings indicate a marked influence of organizational systems and family culture on financial performance. Market orientation fully mediates the effect of family culture and partially mediates the effect of organizational systems on financial performance. Practical implications –...