Nemes, KingaLisboa, InêsKonczos-Szombathelyi, Márta2025-12-052025-12-052025-03Nemes, Kinga & Lisboa, Inês & Márta, Konczosné. (2025). Model testing – decision-making on capacity expansion in family businesses. Evidence from Portugal. Journal of International Studies. 18. 22-40. 10.14254/2071-8330.2025/18-1/2.2306-34832071-8330http://hdl.handle.net/10400.8/14904The authors also express their gratitude to the Internal Publication Support Services of Széchenyi István University for their assistance.This paper aims to test and validate a model of internal factors influencing the capacity expansion decisions of family businesses, thereby helping these organizations better understand their decision-making processes. The identified internal factors include socio-emotional wealth, intergenerational cooperation, and a heterogeneous top management team. The study focuses on family businesses in the Portuguese food industry and employs both qualitative and quantitative methods. A structured online questionnaire, completed by 150 respondents, was analyzed using SPSS. Additionally, in-depth interviews were conducted to confirm the quantitative findings and provide a broader conceptual perspective. The results indicate that both qualitative and quantitative analyses support the proposed model.engfamily businessesdecision-makingcapacity expansionPortugaljournal article10.14254/2071-8330.2025/18-1/2