Abstract
This chapter extends the knowledge of international opportunity by explaining the role of effectual and causal decision-making in internationalization of small and medium-sized enterprises. This research aims to explain and compare the effects of effectual and causal paths of international opportunity development in terms of firms' competitive advantage. This study contributes to the international entrepreneurship literature by shedding light on the association between the logic of decision-making and firms' competitive advantage as a key construct in IE research.