In strategic management and organizational theory, organizational effectiveness denotes the broadest domain of business performance. 'What is the optimal structural configuration for organizational ambidexterity and to what extent is it contingent upon firm type?' To answer this research question, this study employs a two-step approach. In the first step, Sebastian Kortmann determines a structural configuration that generally supports organizational ambidexterity. Then, in a second step, he draws upon structural contingency theory and investigates to what extent this optimal structural configuration is dependent on firm type. ?