Innovating across boundaries: A portfolio perspective on innovation partnerships of multinational corporations

This paper examines how and under what conditions alliance portfolio diversity influences a firm's innovative performance, with special attention being given to potential performance differences between multinational corporations (MNCs) and domestic firms. Analyses of data from 1045 German firms, among which 598 MNCs, revealed an inverted U-shaped relationship between alliance portfolio diversity and MNCs’ innovative performance. Findings also indicate MNCs to be better positioned than their domestic counterparts with regards to translating alliance portfolio diversity into superior innovative performance. Importantly though, this only holds for MNCs equipped with strong internal R&D capabilities and, to some extent, high human capital.