We explore heterogeneities in the determinants of innovating firms’ decisions to engage in R&D cooperation, differentiating between three types of cooperation partners: suppliers and customers (vertical cooperation), competitors (horizontal cooperation), and universities and research...

This Paper develops a framework for testing discrete complementarities in innovation policy using European data on obstacles to innovation. We propose a discrete test of supermodularity in innovation policy leading to a number of inequality constraints. We apply our test to two types of...