Entrepreneurship is a field of research that is related to many others, e.g., behavioral sciences, economics, finance, innovation, and marketing – to mention just a few – and needs permanent interchange with practice. For the necessary interdisciplinary exchange of information, ideas, and results the Symposia on the Entrepreneurship – Innovation – Marketing Interface provide an excellent opportunity. After two conferences at the University of Karlsruhe, the 3rd Symposium took place at the University of Cottbus in 2009 together with the 2nd BIEM-Symposium on Entrepreneurship and Innovation. This volume contains a selection of revised articles from this conference grouped in the following chapters: Technology Transfer, Spin-Offs, and Knowledge Management, International Entrepreneurship and Regional Development, Open Innovation, New Product Development, and Commercialization, Opportunity Recognition and Evaluation, and Gender-Specific Aspects of High-Tech Start Ups.