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We look into the question whether heterogeneity stemming from research orientation, gender, or disciplinary and cultural differences with their PhD supervisors helps or hampers academics' careers. Based on a sample of 248 academics at two leading European universities of technology, we combine multinomial logit models and sequential logit models to understand career advancement. Our results show that heterogeneity stemming from research orientation is helpful. Academics who bridge between the quest for fundamental understanding and socio-economic relevance attain career success. Yet heterogeneity stemming from gender hinders careers: female academics face problems securing tenured positions and full professorships. Mentor-mentee heterogeneity only helps in early career transitions, but hampers advancement later on. Our insights offer suggestions to policymakers, university managers, and academics, because they help to identify promising academics, the right support for sitting staff members, measures correcting for gender imbalances, and can inform strategic choices regarding research orientation and PhD supervisors.

Collaborations are particularly important for the development and deployment of technology. We analyse the influence of organizational, technological and geographical proximity on European nanotechnology collaborations with the help of a publication dataset and additional geographical information. While organizational proximity influences the output of collaborations only indirectly, geographical and technological proximity do so directly. Geographical proximity is most significant in statistical terms and technological proximity has the highest magnitude of effect. Consequently, the latter lends itself most for management and policy interventions, for example, by providing information on technological specialization of potential partners. Resumen Las colaboraciones son especialmente importantes para el desarrollo y el despliegue tecnológico. Se analiza la influencia de la proximidad organizacional, tecnológica y geográfica en colaboraciones europeas en nanotecnología, con la ayuda de un conjunto de datos publicados e información geográfica adicional. Si bien la proximidad organizacional influye en el resultado de las colaboraciones solo de manera indirecta, las proximidades geográfica y tecnológica influyen directamente. La proximidad geográfica es la más significativa en términos estadísticos y la proximidad tecnológica tiene la magnitud del efecto más elevada. Consecuentemente, esta última se presta más a las intervenciones de gestión y de políticas, por ejemplo, facilitando información sobre la especialización tecnológica de socios potenciales. [ABSTRACT FROM AUTHOR]