ETH Library Activity spaces, biographies, social networks and their welfare gains and externalities Some hypotheses and empirical results Working Paper Author(s): Axhausen, Kay W. Publication date: 2005-06 Permanent link: https://doi.org/10.3929/ethz-b-000123201 Rights / license: In Copyright - Non-Commercial Use Permitted Originally published in: Arbeitsberichte Verkehrs- und Raumplanung 290 This page was generated automatically upon download from the ETH Zurich Research Collection . For more information, please consult the Terms of use .