Julián Cárdenas holds a PhD in Sociology from the Universidad de Barcelona (Spain). His research lies mainly on business elites and the effect of elite networks on issues such as inequality, innovation and sustainable development. Julián Cárdenas has taught network analysis, networking, economic sociology, statistics and research methods, among other subjects. He is currently researcher at the Freie Universität Berlin. Previously, Julián Cárdenas was assistant professor at the Universidad de Antioquia (Colombia), lecturer at the Universidad de Barcelona and postdoctoral researcher at the IESE Business School (Spain). His homepage: www.networksprovidehappiness.com and blog: www.networkianos.com