Dennis Dittrich Max Planck Institute for Research into Economic Systems, Strategic Interaction Group   ,   dittrich@mpiew-jena.mpg.de   http://www.mpiew-jena.mpg.de/esi/dittrich/index.html       Primary Research Focus: experimental and behavioral economics, principal agents relations   JEL Areas: C0 : Mathematical and Quantitative Methods: General J0 : Labor and Demographic Economics: General