Konrad, Kai A Altruism and envy in contests: an evolutionarily stable symbiosis - Wissenschaftszentrum, Berlin 2002 - 18 See WZ 330 KON (Includes Acc Nos 31931, 31932, 31933, 31934, & 31935) ISBN: FS IV 02 - 19 Subjects--Topical Terms: ECONOMICS