puits (1) société (humaine) (1) simulation (1) spectacle (1) science (1) modèle (1) coût (1) Forms (1) Common good (1) Social systems (1) Science (1) Proportion (1) Partition (1) Gifts (1) Finance (1) Example (1) Cycles (1) Cost (1) Cooperation (1) Consumers (1) Communities (1) Bears (1) Associations, institutions, etc (1) Finance (1) Size (1) Science (1)