Children (2) Men (2) température (1) stratification (1) espèce (1) risque (1) productivité (1) participation (1) papier (1) histoire (1) aliment (1) ethnologie (1) science économique (1) enfant (1) aménagement du temps (1) Food (1) Variation (1) History (1) Childhood and youth (1) Genetics (1) Acquisition (1) Observations (1) Gays (1) Interviews (1) Observations (1) Couples (1) Fatherhood (1) Caregivers (1) Economics--Sociological aspects (1) Single fathers (1)