Agricultural Economics [EE110]; Animal Husbandry and Production [LL180]; Meat Produce [QQ030]; Supply, Demand and Prices [EE130]; Input Utilization (Microeconomics) [EE145]; Labour and Employment [EE900]; Social Psychology and Social Anthropology [UU485]; efficiency; economic analysis; economic impact; agricultural production; supply balance; employment; chicken meat; poultry; motivation; farm inputs; fowls; birds; Iran; high Human Development Index countries; lower-middle income countries; Middle East; West Asia; Asia; Gallus gallus; Gallus; Phasianidae; Galliformes; vertebrates; Chordata; animals; eukaryotes; supply and demand; jobs; domesticated birds; chickens