Dynamics (1) Control (1) Assaying (1) Agriculture (1) Price-earnings ratio (1) Gross domestic product (1) Unemployment (1) Sociology, Rural (1) Progress (1) Poverty (1) Poor (1) Pension trusts (1) Head (1) Fruit (1) Food relief (1) Flight (1) Equilibrium (1) Cities and towns (1) Agricultural ecology (1) Ability (1) Classification (1) Classification (1) Analysis (1) Rural conditions (1) Population (1) Labor productivity (1) Growth (1) Performance (1) Animales--Crecimiento (1) Trabajo--Productividad (1)