Colombie (1) Contingent valuation (1) Ecotourism (1) Water quality (1) Water (1) Valuation (1) Sieges (1) Quality of products (1) Profit (1) Pressure (1) Health resorts (1) Consumption (Economics) (1) Ability (1) Willingness to pay (1) Agua--Calidad (1) Valoración contingente (1) Demanda (1) Ecoturismo (1) Valoración (1) Presión (1) Calidad (1) Beneficios (1) Balnearios (1) Agua (1) Disposición a pagar (1) Aptitudes (1) Sitios (1) Consumo (1)