test (1) produit (1) modèle (1) marketing (1) marché (1) firme (1) différenciation (1) économie des affaires (1) ligne (1) comptabilité (1) Differentiation (1) Marketing (1) Accounting (1) Specimens (1) Forms (1) Imperfection (1) Employees (1) Strategy (1) Sales (1) Pricing (1) Price discrimination (1) Microeconomics (1) Markets (1) Marketing (1) Manufactures (1) Managerial economics (1) Industrial organization (Economic theory) (1) Industrial organization (1) Industrial management (1) Hypothesis (1)