papier (2) industrie (2) commerce extérieur (2) différenciation (2) Differentiation (2) Commerce (2) Intra-industry trade (2) States (2) International trade (2) Paper (2) Industries (2) Commerce (2) Business (2) States (2) effet (1) libre échange (1) Area (1) Product differentiation (1) Area (1) Quality of products (1) Manufactures (1) Free trade (1) Determinants (1) Size (1)