plomb (1) externalité économique (1) effet (1) économie (1) produit intérieur brut (1) Mexique (1) Dynamics (1) Mexican states (1) Gross domestic product (1) States (1) Rates (1) Southern States (1) Lead (1) Growth (1) Example (1) Econometrics (1) Dynamics (1) Neighbors (1) Regions (1) States (1) Rates (1) Growth (1)