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, Les variables du modèle Principales variables : Les variables utilisées dans les estimations économétriques sont les suivantes : Variables à expliquer : Moyens d'appropriation de l'innovation. PAVal : brevet valide fin 2000 : variable dichotomique 0/1 Non/Oui Proreg : enregistrement du design : variable dichotomique 0/1 Non/Oui Protm : utilisation de la marque : variable dichotomique 0/1 Non/Oui Procp : copyright : variable dichotomique 0/1 Non/Oui Prosec : secret : variable dichotomique 0/1 Non/Oui Prodes, vol.1