Growth is spread unequally in the Mauricie - Bois-Francs region. In the agricultural zone, the commercial and undetermined activities are, among the retained variables, the only ones to account if only slightly for the shrinkage of the agricultural area. At the towns and villages level, even if the manufacturing activities have undergone a real regression, mainly on the left bank of the St. Lawrence River, the commercial and service activities have developed unevenly and more significantly in the largest and best located towns and villages. The internal pattern of the area partially explains the unequal distribution of tertiary activity growth, whereas it accounts for nearly nothing in the manufacturing sector in the explanation of the latter's regression.