1. In the productive sector, firm-level studies are sparse, but those that we have indicate that the accumulation of technological capacity through learning is very limited.

2. This is typical of the northeast distribution, which is characterized by an absolute predominance of demand from the productive sector ( # per cent) and a relative scarcity of demand expressed by families

3. This is typical of the northeast distribution, which is characterized by an absolute predominance of demand from the productive sector (88 per cent) and a relative scarcity of demand expressed by families.