What is the difference between NAICS and the 1980 Canadian SIC?
The NAICS hierarchy and coding system differs from the Canadian 1980 SIC in certain important respects. The first four levels of NAICS are designed for the production of comparable economic statistics by the three countries. At the fifth level, each country elaborates the national detail it requires for statistical purposes. Thus in contrast to the 1980 SIC, the grouping of industries in the hierarchy of NAICS and their delineation at the fifth level are no indication of their statistical importance in the Canadian economy.
