Moreover, the number of workers and payments could be aggregated by sector and subsector.

FORBES: Magazine Article

We use historical correlation measurements to help define what qualifies as an asset class and what is simply a sector or subsector.

FORBES: Asset Allocation and the Efficient Frontier

Mr. Obama and his advisers need to grasp this essential fact: Entrepreneurs are not just a cute little subsector of the American economy.

WSJ: Rich Karlgaard: Apple to the Rescue?

And then we take a look at the best of those kind of companies, relative to the overall market, relative to the sector that they reside in, and relative to the subsector that they reside in, and try to pick the best businesses and then look at those companies that score well, and then try to see how they have done, relative to the overall market.

FORBES: Sector Favorites from a Large-Cap Manager