He co-authors their Iraq Index, and I asked him how many American servicewomen in Iraq are actually in harm's way.

NPR: A Look at Servicewomen in Harm's Way in Iraq

The authors compute an index of occupational segregation, which compares the composition of employment in individual places with the national profile.

ECONOMIST: Free exchange

The authors did acknowledge that alternative index products do represent a potentially efficient way for investors to buy the risk factors.

FORBES: No Free Lunch from Alternative Indexes

As for the authors, they advise buying index funds and simply attempting to capture a market return at the lowest possible trading cost.

FORBES: Are Some Money Managers Great, or Just Lucky?