The paper estimates that each new profile added to the US DNA database - the Combined DNA Index System, or Codis - resulted in 0.57 fewer serious offences.

BBC: DNA and individual freedom v crime prevention

By assigning an equal weight to each component of the index it may be that one may develop a well balanced risk reward profile.

FORBES: Innovation In Investment Vehicles

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

ECONOMIST: Free exchange