The charity wants to use this large-scale study to create a benchmark for a "well-being index" - so that the impact of future changes in policy can be measured.

BBC: Family argument

As I wrote in a post earlier this year, the problem with putting Apple in the Dow is that the index is price-weighted: stocks with larger absolute prices have a bigger impact than smaller ones.

FORBES: UnitedHealth (And Not Apple) Replaces Kraft In The DJIA