The AP formula does not count changes in the present value of pension benefits.

WSJ: MasterCard CEO made $11.3M in 2012, up 35 percent

The AP formula does not count changes in the present value of pension benefits or stock option gains such as those recognized by Zuckerberg did last year.

NPR: Facebook CEO Reaped $2.3B Gain On Stock Options

Since 1997 Congress has made 1, 184 changes in the code, according to a count by tax publisher CCH.

FORBES: Magazine Article

Since 1997 Congress has made 1, 159 changes in the tax code, by tax publisher CCH's count.

FORBES: Tax Roulette

That could allow Edwards or Obama supporters to play a role in candidate selection -- if the national party changes its mind and decides to count Michigan's delegates.

CNN: Romney's Michigan win shakes up GOP race

Changes in the population distribution will have political effects too, which is one reason why the count was delayed.

ECONOMIST: Pakistan