Corporate tax should be fair and shared

Corporate tax should be fair and shared - FT.com:

A better solution to international tax evasion:

Instead of attempting to estimate what fraction of a company’s total profit was earned in California and what amount in Wyoming, apportionment states taxed corporations on a share of their aggregate US profits corresponding to the share of their total US activity that took place in the state. The most common basis of apportionment is the “Massachusetts formula”, which gives equal weight to sales, payroll and assets.