Unintended Consequences: Some Problems with National Income Accounting
It is trivial to say that any cardinal number can be added to another to answer the question of “how many” or “how much” of something there is. The trick lies in teasing some relevance out of the resultant sum. The relevant tradeoff in constructing any aggregate is between the advantage of reduced complexity of a unique figure summarizing data and the disadvantage of the information lost from any individual figure within the set.