In 2015, the fraction of the American population that smokes is

Real consumption is a function of real disposable income, but the simple Keynesian model uses real GDP instead of real disposable income. This is appropriate since

A) we cannot measure either exactly and the purpose of the exercise is theoretical only. B) real disposable income tends to move proportionately with real GDP. C) real disposable income is a fixed percentage of real GDP. D) real GDP is a fixed percentage of real disposable income.

If economists calculate the GDP for 2009, using current prices of year 2009, what are they estimating?

(A) Net national product (B) Real GDP (C) Nominal GDP (D) Depreciation