<DIV>Economists wish to compare prices, real income, and output across countries and regions for many purposes. In the past, such comparisons were made in nominal terms, or by using exchange rates across countries, ignoring differences in price levels and thus distorting the results. Great progress...</div>

Economists wish to compare prices, real income, and output across countries and regions for many purposes. In the past, such comparisons were made in nominal terms, or by using exchange rates across countries, ignoring differences in price levels and thus distorting the results. Great progress...

Economists wish to compare prices, real income, and output across countries and regions for many purposes. In the past, such comparisons were made in nominal terms, or by using exchange rates across countries, ignoring differences in price levels and thus distorting the results. Great progress...