Purchasing Power Put To The Test: It's Nanonomics

WHEN you chomp on a Big Mac, sip a Starbucks coffee or listen to your iPod, you're also holding in your hands a way to tell whether the Australian dollar should be going up or down. The emergence of global brands like these have not only homogenised people's consumption habits the world over but allowed clever-clogs economists to bring to the masses the joys of exchange rate theory.