The simplest way to calculate purchasing power parity between two countries is to compare the price of a "standard" good that is in fact identical across countries. Every year The Economist magazine publishes a light-hearted version of PPP: its "Hamburger Index" that compares the price of a McDonald's hamburger around the world. More sophisticated versions of PPP look at a large number of goods and services. One of the key problems is that people in different countries consumer very different sets of goods and services, making it difficult to compare the purchasing power between countries. [10176]
