This book extends research in consumption economics by identifying similarities and differences in consumption patterns in a large number of countries, both developed and less developed. Its approach is to carefully analyze a large body of data from a highly diverse group of countries to determine the extent to which a simple economic framework can be used to understand and explain consumer behavior. It uses data from more than 40 countries which range from the most affluent to the poorest in the world. The book pays particular attention to the consumption of food and to new simulation techniques applied to systems of demand equations.