This book is about the analysis of household survey data from developing countries and about how such data can be used to cast light on a range of policy issues. Much of the analysis works with household budget data, collected from income and expenditure surveys. Data from several different economies are used to illustrate the analysis, drawing examples of policy issues from economies as diverse as Cote d'Ivoire, India, Pakistan, South Africa, Taiwan, and Thailand. One of the aims of the book is to bring together the relevant statistical and econometric methods that are useful for building the bridge between data and policy. Chapter 1 describes those features of survey design that need to be understood in order to undertake appropriate analysis. Chapter 2 discusses the general econometric and statistical issues that arise when using survey data for estimation and inference. Chapter 3 discusses the use of survey data to measure welfare, poverty, and distribution. Chapter 4 discusses the use of household budget data to explore patterns of household demand. Chapter 5 is about price reform, its effects on equity and efficiency, and how to measure them. Chapter 6 is concerned with the role of household consumption and saving in economic development. The book also includes a code appendix, which gives code and programs using the STATA code, and serves as a template for the users own analysis.