books.google.co.uk - Over the past 15 years, the availability of cheap and convenient microcomputers has changed the collection methods and analysis of household survey data in developing countries, making the data available within months, rather than years. Simultaneously, analysts have become more interested in exploring...http://books.google.co.uk/books/about/The_analysis_of_household_surveys.html?id=Mfe8ukMh_v4C&q=unit+values&utm_source=gb-gplus-shareThe analysis of household surveys
