Assessing the reliability of household expenditure data: results of the World Health Survey.

The World Health Survey (WHS) which has been implemented in more than 70 countries with standardized questionnaires opens a great opportunity for research on health care financing issues. This study examines the household expenditures and health expenditure collected in the WHS in terms of reliability, consistency between different ways of data collection within the survey and with other types of household surveys. Data used in this study include 50 WHS and 37 other type of surveys, namely the Living Standard Measurement Survey, Household Budget Survey and Income and Expenditure Survey.