Cross-National Equivalent File, 1970-2009contains population panel data from Australia, Canada, Germany, Great Britain, Korea, Switzerland and the United States. Each of these countries undertakes a longitudinal household economic survey. The data are made equivalent, providing a reference dataset which cross-links each of the individual studies and allowing cross-national comparisons. The CNEF is managed by the Department of Policy Analysis and Management at Cornell University. Data Services must be contacted to use the data.