We propose a novel selectivity correction procedure to deal with survey attrition, at the crossroads of the "Heckit … models, we use information on the number of attempts that were made to obtain response to the survey from each individual who … and unbalanced response rates. -- survey non response ; sample selectivity ; treatment effect model ; randomized …

two independent surveys on the same initial sample of 8,000 persons. The first one is a long telephone survey that had a … telephone survey targeted at those leaving the unemployment registers; this enriched data source has a balanced and much higher … results. Using the enriched administrative data as benchmark, we find evidence that estimates from the long telephone survey …