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Appendix B
The Dynamics of Treatment
Table B1 reports the share of treated and controls in the respective experiment who had
received treatment at different occasions. In the Sassam experiment, a large difference
between S-treated and S-controls appears immediately after the screening. The
treatment difference diminishes with duration but is still substantial in February 2009, 45
percent (0.45-0.31). Compared to the Sassam experiment, the share of treated in the AM
experiment is smaller in the first few months after the screening. This is expected since
AM followed participation in Sassam. Also, since individuals continuously return to work,
the share of treated was smaller compared to the Sassam experiment. The treatment
difference was also smaller; in February 2009 the effect on treatment of being prioritized
was 15 percent (0.30-0.26).
