At every Board meeting of CPRsouth we provide evidence on the efficacy of our actions. Every time we seek funds for our work, we do the same. So we thought the question would be of equal interest to our colleagues engaged in similar enterprises, at TPRC and EuroCPR. We prepared two papers building on one another, one for each. The TPRC paper was presented last September, the Samarajiva_EuroCPR_Mar13_final a few days back.