The propensity score matching estimates are carried out by
employing a number of matching algorithm like nearest neighbor
matching (NNM), kernel based matching (KBM), radius matching
(RM) and mahalanobis metric matching (MMM). To check the robustness
of the results, this is always better to employ more than one
matching algorithm. The results for the NNM are presented first as it
matches the best participant with the similar non-participant in the