“…Cost Effective Analysis (CEA) assesses the effectiveness (E) of a particular program or intervention relative to the cost (C) of implementation.By combining information on effectiveness and costs, it is possible to determine which program provides a given level of effectiveness at the lowest/highest cost (Levin & McEwan, 2001). In other words, E represents the impact evaluation in which effects are expressed as an average treatment in a sample of individuals.The costs of an intervention, C, reflects the costs of additional resources used in the intervention, which include any resource with their appropriate estimate of the "opportunity cost".In other words, "using resources in one way, we are giving up the ability to use them in another way, so a cost has been incurred" (Levin & McEwan, 2001).…”