Increasingly, evaluations of programs and research on innovations require collection of information on costs, cost-effectiveness, and often more. Most evaluators are not prepared to do this.We give advice and guidance on how to meet these needs.The first presentation explains what types of costs can be included in evaluations, and what cost, cost- effectiveness, cost-benefit, and cost-utility means when one or more of these are among the aims of an evaluation. A second presentation describes how costs... The third presentation describes how to evaluate the economic feasibility of a program before it is funded and initiated. These are prospective cost, cost- effectiveness, cost-benefit, and cost-utility analyses. A fourth presentation explores adjustments that evaluators and economists need to make when collaborating on evaluations that include costs