would be useful. The burden of funding is another area that has not been thoroughly explored. For example, Belfield pointed out that a dollar of funding from one source may not have the same policy implications as a dollar of funding from another. And, he noted, ways of making cost estimating easier, such as more accurate “plug-in” numbers (estimates for particular costs that can be used to streamline cost analysis) or standardized discount rates, would encourage decision makers to take a more detailed look at costs.