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Would be nice to get a specific intervention project and then talk through how to do cost analysis in light of what is described in the intervention proposal.
Good ask, Zhihui! We are working toward the goal of having one or more examples of proposals that include a cost analysis. Since this is a new requirement, we trying to build up such resources for PIs. I appreciate you stating the need for this.
Bureau of Labor Statistics: https://www.bls.gov/