I have a constituent in a small town here in Colorado who is working on a submission for some grants for a proposed large public art installation and revitalization of a public park. They were wondering if there was sort sort of tool or resource guide that could help them demonstrate the measurable impact of a cultural amenity/public artwork. I can't think of anything off the top of my head, so figured I'd outsource the question to you all. Any resources or tool kits about the economic impact of art in public spaces would be most appreciated.