The only metric of the value of an object, act or condition. It's hard to promote something like parks (my example), even though people want them, love them and use them heavily because we have a hard time placing dollar values on the things that parks offer their users. It's why news reports like to include cost of damages from storms or crime even though the greatest loss is often non-material. It's how capitalist societies appear to work. I took if for granted people would know what I meant because I use the dollar filter too.