Q: Do most/all job postings have a location associated with them?

A:  On average, more than 80% of job postings picked up have cities associated to them.

      There are, of course, some that are nation-wide and some that have locally known names like "Market Square" and "East End" and cannot be matched to any city.  Those postings with no cities, but contain a State, will be associated to their state..