I am the poster to which you were responding. NBER and SSRN are not publications. These are repositories for working papers. At the top of the market you get hired on the basis of the promise of your JMP and/or other working papers. Nothing that you wrote contradicts anything that I wrote.
You don't know much about economics or political science.
Candidates in economics and political science may not have official pubs but must have visible working papers and some oral presentations. In general, job market papers can be published in either the NBER or the SSRN.