alt Hacker NewsI don't know, this just seems like a sectoral analysis among o&g? We have pretty strong evidence that density leads to higher productivity, I'd be keen to see it replicated more broadly (one such study of many: https://www.newyorkfed.org/medialibrary/media/research/staff...).
It uses Oil & Gas shocks, rather than a sectoral analysis among o&g. I think it is because big firms are in big cities, who seem to be able to handle shocks better than other companies in other cities