I didn't mean geographic concentration of the resource (although that can be a factor) - geographic concentration of firms can often have a knock-on effect on b

I didn't mean geographic concentration of the resource (although that can be a factor) - geographic concentration of firms can often have a knock-on effect on both infrastructure and other supporting resources (a dock that can support exporting neon, neon-extraction-machine repair & service companies nearby, concentrated local expertise, etc).