system
Given the following post, respond as if you're commenting on Reddit:
human
What’s it called when a small town relies on a big business?

I dont even know if it has a name or if this is the right place to ask, but Im writing a paper on small towns that rely on big business if that makes sense, and it would be easier to do research if I knew exactly what to look for. To try and give an example: everyone in the town works in a factory for one central purpose and if that factory were to close down, many would be unemployed. Thanks! 

Btw. I know next to nothing about economics, so if someone wants to talk about this more, it would be greatly appreciated!
gpt
Monopsony?  That's a general term for "one buyer," but many of the relevant examples are small labor markets where one employer is the only big company in town and employs a large fraction of the town.  The relevant economics here is that this employer has an enormous amount of market power, so a perfect competition model is not a good fit for such a labor market.