Employment isn't a transaction, it is a relationship. If one is not being paid enough nothing prevents revisiting the discussion.
Having said that, I don't see a lot of advice on the topic online. Obviously after spending some time at a company you have a better idea of what the talent level is like and where the money goes, so you should be able to negotiate better with the extra information, and the history of what you've done.
Having said that, I don't see a lot of advice on the topic online. Obviously after spending some time at a company you have a better idea of what the talent level is like and where the money goes, so you should be able to negotiate better with the extra information, and the history of what you've done.