From Longman Business Dictionary
bargainingbar·gain·ing /ˈbɑːgənɪŋˈbɑːr-/ noun [uncountableU] HUMAN RESOURCESCOMMERCEdiscussion to reach agreement about something, for example trade, levels of pay etcThere will be some hard bargaining between the US and Europe.
→ collective bargaining → wage bargaining → workplace bargaining