We have seen a lot of rising prices recently mainly on food items because of the devaluation of the pound. Now OPEC has agreed to limit oil production and we could see rising prices associated with that. This price rise will be delayed, higher oil prices mean higher production costs in the future. The higher heating oil, diesel prices and petrol prices will come sooner, maybe before the end of the winter.
In social psychology, reciprocity is a social rule that says people should repay, in kind, what another person has provided for them; that is, people give back (reciprocate) the kind of treatment they have received from another. By virtue of the rule of reciprocity, people are obligated to repay favours, gifts, invitations, etc. in the future.