Serial is defined as a series of sequential exchanges between parties. This set of exchanges is unique because they do not occur between two people in a closed quid pro quo arrangement. Instead, Serial Reciprocity is when people repay the benefits they have received by providing benefits to a third party, someone other than their benefactor.
Reciprocity is defined as a mutual exchange.
Serial Reciprocity differs from other forms of Reciprocity because the original donor or volunteer does not receive anything tangible, measurable or immediate in return for his or her initial good deed.
Thus, in Serial Reciprocity, individuals “pay it forward” instead of paying it back.