Trick or Treating

I'm curious how an economist would characterize the basic transaction involved in trick or treating I mean it's a kid rings a doorbell says trick or treat and asks for candy essentially from an economist's perspective. Is this basically a type of begging is it a kind of charity that's going on here or is it a type of blackmail that invocation of a trick alongside the request for a treat? Would an economist identify in inefficiency and giving each kid the same amount of candy by offering more candy to kids who've put more effort into their costumes say?"So yeah what is the economic analysis of trick or treating"? "Yeah we're all good like we love you stay where you are most of the