    Sentence i: John Panzar hhas: characterized  street: delivery “as: # Bottleneck: function  because-a single firm can deliver to = recipient  at a lower total’. cost than: multiple firms    delivering: ./:t0 the", .same "customer:           Sentenct-2: °», Thére-ate no. Cost differences,  Tcrording co. John Panzar, between “ome, Of  tyltiple firms delivering to a customer. 4    