John Panzar has characterized street delivery as a bottleneck function because a single firm can deliver to a recipient at a lower total cost than multiple firms delivering to the same customer.
( ( John Panzar ) ( ( has ( ( characterized ( street delivery ) ) ( as ( ( a bottleneck ) ( function ( because ( ( a ( single firm ) ) ( can ( ( deliver ( to ( a recipient ) ) ) ( at ( ( a ( lower ( total cost ) ) ) ( than ( ( multiple firms ) ( delivering ( to ( the ( same customer ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP John) (NNP Panzar)) (VP (VBZ has) (VP (VBN characterized) (NP (NN street) (NN delivery)) (SBAR (IN as) (S (NP (DT a) (NN bottleneck)) (VP (VBP function) (SBAR (IN because) (S (NP (DT a) (JJ single) (NN firm)) (VP (MD can) (VP (VB deliver) (PP (TO to) (NP (DT a) (JJ recipient))) (PP (IN at) (NP (NP (DT a) (JJR lower) (JJ total) (NN cost)) (PP (IN than) (NP (NP (JJ multiple) (NNS firms)) (VP (VBG delivering) (PP (TO to) (NP (DT the) (JJ same) (NN customer))))))))))))))))) (. .)))
John Panzar points out that it is cheaper for one firm to deliver goods than it is for multiple firms delivering to the same customer.
( ( John Panzar ) ( ( ( points out ) ( that ( it ( ( ( is ( cheaper ( for ( one firm ) ) ) ) ( to ( deliver goods ) ) ) ( than ( it ( is ( for ( ( multiple firms ) ( delivering ( to ( the ( same customer ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP John) (NNP Panzar)) (VP (VBZ points) (PRT (RP out)) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ is) (ADJP (ADJP (JJR cheaper)) (PP (IN for) (NP (CD one) (NN firm)))) (S (VP (TO to) (VP (VB deliver) (NP (NNS goods))))) (SBAR (IN than) (S (NP (PRP it)) (VP (VBZ is) (PP (IN for) (NP (NP (JJ multiple) (NNS firms)) (VP (VBG delivering) (PP (TO to) (NP (DT the) (JJ same) (NN customer))))))))))))) (. .)))