Flight Delays, Capacity Investment and Welfare under Air Transport Supply-demand Equilibrium

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1 Flght Delays, Capacty Investment and Welfare under Ar Transport Supply-demand Equlbrum Bo Zou 1, Mark Hansen 2 1 Unversty of Illnos at Chcago 2 Unversty of Calforna at Berkeley

2 2

3 Total economc mpact of flght delay: 3

4 Total economc mpact of flght delay: $32 bllon n

5 Total economc mpact of flght delay: $32 bllon n 2007 Ball, M., Barnhart, C., Dresner, M., Hansen, M. Neels, K., Odon, A., Peterson, E., Sherry, L., Tran, A., Zou, B., Total Delay Impact Study: A Comprehensve Assessment of the Costs and Impacts of Flght Delay n the Unted States. Major Partcpant. Report Prepared for the US Federal Avaton Admnstraton. Zou, B., Hansen, M., Impact of Operatonal Performance on Ar Carrer Cost Structure: Evdence from US Arlnes. Transportaton Research Part E: Logstcs and Transportaton Revew, 48 (6), Hansen, M., Zou, B., Arport Operatonal Performance and ts Impact on Arlne Cost. In: Odon, A. and Zografos, K. (eds.), Modelng and Managng Arport Performance: Theory and Practce, John Wley & Sons, Inc. 5

6 Means to mtgate flght delay Managng demand 6

7 Means to mtgate flght delay Managng demand Congeston prcng 7

8 Means to mtgate flght delay Managng demand Congeston prcng Slot control 8

9 Means to mtgate flght delay Managng demand Congeston prcng Slot control Swaroop, P., Zou, B., Ball, M., Hansen, M., Do More U.S. Arports Need Slot Controls? A Welfare Based Approach to Determne Slot Levels. Transportaton Research Part B: Methodologcal, (9), Ball, M., Hansen, M., Swaroop, P., Zou, B., Desgn and Justfcaton for Market-Based Approaches to Arport Congeston Management. In: Odon, A. and Zografos, K. (eds.), Modelng and Managng Arport Performance: Theory and Practce, John Wley & Sons, Inc. 9

10 Means to mtgate flght delay Managng demand Congeston prcng Slot control Swaroop, P., Zou, B., Ball, M., Hansen, M., Do More U.S. Arports Need Slot Controls? A Welfare Based Approach to Determne Slot Levels. Transportaton Research Part B: Methodologcal, (9), Ball, M., Hansen, M., Swaroop, P., Zou, B., Desgn and Justfcaton for Market-Based Approaches to Arport Congeston Management. In: Odon, A. and Zografos, K. (eds.), Modelng and Managng Arport Performance: Theory and Practce, John Wley & Sons, Inc. Increasng supply 10

11 Outlne Background Research Framework Equlbrum Model Concluson 11

12 Background Framework Framework Model 1 Model Model 2 Concluson Investment Infrastructure Capacty ( ) Benefts Arlne Cost Passenger travel tme ( ) ( ) Flght Delay ( ) 12

13 Background Framework Framework Model 1 Model Model 2 Concluson Issues wth the approach Ceters parbus assumpton Predctng future Investment Infrastructure Capacty ( ) Benefts Arlne Cost Passenger travel tme ( ) ( ) Flght Delay ( ) 13

14 Background Framework Framework Model 1 Model Model 2 Concluson Objectve of the Research Develop an nnovatve methodology to systematcally capture supply-demand response to nvestment 14

15 Background Framework Framework Model 1 Model Model 2 Concluson Outlne Background Research Framework Equlbrum Models Arlne competton model User equlbrum model Concluson 15

16 Background Framework Framework Model 1 Model Model 2 Concluson No congeston Hgher densty Hgher flght frequency Lower unt cost Improved servce qualty Lower fare Reduced generalzed cost More demand 16

17 Background Framework Framework Model 1 Model Model 2 Concluson Wth congeston Hgher densty Hgher flght frequency Lower unt cost Improved servce qualty Lower fare Reduced generalzed cost More demand 17

18 Background Framework Framework Model 1 Model Model 2 Concluson Demand Unconstraned user supply Demand (passenger-mles) 18

19 Background Framework Framework Model 1 Model Model 2 Concluson Demand Constraned user supply Unconstraned user supply Demand (passenger-mles) 19

20 Background Framework Framework Model 1 Model Model 2 Concluson Demand Constraned user supply Constraned user supply after nvestment Unconstraned user supply Demand (passenger-mles) 20

21 Background Framework Framework Model 1 Model Model 2 Concluson Demand Constraned user supply Constraned user supply after nvestment Unconstraned user supply Demand (passenger-mles) 21

22 Background Framework Framework Model 1 Model Model 2 Concluson Conventonal vew Investment Infrastructure Capacty Flght Delay 22

23 Background Framework Framework Model 1 Model Model 2 Concluson Proposed framework Investment Passenger Demand Flght Traffc Infrastructure Capacty Arfare Flght Delay Arlne Cost 23

24 Background Framework Framework Model 1 Model Model 2 Concluson Proposed framework Investment Passenger Demand Flght Traffc Infrastructure Capacty Arfare Flght Delay Maxmzng Proft Arlne Cost Output 24

25 Background Framework Framework Model 1 Model Model 2 Concluson Proposed framework Investment Passenger Demand Flght Traffc Infrastructure Capacty Arfare Flght Delay Maxmzng Proft Arlne Cost Output 25

26 Background Framework Framework Model 1 Model Model 2 Concluson Outlne Background Research Framework Equlbrum Models Concluson 26

27 Background Framework Framework Model 1 Model Model 2 Concluson Outlne Background Research Framework Equlbrum Models Arlne competton model User equlbrum model Concluson Zou, B., Hansen, M., Flght Delays, Capacty Investment and Socal Welfare under Ar Transport Supply-Demand Equlbrum. Transportaton Research Part A: Polcy and Practce 46 (6),

28 Demand Supply Equlbrum Equlbrum shft Consder a duopoly market 28

29 Demand Supply Equlbrum Equlbrum shft Consder a duopoly market Utlty of a representatve ndvdual U( q0, q1, q2 ) q0 ( q1 q2 ) ( 01q q1q2 01q ) 29

30 Demand Supply Equlbrum Equlbrum shft Consder a duopoly market Utlty of a representatve ndvdual U( q0, q1, q2 ) q0 ( q1 q2 ) ( 01q q1q2 01q 2 Consumpton of numerare goods ) 30

31 Demand Supply Equlbrum Equlbrum shft Consder a duopoly market Utlty of a representatve ndvdual U( q0, q1, q2 ) q0 ( q1 q2 ) ( 01q q1q2 01q 2 Consumpton of arlne 1 s servce ) 31

32 Demand Supply Equlbrum Equlbrum shft Consder a duopoly market Utlty of a representatve ndvdual U( q0, q1, q2 ) q0 ( q1 q2 ) ( 01q q1q2 01q 2 Consumpton of arlne 2 s servce ) 32

33 Demand Supply Equlbrum Equlbrum shft Consder a duopoly market Utlty of a representatve ndvdual U( q0, q1, q2 ) q0 ( q1 q2 ) ( 01q q1q2 01q ) 02: parameters ( 01 ) 00, 01, 02 33

34 Demand Supply Equlbrum Equlbrum shft max U( q0, q1, q2) s. t. q 0 Pq 1 1 P2 q2 I 34

35 Demand Supply Equlbrum Equlbrum shft max U( q0, q1, q2) s. t. q 0 Pq 1 1 P2 q2 I Generalzed cost for choosng arlne 1 35

36 Demand Supply Equlbrum Equlbrum shft max U( q0, q1, q2) s. t. q 0 Pq 1 1 P2 q2 I Generalzed cost for choosng arlne 2 36

37 Demand Supply Equlbrum Equlbrum shft max U( q0, q1, q2) s. t. P q 0 Pq 1 1 P2 q2 P kl f I 1,2 37

38 Demand Supply Equlbrum Equlbrum shft max U( q0, q1, q2) s. t. P q 0 Pq 1 1 P2 q2 P f kl I 1,2 Arfare 38

39 Demand Supply Equlbrum Equlbrum shft max U( q0, q1, q2) s. t. P q 0 Pq 1 1 P2 q2 P f kl I 1,2 Arfare Schedule delay 39

40 Demand Supply Equlbrum Equlbrum shft max U( q0, q1, q2) s. t. P q 0 Pq 1 1 P2 q2 P f kl I 1,2 Arfare Schedule delay Delay 40

41 Demand Supply Equlbrum Equlbrum shft max U( q0, q1, q2) Composte of ncome and travel tme constrants s. t. P q 0 Pq 1 1 P2 q2 P f kl I 1,2 Arfare Schedule delay Delay 41

42 Demand Supply Equlbrum Equlbrum shft Indvdual demand q ( ) 00 01P 02P kl, 1,2 f f ( )

43 Demand Supply Equlbrum Equlbrum shft q Indvdual demand ( ) 00 01P 02P kl, 1,2 f f ( ) 02 Market demand 01 Q P 2P L, 1,2 f f ( 1 2) 43

44 Demand Supply Equlbrum Equlbrum shft Flght operatng cost for trp C c 0 s s L 44

45 Demand Supply Equlbrum Equlbrum shft Flght operatng cost for trp C c 0 s s L Fxed cost 45

46 Demand Supply Equlbrum Equlbrum shft Flght operatng cost for trp C c 0 s s L Fxed cost Varable cost as a functon of arcraft sze s 46

47 Demand Supply Equlbrum Equlbrum shft Flght operatng cost for trp C c 0 s s L Fxed cost Varable cost as a functon of arcraft sze s Delay cost as a functon of arcraft sze s and delay L 47

48 Demand Supply Equlbrum Equlbrum shft Flght operatng cost for trp C c 0 s s L Fxed cost Varable cost as a functon of arcraft sze s Delay cost as a functon of arcraft sze s and delay L 48

49 Demand Supply Equlbrum Equlbrum shft Assumpton: each flght s full 49

50 Demand Supply Equlbrum Equlbrum shft Assumpton: each flght s full Q f s Passenger demand Flght frequency Arcraft sze 50

51 Demand Supply Equlbrum Equlbrum shft max P Q f C for 1,2 51

52 Demand Supply Equlbrum Equlbrum shft max P Q f C for 1,2 Arfare Passenger demand Flght frequency Operatng cost per flght 52

53 Demand Supply Equlbrum Equlbrum shft Assume arlnes compete on fare and frequency smultaneously n a Nash fashon 0 0 1,2 P f 53

54 Demand Supply Equlbrum Equlbrum shft Assume arlnes compete on fare and frequency smultaneously n a Nash fashon Symmetrc arlnes 0 0 1,2 P f P P P 1 2 f f f

55 ) ( 2 L L f P 55 Demand Supply Equlbrum Prce response Equlbrum shft

56 ) ( 2 L L f P 56 Demand Supply Equlbrum Prce response Constant Equlbrum shft

57 Demand Supply Equlbrum Equlbrum shft Prce response P ( 1 2) 0 1 f L 1L Constant Frequency effect on WTP 57

58 Demand Supply Equlbrum Equlbrum shft Prce response P ( 1 2) 0 1 f L 1L Constant Frequency effect on WTP Delay effect on WTP 58

59 Demand Supply Equlbrum Equlbrum shft Prce response P ( 1 2) 0 1 f L 1L Constant Frequency effect on WTP Delay effect on WTP Arlne delay cost passed onto passengers 59 59

60 Demand Supply Equlbrum Equlbrum shft Compare equlbrum wth and wthout congeston 60

61 Demand Supply Equlbrum Equlbrum shft Compare equlbrum wth and Wth congeston Frequency ( ) wthout congeston 61

62 Demand Supply Equlbrum Equlbrum shft Compare equlbrum wth and Wth congeston Frequency ( ) wthout congeston Passenger generalzed cost ( ) 62

63 Demand Supply Equlbrum Equlbrum shft Compare equlbrum wth and Wth congeston Frequency ( ) wthout congeston Passenger generalzed cost ( ) Passenger demand ( ) 63

64 Demand Supply Equlbrum Equlbrum shft Compare equlbrum wth and Wth congeston Frequency ( ) wthout congeston Passenger generalzed cost ( ) Passenger demand ( ) Fare (?) Arcraft sze (?) Unt operatng cost per passenger (?) 64

65 Demand Supply Equlbrum Equlbrum shft Smulaton analyss 65

66 Demand Supply Equlbrum Equlbrum shft Smulaton analyss Assumpton about arport delay L Delay on a market s determned by the more congested arport N ndependent and dentcal markets nto that arport 66

67 Demand Supply Equlbrum Equlbrum shft Smulaton analyss Assumpton about arport delay L L [ N( f f K )/ ], Total arport traffc Arport capacty 67

68 Demand Supply Equlbrum Equlbrum shft Smulaton analyss Assumpton about arport delay L L [ N( f K 1 f2)/ ], 1 All other parameters derved from emprcal evdence 68

69 Demand Supply Equlbrum Equlbrum shft Scenaros Fare Arcraft sze Unt operatng cost ($/passenger) Infnte capacty (no delay) Fnte capacty (720 operatons per day, wth delay)

70 Demand Supply Equlbrum Equlbrum shft Scenaros Fare Arcraft sze Unt operatng cost ($/passenger) Infnte capacty (no delay) Fnte capacty (720 operatons per day, wth delay) Decreased WTP domnates arlnes tendency to pass part of the delay cost to passengers 70

71 Demand Supply Equlbrum Equlbrum shft Scenaros Fare Arcraft sze Unt operatng cost ($/passenger) Infnte capacty (no delay) Fnte capacty (720 operatons per day, wth delay) Use larger planes to avod hgh delays 71

72 Demand Supply Equlbrum Equlbrum shft Scenaros Fare Arcraft sze Unt operatng cost ($/passenger) Infnte capacty (no delay) Fnte capacty (720 operatons per day, wth delay) Delay cost partally offset by economes of arcraft sze 72

73 Demand Supply Equlbrum Equlbrum shft Comparson between equlbrum and conventonal approaches 73

74 Demand Supply Equlbrum Equlbrum shft Increase arport capacty by 50% 74

75 Demand Supply Equlbrum Equlbrum shft Increase arport capacty by 50% Conventonal 5.6 Equlbrum 4.7 Arport delay savng (mn/flght) 75

76 Demand Supply Equlbrum Equlbrum shft Increase arport capacty by 50% Conventonal 5.6 Equlbrum 4.7 Equlbrum 163 Conventonal 70 Arport delay savng (mn/flght) Consumer surplus (mllon$) 76

77 Outlne Background Research Framework Equlbrum Models Arlne competton model User equlbrum model Concluson 77

78 Introducton of basc concepts Route Segment Market Non-stop Route Segment AB Spoke cty B Segment CB One-stop Route Spoke cty A Segment AC Hub cty C 78

79 Demand Supply Equlbrum Equlbrum shft Demand estmaton 79

80 Demand NL3B Supply Equlbrum Equlbrum shft Scale λ m Nest structure Ar Non-Ar Scale λ a O-D Arport Scale λ p O 1 O 1 H 1 D 1 O 1 H 2 D 1 O 1 H h D 1 D 1 O 1 D 2 O 1 H 1 D 2 O 1 H 2 D 2 O 1 H h D 2 O o D n O o H 1 D n O o H 2 D n O o H h D n Source: Hsao, C. and Hansen, M., A passenger demand model for ar transportaton n a hub-and-spoke network. Transportaton Research Part E: Logstcs 80 and Transportaton Revew, Vol. 47,

81 Demand Supply Equlbrum Equlbrum shft User equlbrum formulaton Demand = G 1 (Fare, Flght Traffc, Arport delay) s.t. Constrants 81

82 Demand Supply Equlbrum Equlbrum shft Investment Passenger Demand Flght Traffc Infrastructure Capacty Arfare Flght Delay Maxmzng Proft Arlne Cost Output 82

83 Demand Supply Equlbrum Equlbrum shft Flght traffc = G 2 (Demand, Arport Delay) Fare = G 3 (Demand, Arport delay) Arport delay= G 4 (Flght traffc) Zou, B., Hansen, M. Flght Delay Impact on Arfare and Flght Frequency: A Comprehensve Assessment. Paper to be submtted to Transportaton Research Part 83 A.

84 Demand Supply Equlbrum Equlbrum shft (++) (-) Flght traffc = G 2 (Demand, Arport delay) (+/-) (+) Fare = G 3 (Demand, Arport delay) (++) Arport delay= G 4 (Flght traffc) 84

85 Demand Supply Equlbrum Equlbrum shft User equlbrum formulaton Demand = G 1 (Fare, Flght Traffc, Arport delay) s.t. Flght traffc = G 2 (Demand, Arport delay) Fare = G 3 (Demand, Arport delay) Arport delay= G 4 (Flght traffc) 85

86 Demand Supply Equlbrum Equlbrum shft Smultaneous equaton system Demand = G 1 (Fare, Flght Traffc, Arport delay) Flght traffc = G 2 (Demand, Arport delay) Fare = G 3 (Demand, Arport delay) Arport delay= G 4 (Flght traffc) 86

87 Demand Supply Equlbrum Equlbrum shft Smulaton analyss 87

88 Demand Supply Equlbrum Equlbrum shft Network S 50 S 1 S 2 S 3 H 400 mles S S j 88

89 Demand Supply Equlbrum Equlbrum shft Network S 50 S 1 S 2 S 3 H 400 mles S S j 89

90 Demand Demand Supply Equlbrum Equlbrum shft stop 1-stop Spoke-spoke market demand O-D Dstance (mles)

91 Demand Demand Supply Equlbrum Equlbrum shft stop 1-stop Spoke-spoke market demand Total demand s low because the dstance s too short O-D Dstance (mles)

92 Demand Demand Supply Equlbrum Equlbrum shft stop 1-stop Spoke-spoke market demand 1-stop routes more attractve because of reduced crcuty (actually dstance/ OD dstance) O-D Dstance (mles)

93 Flghts/quarter Demand Supply Equlbrum Equlbrum shft 250 Spoke-spoke segment frequency Segment Dstance (mles) 93

94 Demand Supply Equlbrum Equlbrum shft Delay (mn/flght) Hub Spoke Before

95 Demand Supply Equlbrum Equlbrum shft Increase hub capacty by 50% Delay (mn/flght) Hub Spoke Before

96 Demand Supply Equlbrum Equlbrum shft Increase hub capacty by 50% Delay (mn/flght) Hub Spoke Before After

97 Demand Demand Supply Equlbrum Equlbrum shft Spoke-spoke market demand shft 0-stop (before) 1-stop (before) 0-stop (after) 1-stop (after) O-D Dstance (mles)

98 Total Demand Demand Supply Equlbrum Equlbrum shft Before After Total spoke-spoke market demand O-D Dstance

99 Total Demand Demand Supply Equlbrum Equlbrum shft Before After Total spoke-spoke market demand Induced demand O-D Dstance

100 Flghts/quarter Demand Supply Equlbrum Equlbrum shft Spoke-spoke segment frequency change 250 Before 200 After Segment Dstance (mles)

101 Flghts/quarter Demand Supply Equlbrum Equlbrum shft Spoke-hub segment frequency change Before After

102 $ Demand Supply Equlbrum Equlbrum shft Consumer surplus change per ar travel decson makng Negatve Dstance (mles) 102

103 Demand Supply Equlbrum Equlbrum shft Comparson between equlbrum and conventonal approaches 103

104 Background Framework Model Concluson Other Research Conventonal 14.2 Demand Supply Equlbrum Equlbrum shft Equlbrum 9.0 Hub delay savngs (mn/flght) 104

105 Background Framework Model Concluson Other Research Demand Supply Equlbrum Equlbrum shft Conventonal 14.2 Equlbrum Equlbrum 9.0 Conventonal 69.5 Hub delay savngs (mn/flght) Passenger welfare gan (mllon$/qtr) 105

106 Outlne Background Research Framework Equlbrum Models Arlne competton model User equlbrum model Concluson 106

107 Summary An equlbrum framework 107

108 Summary An equlbrum framework Larger and broader benefts 108

109 Summary An equlbrum framework Larger and broader benefts Addtonal nsghts Delay trggers nvestment 109

110 Summary An equlbrum framework Larger and broader benefts Addtonal nsghts Delay trggers nvestment Returns more than delay savngs 110

111 Summary An equlbrum framework Larger and broader benefts Addtonal nsghts Delay trggers nvestment Returns more than delay savngs Delay reducton less than expected 111

112 Summary An equlbrum framework Larger and broader benefts Addtonal nsghts Delay trggers nvestment Returns more than delay savngs Delay reducton less than expected Investment paradox: some markets can be worse off 112

113 Extensons 113

114 Extensons Infrastructure nvestment decson makng Sze, locaton, tmng 114

115 Extensons Infrastructure nvestment decson makng Sze, locaton, tmng Envronmental externaltes 115

116 Extensons Infrastructure nvestment decson makng Sze, locaton, tmng Envronmental externaltes Consder ntermodal competton 116

117 Thank you! Questons? 117

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