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2 
A GUESSING GAME 
I’ve picked a number between 1 and 100 
You get 5 guesses. 
If you are correct on 1st guess, you get $100 
If you are correct on 2nd guess, you get $80 
If you are correct on 3rd guess, you get $60 
If you are correct on 4th guess, you get $40 
If you are correct on 5th guess, you get $20 
Game is real
3 
A GUESSING GAME 
Hint: Each time, I’ll say if you’re too high or too low
4 
My Prediction 
50 
25 
37 
43
5 
48
6
11 
Dividing 
Costs 
Negotiation
12 
AIRFARES 
¤ Split the total 
$1,243 
» Houston pays $1,409 
» SF pays $1,409 
$666 
$909
13 
$666 
$1,243 
$909
14 
AIRFARES 
¤ Split the total 
$1,243 
» Houston pays $1,409 
» SF pays $1,409 
$666 
$909
15 
AIRFARES 
¤ Split Houston leg 
» Houston pays $666 + $909/2 = $1,120.50 
» SF pays $1,243 + $909/2 = $1,697.50
16 
$666 
$1,243 
$1,243 
$454.50 
$4$5646.560 
$454.50 
$454.50
17 
AIRFARES 
¤ Split Houston leg 
» Houston pays $666 + $909/2 = $1,120.50 
» SF pays $1,243 + $909/2 = $1,697.50 
¤ Split costs proportionally 
» Houston pays 1,332/(3,818)*2,818 = $983 
» SF pays 2,486/(3,818)*2,818 = $1,835
18 
AIRFARES 
¤ Split Houston leg 
» Houston pays $666 + $909/2 = $1,120.50 
» SF pays $1,243 + $909/2 = $1,697.50 
¤ Split costs proportionally 
» Houston pays 1,332/(3,818)*2,818 = $983 
» SF pays 2,486/(3,818)*2,818 = $1,835
19 
AIRFARES 
¤ Split Houston leg 
» Houston pays $666 + $909/2 = $1,120.50 
$1,243 
» SF pays $1,243 + $909/2 = $1,697.50 
¤ Split costs proportionally 
» Houston pays 1,332/($666 
3,818)*2,818 = $983 
» SF pays 2,486/(3,818)*2,818 = $1,835 
$592 
$317
21 
AIRFARES 
¤ Split Total 
» Houston pays $1,409 
» SF pays $1,409 
» Problem is that this is more than Houston roundtrip 
¤ Split Houston leg 
» Houston pays $666 + $909/2 = $1,120.50 
» SF pays $1,243 + $909/2 = $1,697.50 
¤ Split costs proportionally 
» Houston pays 1,332/(3,818)*2,818 = $983 
» SF pays 2,486/(3,818)*2,818 = $1,835
22 
AIRFARES 
¤ Split Total 
» Houston pays $1,409 
» SF pays $1,409 
» Problem is that this is more than Houston roundtrip 
¤ Split Houston leg 
» Houston pays $666 + $909/2 = $1,120.50 
» SF pays $1,243 + $909/2 = $1,697.50 
¤ Split costs proportionally 
» Houston pays 1,332/(3,818)*2,818 = $983 
» SF pays 2,486/(3,818)*2,818 = $1,835
23 
Two Extreme Positions 
SF says to Houston: You pay $1,332. That’s 
what you would have paid anyway.
24 
What’s the best 
argument for 
Houston?
25 
Two Extreme Positions 
SF says to Houston: You pay $1,332. That’s 
what you would have paid anyway. 
$1,243 
Houston says to SF: You pay $2,486. That’s 
what you would have paid anyway. $742 
$99
26 
AIRFARES 
¤ NY --> Houston --> SF --> NY $2,818 
¤ Total with two trips is $1,000 more 
¤ NY --> Houston roundtrip $1,332 
¤ NY --> SF roundtrip $2,486 
Total $3,818 
The $1,000 savings requires both firms 
equally. If either doesn’t cooperate, then 
1k is lost. Hence split savings.
27 
AIRFARES 
¤ Split Houston leg 
» Houston pays $666 + $909/2 = $1,120.50 
» SF pays $1,243 + $909/2 = $1,697.50 
¤ Split costs proportionally 
» Houston pays 1,332/(3,818)*2,818 = $983 
» SF pays 2,486/(3,818)*2,818 = $1,835 
¤ Split $1,000 cost savings 
» Houston pays $1,332 - $500 = $832 
» SF pays $2,486 - $500 = $1,986
28 
$666 
$1,243 
$743 
$166
29 
Quick Test
Runway Problem — Littlechild and Owen (1973) 
Runway Problem –Littlechild and Owen (1973) 
36
Airline A needs runway of length 1 
Airline B needs runway of length 2 
1 
Runway Problem 
A B 
1
A & B split cost of first leg 
B pays cost of second leg 
1 
Runway Problem 
A B 
1 
A pays 0.5 
B pays 1.5
Uber Pool 
Uber Pool 
37
Alice and Bob share an Uber from LAX 
Alice gets dropped off first. 
How should they split the $12 fare? 
A 6 B 
6 
LAX Alice pays 3 
Bob pays 3 + 6?
A 6 B 
6 
Now what? 
LAX 
Alice pays 3 
Bob pays 3 + 6?
Do we split the fare in proportion to the 
one-way fares? 
A pays 6/17 * $12 
B pays 11/17 * $12 
A 6 B 
6 
LAX 
11
What’s the Pie? 
11 + 6 – 12 = $5 
A 6 B 
Alice pays 
Bob pays 
6 
LAX 
11
What’s the Pie? 
11 + 6 – 12 = $5 
Alice pays 6 – 2.50 = $3.50 
Bob pays 11 – 2.50 = $8.50 
A 6 B 
6 
LAX 
11
A 6 
B 
11 
Diversion version 
Alice and Bob split first leg (Alice & Bob pay 3) 
Bob pays 6 by self 
Diversion cost is 1 (12 versus 11 for Bob) 
Who should pay cost of diversion? 
6 
LAX
A 6 
B 
11 
Diversion version 
Alice and Bob split first leg (Alice & Bob pay 3) 
Bob pays 6 by self 
Diversion cost is 1 (12 versus 11 for Bob) 
Alice since Alice is out of the way 
6 
LAX 
A’ 
If only Alice lived here
A 6 
B 
Diversion version 
Alice and Bob split first leg (Alice & Bob pay 3) 
Bob pays 6 by self 
Diversion cost is 1 (12 versus 11 for Bob) 
Bob since Bob is out of the way 
6 
LAX 
B’ 
If only Bob 
lived here
Split diversion cost: they are equally out of the 
way 
Alice pays half diversion cost: 3 + 0.5 = $3.50 
A 6 
B 
11 
Bob pays 2.5 + 6 = $8.50 
6 
LAX
What if Alice gets in first, then picks up Bob, 
then gets out along the way? 
6 
A 
B 
6 
A exits 
11 9 
B exits 
6
No agreement: Alice pays 11 & Bob pays 9 
Agreement: Total cost is 6 + 6 + 6 = 18 
Pie = 20 – 18 = 2 
Alice pays 11 – 1 = 10 
Bob pays 9 – 1 = 8 
6 
A 
B 
6 
A exits 
11 9 
B exits 
6
Diversion Version 
Alice pays full 6 – since he is alone 
Alice pays 3 (splitting second leg with Bob) 
Bob diversion effect is (12 – 11) => Bob pays Alice 0.5 
Alice diversion effect is (12 – 9) => Alice pays Bob 1.5 
Alice pays 6 + 3 – 0.5 + 1.5 = 10 
6 
A 
B 
6 
A exits 
11 9 
B exits 
6
47
What is the Pie 
¤ Agreement A + B get 300 – 50 = $250 
¤ No Agreement A gets 100 – 50 = $50 
B gets 200 – 50 = $150 
No Agreement Total $200 
¤ Hence the pie is $50
What is the Pie 
¤ Agreement A + B get 300 – 50 = $250 
¤ No Agreement A gets 100 – 50 = $50 
B gets 200 – 50 = $150 
Thus A gets $50 + $25 = $75 
B gets $150 + $25 = $175
50 
Merger 
Case
51 
Joint Purchasing 
¤ Gazette proposes splitting gains proportionately: 2 for 
Gazette to 1 for Post 
¤ Post says split them the other way (Post gets 
2/3rds!). It is Post extra volume that saves Gazette 
money. Hence Post should get all of that gain. 
Gazette can keep savings created by its ability to 
lower Post costs. 
¤ Above is rhetorical argument. Point is that both gains 
should be split evenly.
52 
Symmetry 
Every argument can 
be turned around
53 
Cost Savings 
¤ Gazette has better know how => 
gets to keep full $1m savings
54 
Cost Savings 
¤ Gazette has better know how => 
gets to keep full $1m savings 
¤ Post brings to the table worse costs. If 
costs were lower, less savings to be 
had.
55 
Macro Perspective 
¤ Current values are 10m and 22m. 
¤ New joint value is 41.85m 
¤ Create 9.85m 
¤ Split gain evenly 
¤ Gazette pays 10 + 4.925 = 14.925m 
¤ If Post walks away, 9.85m is lost
56 
TCC and HT 
¤ Coke purchasing power helped Honest 
reduce the cost of plastic bottle from 
19¢ to 11¢. 
¤ On 100 million bottles that’s worth 
¤ Who should get this gain?
57 
TCC and HT 
¤ Pay market multiple on sales up to 
$XXm 
¤ Pay 0.5 * market multiple on sales 
thereafter
58 
Rio Tinto & BHP 
¤ $30 billion of synergies 
¤ Market caps: $160b and $250b.
59 
Power in Negotiations 
¤ Doesn’t exist! 
¤ Once you define the Pie, the two are 
symmetric.
60 
What Might it Mean? 
¤ Token example 
¤ 101 tokens. Each is worth 
¤ $1 to Alice, 1¢ to Bob 
¤ Does that mean Alice gets 1 and Bob gets 
100 – so that they both end up with $1
61 
What Might it Mean? 
¤ Token example 
¤ 101 tokens. Each is worth $1 to Alice, 
1¢ to Bob 
¤ No. Alice is then giving up $100 while Bob 
is giving up 1¢. Why look at equality in 
payoff versus sacrifice?
69 
Physician Group Purchase 
¤ One buyer (Hospital) 
¤ Two physician groups 
¤ V(0) = 0 no deal 
¤ V(1) = 100 buy one group 
¤ V(2) = 120 buy both 
¤ If doctors merge, then 120 or 0 
¤ H gets 60; doctors get 60 (30 to each)
Zincit 
¤ New drug for Acid Reflux. 
¤ Zums has offered $20m. They plan to use drug 
as dietary supplement so no FDA approval 
required. This is their best offer. 
¤ Zincit will apply for FDA approval. If approved, 
will earn profits of $120m. If not, then will make 
$20m. 
¤ Seller thinks chance of approval is 60%. 
¤ Buyer thinks it is 10%.
What is the Pie? 
First cut: Increasing profit from 20m to 120m in event of approval 
So it is $100m. Split it: 50m to each 
Simple deal: Pay $20m upfront + 50% of profits above $20m 
Probabilities are irrelevant
More Pie? 
To maximize the pie, seller should get $100m bonus if FDA 
approval. 
Worth $60m to seller and costs buyer $10m. 
Best case for Seller / worst for Buyer: $15m upfront + $100m bonus 
Worst case for Seller / best for Buyer: –$10m signing + $100m bonus 
Midpoint: $2.5 upfront + $100m FDA bonus
73 
What is the Pie? 
Two levels 
Level 1: Buy company and create chance of getting extra $100m 
That suggests $20m upfront + $50m bonus 
Level 2: Trade upfront for more bonus

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Barry Nalebuff Presenation Slides

  • 1.
  • 2. 2 A GUESSING GAME I’ve picked a number between 1 and 100 You get 5 guesses. If you are correct on 1st guess, you get $100 If you are correct on 2nd guess, you get $80 If you are correct on 3rd guess, you get $60 If you are correct on 4th guess, you get $40 If you are correct on 5th guess, you get $20 Game is real
  • 3. 3 A GUESSING GAME Hint: Each time, I’ll say if you’re too high or too low
  • 4. 4 My Prediction 50 25 37 43
  • 6. 6
  • 7.
  • 8.
  • 9.
  • 10.
  • 11. 11 Dividing Costs Negotiation
  • 12. 12 AIRFARES ¤ Split the total $1,243 » Houston pays $1,409 » SF pays $1,409 $666 $909
  • 14. 14 AIRFARES ¤ Split the total $1,243 » Houston pays $1,409 » SF pays $1,409 $666 $909
  • 15. 15 AIRFARES ¤ Split Houston leg » Houston pays $666 + $909/2 = $1,120.50 » SF pays $1,243 + $909/2 = $1,697.50
  • 16. 16 $666 $1,243 $1,243 $454.50 $4$5646.560 $454.50 $454.50
  • 17. 17 AIRFARES ¤ Split Houston leg » Houston pays $666 + $909/2 = $1,120.50 » SF pays $1,243 + $909/2 = $1,697.50 ¤ Split costs proportionally » Houston pays 1,332/(3,818)*2,818 = $983 » SF pays 2,486/(3,818)*2,818 = $1,835
  • 18. 18 AIRFARES ¤ Split Houston leg » Houston pays $666 + $909/2 = $1,120.50 » SF pays $1,243 + $909/2 = $1,697.50 ¤ Split costs proportionally » Houston pays 1,332/(3,818)*2,818 = $983 » SF pays 2,486/(3,818)*2,818 = $1,835
  • 19. 19 AIRFARES ¤ Split Houston leg » Houston pays $666 + $909/2 = $1,120.50 $1,243 » SF pays $1,243 + $909/2 = $1,697.50 ¤ Split costs proportionally » Houston pays 1,332/($666 3,818)*2,818 = $983 » SF pays 2,486/(3,818)*2,818 = $1,835 $592 $317
  • 20. 21 AIRFARES ¤ Split Total » Houston pays $1,409 » SF pays $1,409 » Problem is that this is more than Houston roundtrip ¤ Split Houston leg » Houston pays $666 + $909/2 = $1,120.50 » SF pays $1,243 + $909/2 = $1,697.50 ¤ Split costs proportionally » Houston pays 1,332/(3,818)*2,818 = $983 » SF pays 2,486/(3,818)*2,818 = $1,835
  • 21. 22 AIRFARES ¤ Split Total » Houston pays $1,409 » SF pays $1,409 » Problem is that this is more than Houston roundtrip ¤ Split Houston leg » Houston pays $666 + $909/2 = $1,120.50 » SF pays $1,243 + $909/2 = $1,697.50 ¤ Split costs proportionally » Houston pays 1,332/(3,818)*2,818 = $983 » SF pays 2,486/(3,818)*2,818 = $1,835
  • 22. 23 Two Extreme Positions SF says to Houston: You pay $1,332. That’s what you would have paid anyway.
  • 23. 24 What’s the best argument for Houston?
  • 24. 25 Two Extreme Positions SF says to Houston: You pay $1,332. That’s what you would have paid anyway. $1,243 Houston says to SF: You pay $2,486. That’s what you would have paid anyway. $742 $99
  • 25. 26 AIRFARES ¤ NY --> Houston --> SF --> NY $2,818 ¤ Total with two trips is $1,000 more ¤ NY --> Houston roundtrip $1,332 ¤ NY --> SF roundtrip $2,486 Total $3,818 The $1,000 savings requires both firms equally. If either doesn’t cooperate, then 1k is lost. Hence split savings.
  • 26. 27 AIRFARES ¤ Split Houston leg » Houston pays $666 + $909/2 = $1,120.50 » SF pays $1,243 + $909/2 = $1,697.50 ¤ Split costs proportionally » Houston pays 1,332/(3,818)*2,818 = $983 » SF pays 2,486/(3,818)*2,818 = $1,835 ¤ Split $1,000 cost savings » Houston pays $1,332 - $500 = $832 » SF pays $2,486 - $500 = $1,986
  • 27. 28 $666 $1,243 $743 $166
  • 29. Runway Problem — Littlechild and Owen (1973) Runway Problem –Littlechild and Owen (1973) 36
  • 30. Airline A needs runway of length 1 Airline B needs runway of length 2 1 Runway Problem A B 1
  • 31. A & B split cost of first leg B pays cost of second leg 1 Runway Problem A B 1 A pays 0.5 B pays 1.5
  • 32. Uber Pool Uber Pool 37
  • 33. Alice and Bob share an Uber from LAX Alice gets dropped off first. How should they split the $12 fare? A 6 B 6 LAX Alice pays 3 Bob pays 3 + 6?
  • 34. A 6 B 6 Now what? LAX Alice pays 3 Bob pays 3 + 6?
  • 35. Do we split the fare in proportion to the one-way fares? A pays 6/17 * $12 B pays 11/17 * $12 A 6 B 6 LAX 11
  • 36. What’s the Pie? 11 + 6 – 12 = $5 A 6 B Alice pays Bob pays 6 LAX 11
  • 37. What’s the Pie? 11 + 6 – 12 = $5 Alice pays 6 – 2.50 = $3.50 Bob pays 11 – 2.50 = $8.50 A 6 B 6 LAX 11
  • 38. A 6 B 11 Diversion version Alice and Bob split first leg (Alice & Bob pay 3) Bob pays 6 by self Diversion cost is 1 (12 versus 11 for Bob) Who should pay cost of diversion? 6 LAX
  • 39. A 6 B 11 Diversion version Alice and Bob split first leg (Alice & Bob pay 3) Bob pays 6 by self Diversion cost is 1 (12 versus 11 for Bob) Alice since Alice is out of the way 6 LAX A’ If only Alice lived here
  • 40. A 6 B Diversion version Alice and Bob split first leg (Alice & Bob pay 3) Bob pays 6 by self Diversion cost is 1 (12 versus 11 for Bob) Bob since Bob is out of the way 6 LAX B’ If only Bob lived here
  • 41. Split diversion cost: they are equally out of the way Alice pays half diversion cost: 3 + 0.5 = $3.50 A 6 B 11 Bob pays 2.5 + 6 = $8.50 6 LAX
  • 42. What if Alice gets in first, then picks up Bob, then gets out along the way? 6 A B 6 A exits 11 9 B exits 6
  • 43. No agreement: Alice pays 11 & Bob pays 9 Agreement: Total cost is 6 + 6 + 6 = 18 Pie = 20 – 18 = 2 Alice pays 11 – 1 = 10 Bob pays 9 – 1 = 8 6 A B 6 A exits 11 9 B exits 6
  • 44. Diversion Version Alice pays full 6 – since he is alone Alice pays 3 (splitting second leg with Bob) Bob diversion effect is (12 – 11) => Bob pays Alice 0.5 Alice diversion effect is (12 – 9) => Alice pays Bob 1.5 Alice pays 6 + 3 – 0.5 + 1.5 = 10 6 A B 6 A exits 11 9 B exits 6
  • 45. 47
  • 46. What is the Pie ¤ Agreement A + B get 300 – 50 = $250 ¤ No Agreement A gets 100 – 50 = $50 B gets 200 – 50 = $150 No Agreement Total $200 ¤ Hence the pie is $50
  • 47. What is the Pie ¤ Agreement A + B get 300 – 50 = $250 ¤ No Agreement A gets 100 – 50 = $50 B gets 200 – 50 = $150 Thus A gets $50 + $25 = $75 B gets $150 + $25 = $175
  • 49. 51 Joint Purchasing ¤ Gazette proposes splitting gains proportionately: 2 for Gazette to 1 for Post ¤ Post says split them the other way (Post gets 2/3rds!). It is Post extra volume that saves Gazette money. Hence Post should get all of that gain. Gazette can keep savings created by its ability to lower Post costs. ¤ Above is rhetorical argument. Point is that both gains should be split evenly.
  • 50. 52 Symmetry Every argument can be turned around
  • 51. 53 Cost Savings ¤ Gazette has better know how => gets to keep full $1m savings
  • 52. 54 Cost Savings ¤ Gazette has better know how => gets to keep full $1m savings ¤ Post brings to the table worse costs. If costs were lower, less savings to be had.
  • 53. 55 Macro Perspective ¤ Current values are 10m and 22m. ¤ New joint value is 41.85m ¤ Create 9.85m ¤ Split gain evenly ¤ Gazette pays 10 + 4.925 = 14.925m ¤ If Post walks away, 9.85m is lost
  • 54. 56 TCC and HT ¤ Coke purchasing power helped Honest reduce the cost of plastic bottle from 19¢ to 11¢. ¤ On 100 million bottles that’s worth ¤ Who should get this gain?
  • 55. 57 TCC and HT ¤ Pay market multiple on sales up to $XXm ¤ Pay 0.5 * market multiple on sales thereafter
  • 56. 58 Rio Tinto & BHP ¤ $30 billion of synergies ¤ Market caps: $160b and $250b.
  • 57. 59 Power in Negotiations ¤ Doesn’t exist! ¤ Once you define the Pie, the two are symmetric.
  • 58. 60 What Might it Mean? ¤ Token example ¤ 101 tokens. Each is worth ¤ $1 to Alice, 1¢ to Bob ¤ Does that mean Alice gets 1 and Bob gets 100 – so that they both end up with $1
  • 59. 61 What Might it Mean? ¤ Token example ¤ 101 tokens. Each is worth $1 to Alice, 1¢ to Bob ¤ No. Alice is then giving up $100 while Bob is giving up 1¢. Why look at equality in payoff versus sacrifice?
  • 60. 69 Physician Group Purchase ¤ One buyer (Hospital) ¤ Two physician groups ¤ V(0) = 0 no deal ¤ V(1) = 100 buy one group ¤ V(2) = 120 buy both ¤ If doctors merge, then 120 or 0 ¤ H gets 60; doctors get 60 (30 to each)
  • 61. Zincit ¤ New drug for Acid Reflux. ¤ Zums has offered $20m. They plan to use drug as dietary supplement so no FDA approval required. This is their best offer. ¤ Zincit will apply for FDA approval. If approved, will earn profits of $120m. If not, then will make $20m. ¤ Seller thinks chance of approval is 60%. ¤ Buyer thinks it is 10%.
  • 62. What is the Pie? First cut: Increasing profit from 20m to 120m in event of approval So it is $100m. Split it: 50m to each Simple deal: Pay $20m upfront + 50% of profits above $20m Probabilities are irrelevant
  • 63. More Pie? To maximize the pie, seller should get $100m bonus if FDA approval. Worth $60m to seller and costs buyer $10m. Best case for Seller / worst for Buyer: $15m upfront + $100m bonus Worst case for Seller / best for Buyer: –$10m signing + $100m bonus Midpoint: $2.5 upfront + $100m FDA bonus
  • 64. 73 What is the Pie? Two levels Level 1: Buy company and create chance of getting extra $100m That suggests $20m upfront + $50m bonus Level 2: Trade upfront for more bonus