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International Economics
       Lecture 3

      Trade-offs,
Comparative Advantage,
and the Market System
Yabut
Intent

Result
Fell
    Pushed
    Jumped

Result the same
Slope
Percentage Change
   Relationships
 Cause and Effect
      Areas
Notation
%	

 	

 Percent
        Change

%       Percentage Change
%   Percentage Change
    New - Old
        Old
%     Percentage Change
      New - Old
          Old

7-5
 5
%       Percentage Change
        New - Old
            Old

7-5 =
 5
%    Percentage Change
     New - Old
         Old

7-5 = 2
 5    5
%    Percentage Change
     New - Old
         Old

7-5 = 2 =
 5    5
%      Percentage Change
       New - Old
           Old

7 - 5 = 2 = .4
  5     5
%      Percentage Change
       New - Old
           Old

7 - 5 = 2 = .4 =
  5     5
%      Percentage Change
       New - Old
           Old

7 - 5 = 2 = .4 = 40%
  5     5
Last year the price was $6.
This year the price is $9.
What is the percentage change?

New - Old
  Old
Last year the price was $6.
This year the price is $9.
What is the percentage change?

New - Old
  Old



9-6
 6
Last year the price was $6.
This year the price is $9.
What is the percentage change?

New - Old
  Old



9-6 =
 6
Last year the price was $6.
This year the price is $9.
What is the percentage change?

New - Old
  Old



9-6 = 3
 6    6
Last year the price was $6.
This year the price is $9.
What is the percentage change?

New - Old
  Old



9-6 = 3 =
 6    6
Last year the price was $6.
This year the price is $9.
What is the percentage change?

New - Old
  Old



9 - 6 = 3 = .5
  6     6
Last year the price was $6.
This year the price is $9.
What is the percentage change?

New - Old
  Old



9 - 6 = 3 = .5 =
  6     6
Last year the price was $6.
This year the price is $9.
What is the percentage change?

New - Old
  Old



9 - 6 = 3 = .5 = 50%
  6     6
Y




    X
Price
  Y




        X Quantity
$
Price
  Y




        X Quantity   Q
$




    Q
$




    Q
$




    Q
$




    Q
$




    Q
$




    Q
Opportunity Cost
Opportunity Cost

The highest valued
   alternative
Absolute Advantage
    Produce more with
    the same resources


Comparative Advantage
       Produce at a
  lower opportunity cost
David Ricardo
    (1772 - 1823)

     Principles of
   Political Economy
     and Taxation

Comparative Advantage
The basis for trade is
comparative advantage,
          not
  absolute advantage.
No Trade
        2 Hooks and 2 Fish
    10 Hours - 5 Hours per Fish
                           Total
         Adam      Eve
                           Hours
Make a
          3         2         5
Hook
Catch
          4         1         5
a Fish
 Total
          7         3        10
Hours
With Trade
        2 Hooks and 2 Fish
     8 Hours - 4 Hours Per Fish
                            Total
        Adam       Eve
                            Hours
Make a 2 hooks
                              6
Hook 6 hours
Catch           2 ļ¬sh
                              2
a Fish         2 hours
 Total
          6       2           8
Hours
Saudi   Idaho
Saudi Arabia                   Idaho
  Dates     Potatoes       Dates      Potatoes
    24         0             6             0
    20         1             5             5
    16         2             4             10
    12         3             3             15
    8          4             2             20
    4          5             1             25
    0          6             0             30
       Ratios                  Ratios
       24 to 6                 6 to 30
4 Dates for 1 Potato    1/5 Dates for 1 Potato
       6 to 24                 30 to 6
1/4 Potato for 1 Date   5 Potatoes for 1 Date
Dates
                            Should Idaho and Saudi Trade?
    27

    24


    21

    18

    15

    12


        9

        6


        3

        0
            0   3   6   9      12   15    18   21   24      27   30   Potatoes
Dates
                            Should Idaho and Saudi Trade?
    27
                             Dates     Potatoes
    24                        24          0
                              20          1

    21                        16          2
                              12          3
                              8           4
    18
                              4           5
                              0           6
    15

    12


        9

        6


        3

        0
            0   3   6   9         12    15        18   21   24   27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27
                                 Dates     Potatoes
    24                            24          0
                                  20          1

    21                            16          2
                                  12          3
                                  8           4
    18
                                  4           5
                                  0           6
    15              Saudi
                     PPF
    12


        9

        6


        3

        0
            0   3    6      9         12    15        18   21   24   27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27
                                 Dates     Potatoes
    24                            24          0
                                  20          1

    21                            16          2
                                  12          3
                                  8           4
    18
                                  4           5
                                  0           6
    15              Saudi
                     PPF
    12                                                           Dates        Potatoes
                                                                     6           0
                                                                     5           5
        9
                                                                     4          10
                                                                     3          15
        6
                                                                     2          20
                                                                     1          25
        3                                                            0          30


        0
            0   3    6      9         12    15        18   21   24       27          30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27
                                 Dates     Potatoes
    24                            24          0
                                  20          1

    21                            16          2
                                  12          3
                                  8           4
    18
                                  4           5
                                  0           6
    15              Saudi
                     PPF
    12                                                              Dates        Potatoes
                                                                        6           0
                                                                        5           5
        9
                                                                        4          10
                                                                        3          15
        6
                                                                        2          20
                                                      Idaho
                                                       PPF              1          25
        3                                                               0          30


        0
            0   3    6      9         12    15        18      21   24       27          30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27
                                 Dates     Potatoes
    24                            24          0
                                  20          1

    21                            16          2
                                  12          3
                                  8           4
    18
                                  4           5
                                  0           6
    15              Saudi
                     PPF
    12                                                              Dates        Potatoes
                                                                        6           0
                                                                        5           5
        9
                                                                        4          10
                                                                        3          15
        6
                                                                        2          20
                                                      Idaho
                                                       PPF              1          25
        3                                                               0          30


        0
            0   3    6      9         12    15        18      21   24       27          30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27
                                 Dates     Potatoes
    24                            24          0
                                  20          1

    21                            16          2
                                  12          3
                                  8           4
    18
                                  4           5
                                  0           6
    15              Saudi
                     PPF
    12                                                              Dates        Potatoes
                                                                        6           0
                                                                        5           5
        9
                                                                        4          10
                                                                        3          15
        6
                                                                        2          20
                                                      Idaho
                                                       PPF              1          25
        3                                                               0          30


        0
            0   3    6      9         12    15        18      21   24       27          30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27
                                 Dates     Potatoes
    24                            24          0
                                  20          1

    21                            16          2
                                  12          3
                                  8           4
    18
                                  4           5
                                  0           6
    15              Saudi
                     PPF
    12                                                              Dates        Potatoes
                                                                        6           0
                                                                        5           5
        9
                                                                        4          10
                                                                        3          15
        6
                                                                        2          20
                                                      Idaho
                                                       PPF              1          25
        3                                                               0          30


        0
            0   3    6      9         12    15        18      21   24       27          30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27
                                 Dates     Potatoes
    24                            24          0
                                  20          1

    21                            16          2
                                  12          3
                                  8           4
    18
                                  4           5
                                  0           6
    15              Saudi
                     PPF
    12                                                              Dates        Potatoes
                                                                        6           0
                                                                        5           5
        9
                                                                        4          10
                                                                        3          15
        6
                                                                        2          20
                                                      Idaho
                                                       PPF              1          25
        3                                                               0          30


        0
            0   3    6      9         12    15        18      21   24       27          30   Potatoes
Internal
             Dates      Potatoes
  Price


 Idaho     5 Potatoes   1/5 Date



 Saudi     1/4 Potato   4 Dates
Internal
             Dates      Potatoes
  Price


 Idaho     5 Potatoes   1/5 Date



 Saudi     1/4 Potato   4 Dates
Internal
             Dates      Potatoes
  Price


 Idaho     5 Potatoes   1/5 Date



 Saudi     1/4 Potato   4 Dates
No Trade   Dates   Potatoes

 Idaho       3       15


 Saudi      12        3


  Total     15       18
Specialize   Dates   Potatoes

  Idaho        0       30


  Saudi       24        0


  Total       24       30
Analysis     Dates   Potatoes

No Trade
              15       18
 Totals
Specialize
              24       30
  Totals

  Gain        +9       +12
Trade          Dates         Potatoes

  Idaho      3 to 12 = +9        15


California       12         3 to 15 = +12


  Total          24              30
Dates
                            Should Idaho and Saudi Trade?
    27

    24


    21

    18

    15

    12


        9

        6


        3

        0
            0   3   6   9      12   15    18   21   24      27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27

    24


    21

    18

    15              Saudi
                     PPF
    12


        9

        6


        3

        0
            0   3    6      9      12   15    18   21   24      27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27

    24


    21

    18

    15              Saudi
                     PPF
    12


        9

        6
                                              Idaho
                                               PPF
        3

        0
            0   3    6      9      12   15    18      21   24   27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27

    24


    21

    18

    15              Saudi
                     PPF
    12


        9

        6
                                              Idaho
                                               PPF
        3

        0
            0   3    6      9      12   15    18      21   24   27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27

    24


    21

    18

    15              Saudi
                     PPF
    12


        9

        6
                                              Idaho
                                               PPF
        3

        0
            0   3    6      9      12   15    18      21   24   27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27

    24


    21

    18

    15              Saudi                    Trade
                     PPF                      PPF
    12


        9

        6
                                                Idaho
                                                 PPF
        3

        0
            0   3    6      9      12   15      18      21   24   27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27

    24


    21

    18

    15              Saudi                    Trade
                     PPF                      PPF
    12


        9

        6
                                                Idaho
                                                 PPF
        3

        0
            0   3    6      9      12   15      18      21   24   27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27

                                                                             Idaho
    24
                                                                              gains
                                                                            9 Dates
    21

    18

    15              Saudi                    Trade
                     PPF                      PPF
    12


        9

        6
                                                Idaho
                                                 PPF
        3

        0
            0   3    6      9      12   15      18      21   24   27   30   Potatoes
Dates
                                Should Idaho and Saudi Trade?
    27

                                                                             Idaho
    24
                                                                              gains
                                                                            9 Dates
    21

    18

    15              Saudi                    Trade                          California
                     PPF                      PPF                             gains
    12                                                                         12
                                                                            potatoes
        9

        6
                                                Idaho
                                                 PPF
        3

        0
            0   3    6      9      12   15      18      21   24   27   30   Potatoes
Markets
Where Buyers and
 Sellers Trade
The Market System

         Trust
Private Property Rights
      Rule of Law
Why are some
  rich and
others poor?
310 lecture 3
310 lecture 3

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310 lecture 3

  • 1. International Economics Lecture 3 Trade-offs, Comparative Advantage, and the Market System
  • 4.
  • 5.
  • 6.
  • 7. Fell Pushed Jumped Result the same
  • 8. Slope Percentage Change Relationships Cause and Effect Areas
  • 9. Notation % Percent Change % Percentage Change
  • 10. % Percentage Change New - Old Old
  • 11. % Percentage Change New - Old Old 7-5 5
  • 12. % Percentage Change New - Old Old 7-5 = 5
  • 13. % Percentage Change New - Old Old 7-5 = 2 5 5
  • 14. % Percentage Change New - Old Old 7-5 = 2 = 5 5
  • 15. % Percentage Change New - Old Old 7 - 5 = 2 = .4 5 5
  • 16. % Percentage Change New - Old Old 7 - 5 = 2 = .4 = 5 5
  • 17. % Percentage Change New - Old Old 7 - 5 = 2 = .4 = 40% 5 5
  • 18. Last year the price was $6. This year the price is $9. What is the percentage change? New - Old Old
  • 19. Last year the price was $6. This year the price is $9. What is the percentage change? New - Old Old 9-6 6
  • 20. Last year the price was $6. This year the price is $9. What is the percentage change? New - Old Old 9-6 = 6
  • 21. Last year the price was $6. This year the price is $9. What is the percentage change? New - Old Old 9-6 = 3 6 6
  • 22. Last year the price was $6. This year the price is $9. What is the percentage change? New - Old Old 9-6 = 3 = 6 6
  • 23. Last year the price was $6. This year the price is $9. What is the percentage change? New - Old Old 9 - 6 = 3 = .5 6 6
  • 24. Last year the price was $6. This year the price is $9. What is the percentage change? New - Old Old 9 - 6 = 3 = .5 = 6 6
  • 25. Last year the price was $6. This year the price is $9. What is the percentage change? New - Old Old 9 - 6 = 3 = .5 = 50% 6 6
  • 26.
  • 27.
  • 28.
  • 29.
  • 30.
  • 31.
  • 32.
  • 33.
  • 34.
  • 35. Y X
  • 36. Price Y X Quantity
  • 37. $ Price Y X Quantity Q
  • 38. $ Q
  • 39. $ Q
  • 40. $ Q
  • 41. $ Q
  • 42. $ Q
  • 43. $ Q
  • 45. Opportunity Cost The highest valued alternative
  • 46. Absolute Advantage Produce more with the same resources Comparative Advantage Produce at a lower opportunity cost
  • 47. David Ricardo (1772 - 1823) Principles of Political Economy and Taxation Comparative Advantage
  • 48. The basis for trade is comparative advantage, not absolute advantage.
  • 49.
  • 50. No Trade 2 Hooks and 2 Fish 10 Hours - 5 Hours per Fish Total Adam Eve Hours Make a 3 2 5 Hook Catch 4 1 5 a Fish Total 7 3 10 Hours
  • 51. With Trade 2 Hooks and 2 Fish 8 Hours - 4 Hours Per Fish Total Adam Eve Hours Make a 2 hooks 6 Hook 6 hours Catch 2 ļ¬sh 2 a Fish 2 hours Total 6 2 8 Hours
  • 52. Saudi Idaho
  • 53. Saudi Arabia Idaho Dates Potatoes Dates Potatoes 24 0 6 0 20 1 5 5 16 2 4 10 12 3 3 15 8 4 2 20 4 5 1 25 0 6 0 30 Ratios Ratios 24 to 6 6 to 30 4 Dates for 1 Potato 1/5 Dates for 1 Potato 6 to 24 30 to 6 1/4 Potato for 1 Date 5 Potatoes for 1 Date
  • 54. Dates Should Idaho and Saudi Trade? 27 24 21 18 15 12 9 6 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 55. Dates Should Idaho and Saudi Trade? 27 Dates Potatoes 24 24 0 20 1 21 16 2 12 3 8 4 18 4 5 0 6 15 12 9 6 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 56. Dates Should Idaho and Saudi Trade? 27 Dates Potatoes 24 24 0 20 1 21 16 2 12 3 8 4 18 4 5 0 6 15 Saudi PPF 12 9 6 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 57. Dates Should Idaho and Saudi Trade? 27 Dates Potatoes 24 24 0 20 1 21 16 2 12 3 8 4 18 4 5 0 6 15 Saudi PPF 12 Dates Potatoes 6 0 5 5 9 4 10 3 15 6 2 20 1 25 3 0 30 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 58. Dates Should Idaho and Saudi Trade? 27 Dates Potatoes 24 24 0 20 1 21 16 2 12 3 8 4 18 4 5 0 6 15 Saudi PPF 12 Dates Potatoes 6 0 5 5 9 4 10 3 15 6 2 20 Idaho PPF 1 25 3 0 30 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 59. Dates Should Idaho and Saudi Trade? 27 Dates Potatoes 24 24 0 20 1 21 16 2 12 3 8 4 18 4 5 0 6 15 Saudi PPF 12 Dates Potatoes 6 0 5 5 9 4 10 3 15 6 2 20 Idaho PPF 1 25 3 0 30 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 60. Dates Should Idaho and Saudi Trade? 27 Dates Potatoes 24 24 0 20 1 21 16 2 12 3 8 4 18 4 5 0 6 15 Saudi PPF 12 Dates Potatoes 6 0 5 5 9 4 10 3 15 6 2 20 Idaho PPF 1 25 3 0 30 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 61. Dates Should Idaho and Saudi Trade? 27 Dates Potatoes 24 24 0 20 1 21 16 2 12 3 8 4 18 4 5 0 6 15 Saudi PPF 12 Dates Potatoes 6 0 5 5 9 4 10 3 15 6 2 20 Idaho PPF 1 25 3 0 30 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 62. Dates Should Idaho and Saudi Trade? 27 Dates Potatoes 24 24 0 20 1 21 16 2 12 3 8 4 18 4 5 0 6 15 Saudi PPF 12 Dates Potatoes 6 0 5 5 9 4 10 3 15 6 2 20 Idaho PPF 1 25 3 0 30 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 63. Internal Dates Potatoes Price Idaho 5 Potatoes 1/5 Date Saudi 1/4 Potato 4 Dates
  • 64. Internal Dates Potatoes Price Idaho 5 Potatoes 1/5 Date Saudi 1/4 Potato 4 Dates
  • 65. Internal Dates Potatoes Price Idaho 5 Potatoes 1/5 Date Saudi 1/4 Potato 4 Dates
  • 66. No Trade Dates Potatoes Idaho 3 15 Saudi 12 3 Total 15 18
  • 67. Specialize Dates Potatoes Idaho 0 30 Saudi 24 0 Total 24 30
  • 68. Analysis Dates Potatoes No Trade 15 18 Totals Specialize 24 30 Totals Gain +9 +12
  • 69. Trade Dates Potatoes Idaho 3 to 12 = +9 15 California 12 3 to 15 = +12 Total 24 30
  • 70. Dates Should Idaho and Saudi Trade? 27 24 21 18 15 12 9 6 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 71. Dates Should Idaho and Saudi Trade? 27 24 21 18 15 Saudi PPF 12 9 6 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 72. Dates Should Idaho and Saudi Trade? 27 24 21 18 15 Saudi PPF 12 9 6 Idaho PPF 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 73. Dates Should Idaho and Saudi Trade? 27 24 21 18 15 Saudi PPF 12 9 6 Idaho PPF 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 74. Dates Should Idaho and Saudi Trade? 27 24 21 18 15 Saudi PPF 12 9 6 Idaho PPF 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 75. Dates Should Idaho and Saudi Trade? 27 24 21 18 15 Saudi Trade PPF PPF 12 9 6 Idaho PPF 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 76. Dates Should Idaho and Saudi Trade? 27 24 21 18 15 Saudi Trade PPF PPF 12 9 6 Idaho PPF 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 77. Dates Should Idaho and Saudi Trade? 27 Idaho 24 gains 9 Dates 21 18 15 Saudi Trade PPF PPF 12 9 6 Idaho PPF 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 78. Dates Should Idaho and Saudi Trade? 27 Idaho 24 gains 9 Dates 21 18 15 Saudi Trade California PPF PPF gains 12 12 potatoes 9 6 Idaho PPF 3 0 0 3 6 9 12 15 18 21 24 27 30 Potatoes
  • 79. Markets Where Buyers and Sellers Trade
  • 80. The Market System Trust Private Property Rights Rule of Law
  • 81. Why are some rich and others poor?

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