------------------------------------------- UNION=0 --------------------------------------------

                     Plot of HWAGE*EX.  Legend: A = 1 obs, B = 2 obs, etc.

            HWAGE ‚
                  ‚
               30 ˆ
               29 ˆ
               28 ˆ
               27 ˆ
               26 ˆ                                  A
               25 ˆ       B            B          A A
               24 ˆ
               23 ˆ                                       A
               22 ˆ          A   A AA A    A                 A
               21 ˆ                                  AA
               20 ˆ     A               A   A     A              A
               19 ˆ           A A B
               18 ˆ         A      AA                    A A
               17 ˆ       A       A       A         A
               16 ˆ      A  A  A A   A  A
               15 ˆ            AAB   A A   A A        A        A
               14 ˆ             A  B AA   A          A           A
               13 ˆ          B BA A AA                A    B
               12 ˆ       AB  ACB AB A  A    A A     A         AB
               11 ˆ     B BA  AA ABB A  A     A  BAA AAA A   A A  A
               10 ˆ  A   A  A AB ABBA    B BBAAA AA        AA
                9 ˆ    AAA ABAAB  DAAC DB     AAB AA A   A A  A  A
                8 ˆ   B    AAAA AB AB E BB  AB                   A
                7 ˆ   ACB A AAAB BA BBC  A CAAAAA  A AA   AA                A
                6 ˆ   ACDBCDDCC AB BBAA A A    ABA BAAA    AA  A  B        A
                5 ˆ  DAECDBBBB DABCGBDAAABC  B A AA   C  A AA  A  B
                4 ˆ  BAAAE DADB ABA BCB  C   AB B A   BAA BAA AAA  A A
                3 ˆ  CBBB   AAAA   A             AA             A     A
                2 ˆ  A    A
                1 ˆ                          A
                0 ˆ
                  ‚
                  Š--ˆ---------ˆ---------ˆ---------ˆ---------ˆ---------ˆ---------ˆ--
                     0        10        20        30        40        50        60

                                                  EX

                      Plot of hourly wage with respect to education level                     

------------------------------------------- UNION=1 --------------------------------------------

                     Plot of HWAGE*EX.  Legend: A = 1 obs, B = 2 obs, etc.

       HWAGE ‚
             ‚
          30 ˆ
          29 ˆ
          28 ˆ
          27 ˆ
          26 ˆ                               A
          25 ˆ        A
          24 ˆ
          23 ˆ                                     A
          22 ˆ                                      A
          21 ˆ
          20 ˆ                    A A                  A
          19 ˆ
          18 ˆ
          17 ˆ
          16 ˆ                    A A       A                    A
          15 ˆ                                      A         A        AA
          14 ˆ                    A AA                     A                A
          13 ˆ               A   A    B  A A       A
          12 ˆ          A     A   A A    A AA   A
          11 ˆ        A          AA A   A  A      A    A                 A
          10 ˆ         A  A    A    A          B   AA         A AA  A           A
           9 ˆ         A  AB         A     AA  A      A       A                   A
           8 ˆ             A         A                        A             A
           7 ˆ            A  AC                     A           A        A A
           6 ˆ   A  A                 A                   A     A             AA
           5 ˆ   B  A                    A
           4 ˆ          A                          A                              A
           3 ˆ                                                              A
           2 ˆ
           1 ˆ
           0 ˆ
             ‚
             Š--ˆ-------------ˆ-------------ˆ-------------ˆ-------------ˆ-------------ˆ--
                0            10            20            30            40            50

                                                  EX