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observation wage female education experience 1 11.55 1 12 20 2 5 0 9 9 3 12 0 16 15 4 7 0 14 38

observation wage female education experience
1 11.55 1 12 20
2 5 0 9 9
3 12 0 16 15
4 7 0 14 38
5 21.15 1 16 19
6 6.92 1 12 4
7 10 1 12 14
8 8 1 12 32
9 15.63 0 18 7
10 18.22 1 18 5
11 20 0 20 31
12 4.35 1 12 7
13 5 0 5 31
14 8.25 0 12 14
15 15 0 12 15
16 19 1 14 26
17 18 0 14 23
18 7.07 0 16 4
19 8 0 14 16
20 25 0 14 27
21 17.3 1 12 44
22 16 1 12 38
23 5 1 12 19
24 8.25 0 12 13
25 8 1 12 14
26 13.69 1 12 20
27 19.9 0 12 26
28 22 1 12 17
29 6.5 1 12 1
30 12 1 12 19
31 13.39 0 12 34
32 36.85 0 20 21
33 27.47 0 16 25
34 6 0 12 2
35 21.54 1 18 19
36 12.43 0 12 7
37 19.7 0 12 33
38 7.5 1 12 11
39 25.95 0 18 12
40 25.95 1 16 13
41 11.53 1 18 29
42 5.5 1 12 2
43 9.62 0 12 10
44 5.25 1 12 3
45 11.5 0 12 9
46 17 0 16 30
47 11 0 12 30
48 13 1 12 29
49 7.32 0 12 2
50 5.5 0 12 6
51 11.52 0 12 33
52 15 0 12 37
53 13.5 0 12 16
54 6.75 1 11 12
55 12.5 0 12 12
56 7.1 0 9 28
57 6 0 11 35
58 14.43 0 16 9
59 13.78 1 16 2
60 5 1 12 7
61 4.49 1 10 31
62 10 0 5 42
63 5 1 12 37
64 17.68 1 16 33
65 4.38 1 12 23
66 6.88 1 12 12
67 12.5 1 12 25
68 13.9 1 16 8
69 7 0 12 41
70 12 0 11 32
71 9 0 12 15
72 6.5 0 11 6
73 16 0 12 42
74 2.13 1 12 12
75 9.62 0 12 21
76 20.2 1 18 21
77 14.43 1 20 2
78 35.83 0 20 20
79 16.67 1 14 11
80 23.08 0 18 25
81 4.25 0 14 7
82 5.5 1 12 25
83 15.59 0 12 36
84 6.94 1 14 26
85 25 1 14 30
86 5 0 12 3
87 15.68 1 16 21
88 9.53 1 12 19
89 11 0 12 7
90 4.25 1 12 0
91 4 1 12 34
92 8.25 0 12 15
93 22 0 12 15
94 5.15 1 12 1
95 4.7 0 16 1
96 8 0 1 26
97 12 0 11 32
98 2 1 5 14
99 5 0 9 12
100 7 0 12 3
101 12 0 5 30
102 17.49 0 12 14
103 6.75 0 10 9
104 6.5 1 14 5
105 4.5 1 1 26
106 8.65 1 16 18
107 10 0 9 8
108 5.5 1 1 20
109 7.5 0 12 2
110 3.57 1 16 1
111 18.25 1 16 21
112 16 0 14 26
113 25 0 18 33
114 12 1 12 41
115 15.35 1 12 22
116 16.67 1 12 28
117 6.25 0 12 38
118 4.25 1 12 37
119 17.3 0 16 15
120 20.83 0 12 38
121 18.46 0 16 30
122 10 0 10 2
123 11.55 0 12 15
124 11 1 14 7
125 15.89 1 16 24
126 23.08 0 16 14
127 4.25 1 5 22
128 5 0 7 7
129 17.45 1 12 23
130 12.82 1 16 25
131 6.8 0 12 2
132 4.25 1 10 5
133 8.65 1 12 38
134 8 1 12 36
135 13.25 1 14 25
136 6.75 0 12 17
137 5.5 1 1 24
138 7.5 0 12 19
139 9.25 1 16 21
140 29.12 0 16 22
141 24.75 0 16 19
142 8.96 1 12 41
143 8 0 12 6
144 7 1 12 1
145 17.3 1 16 37
146 12.03 0 12 10
147 9 0 16 4
148 5.5 0 12 0
149 4.45 1 11 1
150 6.06 1 12 1
151 21.63 0 16 12
152 5.83 0 12 2
153 43.25 0 18 13
154 37.5 0 12 22
155 8.19 0 12 13
156 21.63 0 16 12
157 6 1 12 17
158 9.75 1 16 7
159 8.65 1 16 10
160 7 1 12 24
161 6 0 7 24
162 10 1 12 7
163 12.5 1 12 13
164 25.48 1 18 30
165 5 1 12 4
166 14.43 1 16 5
167 24.47 1 16 33
168 28.85 0 20 23
169 42.73 0 20 13
170 7 0 16 15
171 9 1 16 23
172 7 0 12 3
173 18 0 12 22
174 18 0 12 22
175 13.55 1 16 24
176 9.3 1 12 20
177 14.24 0 16 17
178 18 1 18 9
179 9.09 1 12 16
180 17.64 1 12 13
181 11.53 1 16 14
182 19.15 0 14 11
183 12.2 1 12 15
184 14.44 0 12 7
185 15 1 16 29
186 9.54 1 12 27
187 17.45 0 12 23
188 24 1 14 16
189 14.43 0 18 8
190 16.35 0 16 8
191 5 1 12 6
192 18.7 1 16 11
193 8 0 12 47
194 18.75 0 12 16
195 5.5 1 12 1
196 4.92 1 12 40
197 7 1 16 1
198 4.5 0 12 4
199 8.2 1 12 33
200 17.25 0 12 27
Source: Gyjarati - Econometrics by Exmaple

The file contains data on 200 workers. For each, it contains the following information:

  • Wage per hour.
  • A dummy variable that takes the value 1 if the person is a female, and 0 otherwise.
  • Years of education.
  • Years of experience.

Researchers are interested in estimating the effect of gender, years of education, and years of experience on the wage per hour.

First, construct two variables:

1. A simple dummy variable called "experienced_worker" that take the value 1 if the worker has15 or moreyears of experience, and 0 if the worker has14 or lessyears of education.

2. A variable that is the interaction offemaleandexperienced_worker(i.e.femaleXexperienced_worker).

Then, estimate the following regression:

Notice that you use the newexperienced_workervariable in the regression and not the originalexperiencevariable.

  1. What is the estimated regression equation?
  2. Interpret the estimated coefficient onfemale. Be precise.
  3. Interpret the estimated coefficient onyears of education. Be precise.
  4. What is the predicted wage of a male with 12 years of education and 20 years of experience?
  5. Which of the 4 Xs affect wages? Hint: which of the 4 coefficients are statistically significant?
  6. What is the predicted wage equation for anon-experienced female worker?
  7. What is the predicted wage equation for an experienced female worker?
  8. What is the effect on wage of being an experienced worker (compared to non-experienced) for females? Hint: use the parts f and g.
  9. What is the effect on wage of being an experienced worker (compared to non-experienced) for males? Hint: repeat parts f and g for males.
  10. Is the effect of being an experienced worker on wage different for females and males? Hint: examine the statistical significance of a certain coefficient/s.
  11. Does the model allow the effect ofyears of educationon wage to be different for females and males? Does it make sense?

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