nested regression in stata

1:07

1:24

7:07

6:21

3:42

7:05

1:04

2:25

11:54

1:17

5:13

12:09

1:12

1:13

16:29

9:13

26:55

14:08

21:09

53:40

5:18

28:27

11:31

1:28

4:25

4:09

16:05

5:37

16:40

12:57

11:06

8:10

9:37

کوتاه

5:36

7:30

9:02

4:50

14:43

10:57