itsp

```
age
variable:group
```

Variable Graph Type N Descriptives Label

[+] age
@census2.dta

category
(float)

50
(9)

"24", "26", "27", "28", "29", "30..31", "32", "35"

All properties
key	content
N	50
N_unique	9
class	category
freq	1, 1, 3, 6, 12, 18, 3, 5, 1
max	35.000
mean	29.500
min	24.000
names	"24", "26", "27", "28", "29", "30", "31", "32", "35"
sd	1.753
type	float
values	24, 26, 27, 28, 29, 30, 31, 32, 35

file # command

ch2.0.do:

19 [+]

label var medage "Median age, years"

Script Output


age:                                            Number of Observations
------                                      ------------------------------
                                            Total   Integers   Nonintegers
|          #                 Negative           -         -          -
|          #                 Zero               -         -          -
|          #                 Positive          50        50          -
|          #                                -----     -----      -----
|          #                 Total             50        50          -
|  .   #   #   #   .         Missing            -
+----------------------                     -----
24                   35                        50
   (9 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
         age |        50        29.5    1.752549         24         35
@mean    29.500
@sd     1.753
@min    24.000
@max    35.000
@values 24, 26, 27, 28, 29, 30, 31, 32, 35
@names "24", "26", "27", "28", "29", "30", "31", "32", "35"
@freq 1, 1, 3, 6, 12, 18, 3, 5, 1
@type float
@label 
@class category
@N_unique 9
@N 50

[+] age
@ch45.dta

category
(float)

14
(12)

"3", "7", "9", "10", "11", "12", ..39", "42", "45"

All properties
key	content
N	14
N_unique	12
class	category
freq	1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1
max	45.000
mean	21.000
min	3.000
names	"3", "7", "9", "10", "11", "12", "14", "16", "36", "39", "42", "45"
sd	14.884
type	float
values	3, 7, 9, 10, 11, 12, 14, 16, 36, 39, 42, 45

file # command

ch4.4.do:

29 [+]

list fam person female age , sepby(fam) noobs

48 [+]

list fam female age nadult sibs nboys nbros older oldestsibling , sepby(fam) noobs

file # command

ch4.4.do:

33 [+]

by fam: egen nadult = total(age >= 18)

34 [+]

by fam: egen nchild = total(age <= 17) if age <= 17

36 [+]

by fam: egen nboys = total(age <= 17 & !female) if age <= 17

38 [+]

by fam: egen nbros = total(age <= 17 & !female) if age <= 17

39 [+]

replace nbros = nbros - (age <= 17 & !female)

43 [+]

by fam: g older = (age <= 17 & age[_n+1] <= 17) * (age < age[_n+1])

45 [+]

by fam: egen oldestchild = max(age) if age<=17

46 [+]

g oldestsibling = cond(age < oldestchild & age <= 17, oldestchild, .)

Script Output


age:                                            Number of Observations
------                                      ------------------------------
                                            Total   Integers   Nonintegers
|  #                         Negative           -         -          -
|  #                         Zero               -         -          -
|  #   #                     Positive          14        14          -
|  #   #           #                        -----     -----      -----
|  #   #       #   #         Total             14        14          -
|  #   #   .   #   #         Missing            -
+----------------------                     -----
3                    45                        14
  (12 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
         age |        14          21    14.88417          3         45
@mean    21.000
@sd    14.884
@min     3.000
@max    45.000
@values 3, 7, 9, 10, 11, 12, 14, 16, 36, 39, 42, 45
@names "3", "7", "9", "10", "11", "12", "14", "16", "36", "39", "42", "45"
@freq 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1
@type float
@label 
@class category
@N_unique 12
@N 14

[+] age
@fem2.dta

category
(byte)

118
(18)

"29", "30", "31", "32", "33", "34..44", "45", "46"

AGE

All properties
key	content
N	118
N_unique	18
class	category
freq	2, 3, 10, 13, 5, 8, 9, 3, 4, 1, 10, 4, 16, 12, 8, 6, 2, 2
label	AGE
max	46
mean	37.458
min	29
names	"29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46"
sd	4.742
type	byte
values	29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46

file # command

ch3.10.do:

69 [+]

regress weight age age2

79 [+]

quietly regress weight age age2

file # command

ch3.10.do:

54 [+]

generate double rootage = age * root2

68 [+]

generate age2 = age^2

Script Output


age:  AGE                                       Number of Observations
---------                                   ------------------------------
                                            Total   Integers   Nonintegers
|              #             Negative           -         -          -
|  #           #             Zero               -         -          -
|  #   #       #             Positive         118       118          -
|  #   #   #   #   #                        -----     -----      -----
|  #   #   #   #   #         Total            118       118          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
29                   46                       118
  (18 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
         age |       118    37.45763    4.742325         29         46
@mean    37.458
@sd     4.742
@min        29
@max        46
@values 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46
@names "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46"
@freq 2, 3, 10, 13, 5, 8, 9, 3, 4, 1, 10, 4, 16, 12, 8, 6, 2, 2
@type byte
@label AGE
@class category
@N_unique 18
@N 118

[+] age
@griliches76.dta

category
(float)

758
(15)

"16", "17", "18", "19", "20", "21..28", "29", "30"

All properties
key	content
N	758
N_unique	15
class	category
freq	3, 43, 72, 67, 73, 97, 109, 84, 85, 29, 37, 26, 15, 13, 5
max	30.000
mean	21.835
min	16.000
names	"16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30"
sd	2.982
type	float
values	16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30

file # command

ch14.9.do:

37 [+]

quietly ivreg2 lw s expr tenure rns smsa (iq=med kww age mrt) , gmm2s

44 [+]

quietly ivreg2 lw s expr tenure rns smsa (iq=med kww age mrt) , gmm2s robust

56 [+]

quietly ivreg2 lw s expr tenure rns smsa (iq=med kww age mrt) , cue

63 [+]

quietly ivreg2 lw s expr tenure rns smsa (iq=med kww age mrt) , cue robust

Data Manipulations with age
file	#	command

Script Output


age:                                            Number of Observations
------                                      ------------------------------
                                            Total   Integers   Nonintegers
|          #                 Negative           -         -          -
|      #   #                 Zero               -         -          -
|      #   #                 Positive         758       758          -
|      #   #                                -----     -----      -----
|  #   #   #                 Total            758       758          -
|  #   #   #   #   .         Missing            -
+----------------------                     -----
16                   30                       758
  (15 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
         age |       758    21.83509    2.981756         16         30
@mean    21.835
@sd     2.982
@min    16.000
@max    30.000
@values 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30
@names "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30"
@freq 3, 43, 72, 67, 73, 97, 109, 84, 85, 29, 37, 26, 15, 13, 5
@type float
@label 
@class category
@N_unique 15
@N 758

[+] age
@litgov_est.dta

other
(byte)

2897
(59)

(x̄=57.878, 9.010) [27,93]

director age

All properties
key	content
N	2897
N_unique	59
class	other
example0	61
histh	.00017782, .00035564, .00213387, .00177822, .00408992, .00622378, .0119141, .01475926, .01867135, .01973829, .02845159, .03058545, .0412548, .04001004, .0444556, .0222278, .04107698, .04267738, .03894311, .03040763, .02969634, .01938264, .01084717, .00746854, .00213387, .00231169, .0016004, .00053347, .00053347, .00017782, .00017782, .00017782, .00017782
histw	27.970589, 31.852942, 33.794117, 35.735294, 37.676472, 39.617645, 41.558823, 43.5, 45.441177, 47.382355, 49.323528, 51.264706, 53.205883, 55.14706, 57.088234, 59.029411, 60.970589, 62.911766, 64.852943, 66.794121, 68.735291, 70.676468, 72.617645, 74.558823, 76.5, 78.441177, 80.382355, 82.323532, 84.264709, 86.205879, 88.147057, 90.088234, 92.029411
label	director age
max	93
mean	57.878
min	27
sd	9.010
type	byte

Data Manipulations with age
file	#	command

Script Output


age:  director age                              Number of Observations
------------------                          ------------------------------
                                            Total   Integers   Nonintegers
|          #                 Negative           -         -          -
|          #                 Zero               -         -          -
|          #                 Positive        2897      2897          -
|      #   #                                -----     -----      -----
|      #   #                 Total           2897      2897          -
|  .   #   #   #   .         Missing            -
+----------------------                     -----
27                   93                      2897
  (59 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
         age |      2897    57.87849    9.009649         27         93
@mean    57.878
@sd     9.010
@min        27
@max        93
@example0 61
@histh .00017782, .00035564, .00213387, .00177822, .00408992, .00622378, .0119141, .01475926, .01867135, .01973829, .02845159, .03058545, .0412548, .04001004, .0444556, .0222278, .04107698, .04267738, .03894311, .03040763, .02969634, .01938264, .01084717, .00746854, .00213387, .00231169, .0016004, .00053347, .00053347, .00017782, .00017782, .00017782, .00017782
@histw 27.970589, 31.852942, 33.794117, 35.735294, 37.676472, 39.617645, 41.558823, 43.5, 45.441177, 47.382355, 49.323528, 51.264706, 53.205883, 55.14706, 57.088234, 59.029411, 60.970589, 62.911766, 64.852943, 66.794121, 68.735291, 70.676468, 72.617645, 74.558823, 76.5, 78.441177, 80.382355, 82.323532, 84.264709, 86.205879, 88.147057, 90.088234, 92.029411
@type byte
@label director age
@class other
@N_unique 59
@N 2897

[+] age
@litgov_estsample.dta

other
(byte)

2720
(59)

(x̄=57.989, 8.946) [27,93]

director age

All properties
key	content
N	2720
N_unique	59
class	other
example0	61
histh	.00018939, .00037879, .00227273, .00189394, .00378788, .00587121, .01079545, .01439394, .01856061, .01969697, .0282197, .03011364, .0405303, .04034091, .04375, .02253788, .0407197, .04431818, .0407197, .03049242, .03011364, .02026515, .01060606, .00757576, .00170455, .00227273, .00132576, .00056818, .00037879, .00018939, .00018939, .00018939, .00018939
histw	27.970589, 31.852942, 33.794117, 35.735294, 37.676472, 39.617645, 41.558823, 43.5, 45.441177, 47.382355, 49.323528, 51.264706, 53.205883, 55.14706, 57.088234, 59.029411, 60.970589, 62.911766, 64.852943, 66.794121, 68.735291, 70.676468, 72.617645, 74.558823, 76.5, 78.441177, 80.382355, 82.323532, 84.264709, 86.205879, 88.147057, 90.088234, 92.029411
label	director age
max	93
mean	57.989
min	27
sd	8.946
type	byte

Data Manipulations with age
file	#	command

Script Output


age:  director age                              Number of Observations
------------------                          ------------------------------
                                            Total   Integers   Nonintegers
|          #                 Negative           -         -          -
|          #                 Zero               -         -          -
|          #                 Positive        2720      2720          -
|      #   #                                -----     -----      -----
|      #   #                 Total           2720      2720          -
|  .   #   #   #   .         Missing            -
+----------------------                     -----
27                   93                      2720
  (59 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
         age |      2720     57.9886    8.945642         27         93
@mean    57.989
@sd     8.946
@min        27
@max        93
@example0 61
@histh .00018939, .00037879, .00227273, .00189394, .00378788, .00587121, .01079545, .01439394, .01856061, .01969697, .0282197, .03011364, .0405303, .04034091, .04375, .02253788, .0407197, .04431818, .0407197, .03049242, .03011364, .02026515, .01060606, .00757576, .00170455, .00227273, .00132576, .00056818, .00037879, .00018939, .00018939, .00018939, .00018939
@histw 27.970589, 31.852942, 33.794117, 35.735294, 37.676472, 39.617645, 41.558823, 43.5, 45.441177, 47.382355, 49.323528, 51.264706, 53.205883, 55.14706, 57.088234, 59.029411, 60.970589, 62.911766, 64.852943, 66.794121, 68.735291, 70.676468, 72.617645, 74.558823, 76.5, 78.441177, 80.382355, 82.323532, 84.264709, 86.205879, 88.147057, 90.088234, 92.029411
@type byte
@label director age
@class other
@N_unique 59
@N 2720

[+] age
@unionT.dta

other
(byte)

26200
(31)

(x̄=30.432, 6.489) [16,46]

age in current year

All properties
key	content
N	26200
N_unique	31
class	other
example0	20
histh	.00022392, .00184733, .016514, .03286005, .041257, .04651909, .0503257, .06157761, .07165395, .07120611, .07120611, .06695165, .06488041, .0693028, .06611196, .06885497, .06818321, .07853944, .0750687, .07977099, .07137404, .06062596, .05564377, .04870229, .03773028, .03230026, .0217201, .01808142, .01270738, .00481425, .00011196
histw	16.34091, 17.022728, 17.704546, 19.068182, 19.75, 21.113636, 21.795454, 23.15909, 23.84091, 25.204546, 25.886364, 27.25, 27.931818, 29.295454, 29.977272, 31.34091, 32.022728, 32.704544, 34.06818, 34.75, 36.113636, 36.795456, 38.159092, 38.840908, 40.204544, 40.886364, 42.25, 42.93182, 44.295456, 44.977272, 45.659092
label	age in current year
max	46
mean	30.432
min	16
sd	6.489
type	byte

file # command

ch5.01.do:

20 [+]

ttest age , by(union)

Data Manipulations with age
file	#	command

Script Output


age:  age in current year                       Number of Observations
-------------------------                   ------------------------------
                                            Total   Integers   Nonintegers
|          #                 Negative           -         -          -
|      #   #   #             Zero               -         -          -
|      #   #   #             Positive       26200     26200          -
|      #   #   #                            -----     -----      -----
|  #   #   #   #             Total          26200     26200          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
16                   46                     26200
  (31 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
         age |     26200    30.43221    6.489056         16         46
@mean    30.432
@sd     6.489
@min        16
@max        46
@example0 20
@histh .00022392, .00184733, .016514, .03286005, .041257, .04651909, .0503257, .06157761, .07165395, .07120611, .07120611, .06695165, .06488041, .0693028, .06611196, .06885497, .06818321, .07853944, .0750687, .07977099, .07137404, .06062596, .05564377, .04870229, .03773028, .03230026, .0217201, .01808142, .01270738, .00481425, .00011196
@histw 16.34091, 17.022728, 17.704546, 19.068182, 19.75, 21.113636, 21.795454, 23.15909, 23.84091, 25.204546, 25.886364, 27.25, 27.931818, 29.295454, 29.977272, 31.34091, 32.022728, 32.704544, 34.06818, 34.75, 36.113636, 36.795456, 38.159092, 38.840908, 40.204544, 40.886364, 42.25, 42.93182, 44.295456, 44.977272, 45.659092
@type byte
@label age in current year
@class other
@N_unique 31
@N 26200