itsp

```
year
variable:group
```

Variable Graph Type N Descriptives Label

[+] year
@NEstates.dta

identifier
(int)

20
(20)

All properties
key	content
N	20
N_unique	20
class	identifier
example0	1981
histh	.05263158, .05263158, .05263158, .05263158
histw	1983.375, 1988.125, 1992.875, 1997.625
max	2000
mean	1990.500
min	1981
sd	5.916
type	int

file # command

ch5.01.do:

81 [+]

keep if inlist(year,1990,1995,2000)

83 [+]

keep year popCT popMA popRI

96 [+]

reshape long pop , i(state) j(year)

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|  #   #   #   #   #         Negative           -         -          -
|  #   #   #   #   #         Zero               -         -          -
|  #   #   #   #   #         Positive          20        20          -
|  #   #   #   #   #                        -----     -----      -----
|  #   #   #   #   #         Total             20        20          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1981               2000                        20
  (20 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |        20      1990.5     5.91608       1981       2000
@mean  1990.500
@sd     5.916
@min      1981
@max      2000
@example0 1981
@histh .05263158, .05263158, .05263158, .05263158
@histw 1983.375, 1988.125, 1992.875, 1997.625
@type int
@label 
@class identifier
@N_unique 20
@N 20

[+] year
@cb5a.dta

category
(int)

5
(4)

"2001", "2002", "2003", "2005"

All properties
key	content
N	5
N_unique	4
class	category
freq	1, 1, 1, 2
max	2005
mean	2003.200
min	2001
names	"2001", "2002", "2003", "2005"
sd	1.789
type	int
values	2001, 2002, 2003, 2005

file # command

cb5a.do:

11 [+]

egen rowid = concat(state year)

23 [+]

generate rowid = state + string(year)

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|              #             Negative           -         -          -
|              #             Zero               -         -          -
|              #             Positive           5         5          -
|  #   #   #   #                            -----     -----      -----
|  #   #   #   #             Total              5         5          -
|  #   #   #   #             Missing            -
+----------------------                     -----
2001               2005                         5
   (4 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |         5      2003.2    1.788854       2001       2005
@mean  2003.200
@sd     1.789
@min      2001
@max      2005
@values 2001, 2002, 2003, 2005
@names "2001", "2002", "2003", "2005"
@freq 1, 1, 1, 2
@type int
@label 
@class category
@N_unique 4
@N 5

[+] year
@cb5along.dta

category
(int)

15
(4)

"2001", "2002", "2003", "2005"

All properties
key	content
N	15
N_unique	4
class	category
freq	3, 3, 3, 6
max	2005
mean	2003.200
min	2001
names	"2001", "2002", "2003", "2005"
sd	1.656
type	int
values	2001, 2002, 2003, 2005

file # command

cb5a.do:

11 [+]

egen rowid = concat(state year)

23 [+]

generate rowid = state + string(year)

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|              #             Negative           -         -          -
|              #             Zero               -         -          -
|              #             Positive          15        15          -
|  #   #   #   #                            -----     -----      -----
|  #   #   #   #             Total             15        15          -
|  #   #   #   #             Missing            -
+----------------------                     -----
2001               2005                        15
   (4 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |        15      2003.2    1.656157       2001       2005
@mean  2003.200
@sd     1.656
@min      2001
@max      2005
@values 2001, 2002, 2003, 2005
@names "2001", "2002", "2003", "2005"
@freq 3, 3, 3, 6
@type int
@label 
@class category
@N_unique 4
@N 15

[+] year
@ex_employee.dta

identifier
(float)

20
(20)

All properties
key	content
N	20
N_unique	20
class	identifier
example0	1987
histh	.05263158, .05263158, .05263158, .05263158
histw	1989.375, 1994.125, 1998.875, 2003.625
max	2006.000
mean	1996.500
min	1987.000
sd	5.916
type	float

file # command

ch4.4.do:

21 [+]

list year employer length longspell , sepby(employer) noobs

Data Manipulations with year
file	#	command

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|  #   #   #   #   #         Negative           -         -          -
|  #   #   #   #   #         Zero               -         -          -
|  #   #   #   #   #         Positive          20        20          -
|  #   #   #   #   #                        -----     -----      -----
|  #   #   #   #   #         Total             20        20          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1987               2006                        20
  (20 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |        20      1996.5     5.91608       1987       2006
@mean  1996.500
@sd     5.916
@min  1987.000
@max  2006.000
@example0 1987
@histh .05263158, .05263158, .05263158, .05263158
@histw 1989.375, 1994.125, 1998.875, 2003.625
@type float
@label 
@class identifier
@N_unique 20
@N 20

[+] year
@griliches76.dta

category
(float)

758
(7)

"66", "67", "68", "69", "70", "71", "73"

All properties
key	content
N	758
N_unique	7
class	category
freq	217, 63, 79, 85, 64, 92, 158
max	73.000
mean	69.032
min	66.000
names	"66", "67", "68", "69", "70", "71", "73"
sd	2.632
type	float
values	66, 67, 68, 69, 70, 71, 73

Data Manipulations with year
file	#	command

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|  #                         Negative           -         -          -
|  #                         Zero               -         -          -
|  #                         Positive         758       758          -
|  #       #       #                        -----     -----      -----
|  #       #       #         Total            758       758          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
66                   73                       758
   (7 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |       758    69.03166    2.631794         66         73
@mean    69.032
@sd     2.632
@min    66.000
@max    73.000
@values 66, 67, 68, 69, 70, 71, 73
@names "66", "67", "68", "69", "70", "71", "73"
@freq 217, 63, 79, 85, 64, 92, 158
@type float
@label 
@class category
@N_unique 7
@N 758

[+] year
@grun1.dta

category
(float)

172
(20)

"1935", "1936", "1937", "1938", ".. "1953", "1954"

All properties
key	content
N	172
N_unique	20
class	category
freq	8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9
max	1954.000
mean	1944.779
min	1935.000
names	"1935", "1936", "1937", "1938", "1939", "1940", "1941", "1942", "1943", "1944", "1945", "1946", "1947", "1948", "1949", "1950", "1951", "1952", "1953", "1954"
sd	5.744
type	float
values	1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954

Data Manipulations with year
file	#	command

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|          #   #   #         Negative           -         -          -
|  #   #   #   #   #         Zero               -         -          -
|  #   #   #   #   #         Positive         172       172          -
|  #   #   #   #   #                        -----     -----      -----
|  #   #   #   #   #         Total            172       172          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1935               1954                       172
  (20 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |       172    1944.779    5.743852       1935       1954
@mean  1944.779
@sd     5.744
@min  1935.000
@max  1954.000
@values 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954
@names "1935", "1936", "1937", "1938", "1939", "1940", "1941", "1942", "1943", "1944", "1945", "1946", "1947", "1948", "1949", "1950", "1951", "1952", "1953", "1954"
@freq 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9
@type float
@label 
@class category
@N_unique 20
@N 172

[+] year
@grunfeld.dta

category
(float)

200
(20)

"1935", "1936", "1937", "1938", ".. "1953", "1954"

All properties
key	content
N	200
N_unique	20
class	category
freq	10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
max	1954.000
mean	1944.500
min	1935.000
names	"1935", "1936", "1937", "1938", "1939", "1940", "1941", "1942", "1943", "1944", "1945", "1946", "1947", "1948", "1949", "1950", "1951", "1952", "1953", "1954"
sd	5.781
type	float
values	1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954

file # command

ch8.2.do:

55 [+]

tsline invrate if inrange(company, 1, 4) & year >= 1937 , by(company, ti(" ")) /// yline(0) ysc(range(-0.2 0.3)) ytick(-0.2(0.1)0.3) ylab(-0.2(0.1)0.3) /// scheme(s2mono)

ch14.8.do:

143 [+]

list year invest* , sep(0)

file # command

ch8.2.do:

54 [+]

label var invrate "Three-year average investment rate"

ch14.8.do:

142 [+]

reshape wide invest mvalue kstock , i(year) j(company)

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|  #   #   #   #   #         Negative           -         -          -
|  #   #   #   #   #         Zero               -         -          -
|  #   #   #   #   #         Positive         200       200          -
|  #   #   #   #   #                        -----     -----      -----
|  #   #   #   #   #         Total            200       200          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1935               1954                       200
  (20 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |       200      1944.5    5.780751       1935       1954
@mean  1944.500
@sd     5.781
@min  1935.000
@max  1954.000
@values 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954
@names "1935", "1936", "1937", "1938", "1939", "1940", "1941", "1942", "1943", "1944", "1945", "1946", "1947", "1948", "1949", "1950", "1951", "1952", "1953", "1954"
@freq 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
@type float
@label 
@class category
@N_unique 20
@N 200

[+] year
@grunfeldavg.dta

category
(float)

200
(20)

"1935", "1936", "1937", "1938", ".. "1953", "1954"

All properties
key	content
N	200
N_unique	20
class	category
freq	10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
max	1954.000
mean	1944.500
min	1935.000
names	"1935", "1936", "1937", "1938", "1939", "1940", "1941", "1942", "1943", "1944", "1945", "1946", "1947", "1948", "1949", "1950", "1951", "1952", "1953", "1954"
sd	5.781
type	float
values	1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954

file # command

ch8.2.do:

55 [+]

tsline invrate if inrange(company, 1, 4) & year >= 1937 , by(company, ti(" ")) /// yline(0) ysc(range(-0.2 0.3)) ytick(-0.2(0.1)0.3) ylab(-0.2(0.1)0.3) /// scheme(s2mono)

ch14.8.do:

143 [+]

list year invest* , sep(0)

file # command

ch8.2.do:

54 [+]

label var invrate "Three-year average investment rate"

ch14.8.do:

142 [+]

reshape wide invest mvalue kstock , i(year) j(company)

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|  #   #   #   #   #         Negative           -         -          -
|  #   #   #   #   #         Zero               -         -          -
|  #   #   #   #   #         Positive         200       200          -
|  #   #   #   #   #                        -----     -----      -----
|  #   #   #   #   #         Total            200       200          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1935               1954                       200
  (20 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |       200      1944.5    5.780751       1935       1954
@mean  1944.500
@sd     5.781
@min  1935.000
@max  1954.000
@values 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954
@names "1935", "1936", "1937", "1938", "1939", "1940", "1941", "1942", "1943", "1944", "1945", "1946", "1947", "1948", "1949", "1950", "1951", "1952", "1953", "1954"
@freq 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
@type float
@label 
@class category
@N_unique 20
@N 200

[+] year
@ldinvest.dta

category
(float)

160
(16)

"1939", "1940", "1941", "1942", ".. "1953", "1954"

All properties
key	content
N	160
N_unique	16
class	category
freq	10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
max	1954.000
mean	1946.500
min	1939.000
names	"1939", "1940", "1941", "1942", "1943", "1944", "1945", "1946", "1947", "1948", "1949", "1950", "1951", "1952", "1953", "1954"
sd	4.624
type	float
values	1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954

file # command

ch8.2.do:

25 [+]

levelsof year , local(yrlist)

55 [+]

tsline invrate if inrange(company, 1, 4) & year >= 1937 , by(company, ti(" ")) /// yline(0) ysc(range(-0.2 0.3)) ytick(-0.2(0.1)0.3) ylab(-0.2(0.1)0.3) /// scheme(s2mono)

file # command

ch8.2.do:

29 [+]

reshape wide expp avgsal math4sat math7sat , i(distid) j(year)

40 [+]

reshape long expp avgsal math4sat math7sat , i(distid) j(year)

54 [+]

label var invrate "Three-year average investment rate"

73 [+]

rename end year

75 [+]

keep if year >= 1939

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|                  #         Negative           -         -          -
|                  #         Zero               -         -          -
|  #   #   #   #   #         Positive         160       160          -
|  #   #   #   #   #                        -----     -----      -----
|  #   #   #   #   #         Total            160       160          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1939               1954                       160
  (16 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |       160      1946.5    4.624246       1939       1954
@mean  1946.500
@sd     4.624
@min  1939.000
@max  1954.000
@values 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954
@names "1939", "1940", "1941", "1942", "1943", "1944", "1945", "1946", "1947", "1948", "1949", "1950", "1951", "1952", "1953", "1954"
@freq 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
@type float
@label 
@class category
@N_unique 16
@N 160

[+] year
@litgov_est.dta

category
(float)

2897
(7)

"1996", "1997", "1998", "1999", ".. "2001", "2002"

All properties
key	content
N	2897
N_unique	7
class	category
freq	163, 340, 358, 576, 447, 457, 556
max	2002.000
mean	1999.518
min	1996.000
names	"1996", "1997", "1998", "1999", "2000", "2001", "2002"
sd	1.829
type	float
values	1996, 1997, 1998, 1999, 2000, 2001, 2002

Data Manipulations with year
file	#	command

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|                  #         Negative           -         -          -
|                  #         Zero               -         -          -
|                  #         Positive        2897      2897          -
|          #       #                        -----     -----      -----
|  #   #   #   #   #         Total           2897      2897          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1996               2002                      2897
   (7 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |      2897    1999.518    1.828759       1996       2002
@mean  1999.518
@sd     1.829
@min  1996.000
@max  2002.000
@values 1996, 1997, 1998, 1999, 2000, 2001, 2002
@names "1996", "1997", "1998", "1999", "2000", "2001", "2002"
@freq 163, 340, 358, 576, 447, 457, 556
@type float
@label 
@class category
@N_unique 7
@N 2897

[+] year
@litgov_estsample.dta

category
(float)

2720
(7)

"1996", "1997", "1998", "1999", ".. "2001", "2002"

All properties
key	content
N	2720
N_unique	7
class	category
freq	129, 319, 338, 562, 408, 416, 548
max	2002.000
mean	1999.559
min	1996.000
names	"1996", "1997", "1998", "1999", "2000", "2001", "2002"
sd	1.812
type	float
values	1996, 1997, 1998, 1999, 2000, 2001, 2002

Data Manipulations with year
file	#	command

Script Output


year:                                           Number of Observations
-------                                     ------------------------------
                                            Total   Integers   Nonintegers
|                  #         Negative           -         -          -
|                  #         Zero               -         -          -
|                  #         Positive        2720      2720          -
|          #       #                        -----     -----      -----
|  #   #   #   #   #         Total           2720      2720          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1996               2002                      2720
   (7 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |      2720    1999.559    1.812107       1996       2002
@mean  1999.559
@sd     1.812
@min  1996.000
@max  2002.000
@values 1996, 1997, 1998, 1999, 2000, 2001, 2002
@names "1996", "1997", "1998", "1999", "2000", "2001", "2002"
@freq 129, 319, 338, 562, 408, 416, 548
@type float
@label 
@class category
@N_unique 7
@N 2720

[+] year
@mathpnl_long.dta

category
(int)

2200
(4)

"1992", "1994", "1996", "1998"

year

All properties
key	content
N	2200
N_unique	4
class	category
freq	550, 550, 550, 550
label	year
max	1998
mean	1995.000
min	1992
names	"1992", "1994", "1996", "1998"
sd	2.237
type	int
values	1992, 1994, 1996, 1998

file # command

ch5.01.do:

130 [+]

tabulate year

file # command

ch5.01.do:

152 [+]

keep distid year

153 [+]

keep if year == 1992

155 [+]

drop year

ch8.2.do:

16 [+]

keep distid year expp avgsal math4sat math7sat

Script Output


year:  year                                     Number of Observations
-----------                                 ------------------------------
                                            Total   Integers   Nonintegers
|  #   #   #   #             Negative           -         -          -
|  #   #   #   #             Zero               -         -          -
|  #   #   #   #             Positive        2200      2200          -
|  #   #   #   #                            -----     -----      -----
|  #   #   #   #             Total           2200      2200          -
|  #   #   #   #             Missing            -
+----------------------                     -----
1992               1998                      2200
   (4 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |      2200        1995    2.236576       1992       1998
@mean  1995.000
@sd     2.237
@min      1992
@max      1998
@values 1992, 1994, 1996, 1998
@names "1992", "1994", "1996", "1998"
@freq 550, 550, 550, 550
@type int
@label year
@class category
@N_unique 4
@N 2200

[+] year
@mathpnl_long2.dta

category
(int)

2200
(4)

"1992", "1994", "1996", "1998"

year

All properties
key	content
N	2200
N_unique	4
class	category
freq	550, 550, 550, 550
label	year
max	1998
mean	1995.000
min	1992
names	"1992", "1994", "1996", "1998"
sd	2.237
type	int
values	1992, 1994, 1996, 1998

file # command

ch5.01.do:

130 [+]

tabulate year

ch8.2.do:

25 [+]

levelsof year , local(yrlist)

file # command

ch5.01.do:

152 [+]

keep distid year

153 [+]

keep if year == 1992

155 [+]

drop year

ch8.2.do:

16 [+]

keep distid year expp avgsal math4sat math7sat

29 [+]

reshape wide expp avgsal math4sat math7sat , i(distid) j(year)

40 [+]

reshape long expp avgsal math4sat math7sat , i(distid) j(year)

Script Output


year:  year                                     Number of Observations
-----------                                 ------------------------------
                                            Total   Integers   Nonintegers
|  #   #   #   #             Negative           -         -          -
|  #   #   #   #             Zero               -         -          -
|  #   #   #   #             Positive        2200      2200          -
|  #   #   #   #                            -----     -----      -----
|  #   #   #   #             Total           2200      2200          -
|  #   #   #   #             Missing            -
+----------------------                     -----
1992               1998                      2200
   (4 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |      2200        1995    2.236576       1992       1998
@mean  1995.000
@sd     2.237
@min      1992
@max      1998
@values 1992, 1994, 1996, 1998
@names "1992", "1994", "1996", "1998"
@freq 550, 550, 550, 550
@type int
@label year
@class category
@N_unique 4
@N 2200

[+] year
@unionT.dta

category
(int)

26200
(12)

"1970", "1971", "1972", "1973", ".. "1987", "1988"

interview year

All properties
key	content
N	26200
N_unique	12
class	category
freq	1658, 1793, 1958, 2057, 2670, 1993, 2028, 2408, 2194, 2488, 2536, 2417
label	interview year
max	1988
mean	1979.471
min	1970
names	"1970", "1971", "1972", "1973", "1977", "1978", "1980", "1982", "1983", "1985", "1987", "1988"
sd	5.965
type	int
values	1970, 1971, 1972, 1973, 1977, 1978, 1980, 1982, 1983, 1985, 1987, 1988

Data Manipulations with year
file	#	command

Script Output


year:  interview year                           Number of Observations
---------------------                       ------------------------------
                                            Total   Integers   Nonintegers
|  #                         Negative           -         -          -
|  #               #         Zero               -         -          -
|  #               #         Positive       26200     26200          -
|  #       #   #   #                        -----     -----      -----
|  #   #   #   #   #         Total          26200     26200          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1970               1988                     26200
  (12 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |     26200    1979.471    5.965499       1970       1988
@mean  1979.471
@sd     5.965
@min      1970
@max      1988
@values 1970, 1971, 1972, 1973, 1977, 1978, 1980, 1982, 1983, 1985, 1987, 1988
@names "1970", "1971", "1972", "1973", "1977", "1978", "1980", "1982", "1983", "1985", "1987", "1988"
@freq 1658, 1793, 1958, 2057, 2670, 1993, 2028, 2408, 2194, 2488, 2536, 2417
@type int
@label interview year
@class category
@N_unique 12
@N 26200

[+] year
@wagepan.dta

category
(int)

4360
(8)

"1980", "1981", "1982", "1983", ".. "1986", "1987"

1980 to 1987

All properties
key	content
N	4360
N_unique	8
class	category
freq	545, 545, 545, 545, 545, 545, 545, 545
label	1980 to 1987
max	1987
mean	1983.500
min	1980
names	"1980", "1981", "1982", "1983", "1984", "1985", "1986", "1987"
sd	2.292
type	int
values	1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987

file # command

ch9.06.do:

10 [+]

regress lwage educ lhours if year == `y'

14 [+]

regress lwage educ lhours black hisp if year == `y'

18 [+]

regress lwage educ exper expersq lhours black hisp if year == `y'

39 [+]

regress lwage educ exper lhours if year == `y'

40 [+]

scatter lwage0 lwage1 lhours if year==`y' , msize(small) /// scheme(s2mono) nodraw /// name(scat`y',replace) ytitle(lwage) legend(pos(5) ring(0) col(1))

Data Manipulations with year
file	#	command

Script Output


year:  1980 to 1987                             Number of Observations
-------------------                         ------------------------------
                                            Total   Integers   Nonintegers
|  #       #       #         Negative           -         -          -
|  #       #       #         Zero               -         -          -
|  #       #       #         Positive        4360      4360          -
|  #   #   #   #   #                        -----     -----      -----
|  #   #   #   #   #         Total           4360      4360          -
|  #   #   #   #   #         Missing            -
+----------------------                     -----
1980               1987                      4360
   (8 unique values)

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        year |      4360      1983.5    2.291551       1980       1987
@mean  1983.500
@sd     2.292
@min      1980
@max      1987
@values 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987
@names "1980", "1981", "1982", "1983", "1984", "1985", "1986", "1987"
@freq 545, 545, 545, 545, 545, 545, 545, 545
@type int
@label 1980 to 1987
@class category
@N_unique 8
@N 4360

file # command

ch4.4.do:

21 [+]

list year employer length longspell , sepby(employer) noobs

ch5.01.do:

130 [+]

tabulate year

ch8.2.do:

25 [+]

levelsof year , local(yrlist)

55 [+]

tsline invrate if inrange(company, 1, 4) & year >= 1937 , by(company, ti(" ")) /// yline(0) ysc(range(-0.2 0.3)) ytick(-0.2(0.1)0.3) ylab(-0.2(0.1)0.3) /// scheme(s2mono)

ch9.06.do:

10 [+]

regress lwage educ lhours if year == `y'

14 [+]

regress lwage educ lhours black hisp if year == `y'

18 [+]

regress lwage educ exper expersq lhours black hisp if year == `y'

39 [+]

regress lwage educ exper lhours if year == `y'

40 [+]

scatter lwage0 lwage1 lhours if year==`y' , msize(small) /// scheme(s2mono) nodraw /// name(scat`y',replace) ytitle(lwage) legend(pos(5) ring(0) col(1))