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Codebook
Summarize
Browse
Edit
Describe
Rename
Tabstat
Tabulate
Drop
Changing Data
o Rename
 To rename the title of variable
o Replace
 To change the content of variable
o Destring
 To convert string data into numeric variables
o Encode
 To convert string into numeric variables
o Tsset
 To change the date format, daily, monthly, yearly
 Generating new variables
o Generate
 To create new variables
o Egen
 Extended version of the generate
o Codebook
 To see further adjustment once new variable
created
Regress y k l
Predict residuals
Corr residual k l
 Regress
o Used to regress IV and DV
Count if var2>3
Command to count the no of values greater than three
By var1 : Count if var2>3
Further categorize the count command
label variable id "serial of observations"
Stata has two built-in variables called _n and _N. _n is Stata notation for the
current observation number. _n is 1 in the first observation, 2 in the second, 3 in
the third, and so on.
generate id = _n for serial no 1,2,3,4,5…
generate nt = _N
list
sort hhcode idc ucode
. by hhcode: generate n1 = _n
. by hhcode: generate n2 = _N
generate RBO = ( sondau-1)/( n2-1)
sort group score
by group: generate n1 = _n
by group: generate n2 = _N
list
score
group
id
nt
n1
1.
72
1
1
7
1
2.
76
1
3
7
2
3.
85
1
7
7
3
4.
90
1
6
7
4
5.
82
2
5
7
1
6.
84
2
2
7
2
7.
89
3
4
7
1
n2
4
4
4
4
2
2
1
list if n1==1
score
group
id
nt
n1
1.
72
1
1
7
1
5.
82
2
5
7
1
7.
89
3
4
7
1
score
group
id
nt
n1
4.
90
1
6
7
4
6.
84
2
2
7
2
7.
89
3
4
7
1
n2
4
2
1
list if n1==n2
n2
4
2
1
For son/daughter siblings order steps command
 sort sondau hhcode id
 by sondau hhcode: replace sondau = _n if relation ==3

sort id
work file commad
generate check = idc<=1 & relation<=1
where the two values if different coulums are same will be 1
FOR PRIMARY EDUATION
by hhcode: gen PEDU1 = education>=5 if relation==1 &
education<8
--by hhcode: generate PEDU1 = 1 if idc==relation
where the two values in different columns are same will
generate 1
--by hhcode: generate PEDU1 = 1 if relation<=1 & sc1q05<=5
OR
-- by hhcode: generate PEDU1 = 1 if relation==1 & sc1q05<=5
where the family head have class 5 education
FOR MIDDLE EDUCATION
--by hhcode: generate PEDU2 = 1 if relation==1 & sc1q05>5&
sc1q05<=8
replace PEDU2 = .
by hhcode: replace PEDU2 = education>=8 if relation==1 &
education<10
where the head will have middle education and more than
class 5 education will be equal to 1
MATRIC
by hhcode: gen PEDU3 = education>=10 if relation==1 &
education<12
--. by hhcode: generate PEDU3 = 1 if relation==1 & sc1q05>8&
sc1q05<=10
INTERMEDIATE
by hhcode: gen PEDU4 = education>=12 if relation==1 &
education<13
--by hhcode: generate PEDU4 = 1 if relation==1 & sc1q05>10 &
sc1q05<=12
BACHELOR
by hhcode: genarate PEDU5 = education>=13 if relation==1 &
education<14
--by hhcode: generate PEDU5 = 1 if relation==1 & sc1q05>12 &
sc1q05<=14
MASTER
by hhcode: gen PEDU6 = education>=14 if relation==1 &
education<22
--by hhcode: generate PEDU6 = 1 if relation==1 & sc1q05>14 &
sc1q05<=16
MS/MPHIL
by hhcode: gen PEDU7 = education>=22 if relation==1 &
education<25 & education != 23
23 to eliminate phd
--by hhcode: generate PEDU7 = 1 if relation==1 & sc1q05==22&24
Where the head education is MS mphil
PHD
by hhcode: replace PEDU8 = education>=23 if relation==1 &
education<24
Where the head education is Phd
To create dummy variable
1. tab seaq06, ge(seaq06)
2. tabulate region, gen(r)
3. tabulate seaq06, gen(workD)
4. tab sc1q01, ge(schoolD)
to create dummy variable
to change order of variable use command
1. order education, before( EDU1)
will move the variable before edu1 variable
2. order education, last
will move the variable to last
3. order education
will move the variable to first
to convert numeric value into alphabet
decode relation, gen(Relation)
will convert the numeric value into alphabet 1 for head, 2 for
spouse
to create automatically dummy variables
regress age i.relation
will automatically create dummy variable to regress.
regress age b2.relation
will change the base group where value 2 for spouse.
CHILD EVER ATTENDED SCHOOL
generate schoolD4 = school>1 if relation==3 & school !=.
--generate school4 = 1 if sc1q01 !=1
education dummy equal to 1 where never attended school
generate EDULEVEL1 = sc1q05<5 & relation==3
--generate EDULEVEL = sc1q05<5 & relation==3
to generate 1 if education is less than primary only for
son/daughters
replace EDULEVEL1 = 2 if (sc1q05>=5 & relation==3) & (sc1q05<10)
--replace EDULEVEL = 2 if (sc1q05>=5 & relation==3) & (sc1q05<10)
to replace existing variable value with 2 if education is primary
but not secondary only for son/daughters
replace EDULEVEL = 3 if (sc1q05>=10 & relation==3) & (sc1q05<12)
to replace existing variable value with 2 if education is
secondary
FOR CONSTRUCTION OF EDUCATION VARIABLE DUMMY
1. less than primary
a. generate eduD1 = education<5 if relation==3
2. primary level
a. generate eduD2 = education>=5 if relation==3 &
education<10
3. secondary level and higher
a. generate eduD3 = education>=10 if relation==3 &
education <25
SCHOOL LEVEL (PRIMARY, SECONDARY)
generate schlevel = "less than primary" if education<5 & sb1q2==3
replace schlevel = "primary" if education>=5 & sb1q2==3 &
education <10
replace schlevel = "secondary school" if education>=10 & sb1q2==3
& education <24
encode schlevel, gen(schlevel1)
drop schlevel
TO DROP OBSERVATIONS
drop in 870172/921656 ……………. Write in command window
TO VERIFY IF VALUES IN TWO COLUMS NOT SAME
list if age != AGE
to verify values in columns if not equal
SIBLING SIZE/ORDER IN FAMILY
1. gsort hhcode relation -age
sort age descending used minus sign
2. by hhcode relation: replace siblingorder = _n if relation==3
to order the siblings only for son/daughter
3. by hhcode relation: replace siblingsize = _N if relation==3
to count the siblings in family
RELATIVE BIRTH ORDER
replace RBO = (siblingorder-1) / (siblingsize-1)
SUMMARY OF VARIABLES
tab work province , col ch
MULTIVARIATE LOGIT MODEL
mlogit schoollevel familysize relativebirthorder i.work
mlogit schoollevel familysize relativebirthorder i.work, rrr
mlogit schoollevel familysize relativebirthorder if age<=17 &
relation==3
How to set the ‘Time variable’ for time series
analysis in STATA?
https://www.projectguru.in/setting-time-variable-time-seriesanalysis-stata/
COUNTING FROM _N TO _N
https://stats.oarc.ucla.edu/stata/seminars/notes/counting-from_n-to_n/#:~:text=Stata%20has%20two%20built%2Din,the%20total%20n
umber%20of%20observations.