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Re: st: creating panel of household surveyed in different year


From   Prakash Singh <prakashbhu@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: creating panel of household surveyed in different year
Date   Wed, 22 May 2013 12:49:04 +0530

Thanks Nick and Chamara for the help

I hope it will work well with addition of more survey years also.

Prakash

On Wed, May 22, 2013 at 12:26 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> As Chamara says, there are different ways to do this. Here is a
> slightly different approach.
>
> bys hhid (survey_year): gen numsurvey=_N
> bys hhid: gen entry = _n ==  1
> bys hhid: gen exit = _n == _N
>
> Nick
> njcoxstata@gmail.com
>
>
> On 22 May 2013 06:46, Chamara Anuranga <kcanuranga@gmail.com> wrote:
>> Dear Prarkash
>>
>> There are different way you can do same thing on Stata. If your
>> dataset organized like this I suggest to do the following
>> bys hhid: gen numsurvey=_N
>> bys hhid: egen minyear=min(survey_year)
>>
>> gen entry=survey_year==minyear
>> bys hhid: egen maxyear=max(survey_year)
>> gen exit=survey_year==maxyear
>>
>>
>> numsurvey gives the number of times each household appear on the survey
>> entry is 1 if the household appear on the survey at first time and otherwise 0
>> exit is 1 if the household surveyed  at the last time
>> do the label defne for entry and exit variables.
>>
>> label define yesno 1 "Yes"  2 "No"
>> label val entry yesno
>> label val exit yesno
>>
>> if household only survey once entry and exit both get 1 (yes). However
>> you can  change the variable way you prefer base on numsurvey
>> variable.
>>
>> Hope this help.
>>
>> Thanks,
>> Chamara
>>
>> On Wed, May 22, 2013 at 10:19 AM, Prakash Singh <prakashbhu@gmail.com> wrote:
>>> Thanks Chamara and Nick
>>>
>>> Nick, I am providing the id of first ten household surveyed in 1997
>>> and 2002 below.
>>>
>>> hhid    survey_year     entry   exit
>>> 181004  1997
>>> 181007  1997
>>> 181113  1997
>>> 181801  1997
>>> 182003  1997
>>> 182601  1997
>>> 182615  1997
>>> 182711  1997
>>> 182716  1997            yes
>>> 182803  1997            yes
>>> 181001  2002    yes
>>> 181004  2002
>>> 181007  2002
>>> 181113  2002
>>> 181801  2002
>>> 182003  2002
>>> 182201  2002    yes
>>> 182601  2002
>>> 182615  2002
>>> 182711  2002
>>>
>>> Now if you look at the id, household no 181001 and 182201 were not
>>> part of 1997 survey household no 182716 and 182803 did not
>>> participated in the 2002 survey.
>>>
>>> My interest is first to generate one variable which identifies
>>> households participated in all the survey; second variable identifying
>>> new household in the survey and finally third variable identifying
>>> household not participated in survey.
>>> There are two more rounds of data which I am extracting still.
>>>
>>> I hope I have made progress in expressing my query.
>>>
>>>
>>>
>>> Prakash
>>>
>>> On Tue, May 21, 2013 at 5:30 PM, Nick Cox <njcoxstata@gmail.com> wrote:
>>>> My own guess is that Prakash's previous post was ignored because it
>>>> was too vague about precise data structure and the revised post
>>>> doesn't add much.  At least that is why I deleted it. A specific
>>>> example showing what you have is usually preferable to a long verbal
>>>> discussion.
>>>>
>>>> The solution below seems unnecessarily complicated. Splitting the
>>>> dataset into three and then -merge-ing them back again is only
>>>> possible if there is some identifier in the dataset that tells you
>>>> which survey round is being referred to. Why not just do it in place?
>>>>
>>>> At its simplest the number of rounds in which each household
>>>> participated may just be the number of times the household appears in
>>>> the dataset. Otherwise there should be some round identifier. There
>>>> seems little point in speculating about variables, as Prakash can
>>>> (please) give concrete details.
>>>>
>>>> Same applies to entry and exit: show us how the data are held, and
>>>> specific suggestions are then much easier.
>>>>
>>>> Nick
>>>> njcoxstata@gmail.com
>>>>
>>>>
>>>> On 21 May 2013 11:42, Chamara Anuranga <kcanuranga@gmail.com> wrote:
>>>>> Dear Prakash,
>>>>>
>>>>> keep id variable in each survey and create new variable to identify each survey.
>>>>> for the dataset 1
>>>>> gen svyname1="survey1"
>>>>> for dataset 2
>>>>> gen svyname2="survey2"
>>>>>
>>>>> etc.
>>>>> now you have 3 datasets. Merge them base on id. check the missing for svynames
>>>>>
>>>>> egen totmiss=rowmiss(svyname*)
>>>>>
>>>>> if rowmiss if 0 it mean those household appears in 3 rounds.
>>>>>
>>>>>
>>>>> Thanks
>>>>> Chamara
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Tue, May 21, 2013 at 3:57 PM, Prakash Singh <prakashbhu@gmail.com> wrote:
>>>>>> Hello every one
>>>>>> I had sent mail earlier also but may the subject was not appropriate
>>>>>> to draw attention so I am sending this again with revised subject.
>>>>>>
>>>>>> I am working with survey dataset of more than three rounds. The
>>>>>> identification code for each household is similar in all the rounds.
>>>>>>
>>>>>> Now there are some households which are surveyed in all the years,
>>>>>> there are some households surveyed in some year but not in other years
>>>>>> (did not participated in the survey). Now I want to map the households so that
>>>>>> I can know which household is surveyed in more than two rounds and
>>>>>> also want create panel of household which are surveyed in all the
>>>>>> years.
>>>>>>
>>>>>> I am also interested in entry and exit of households, where entry
>>>>>> means new household coming in the subsequent round of survey and exit
>>>>>> means leaving the survey in the subsequent round of survey.
>>>>>>
>>>>>> Please suggest how should I workout this problem.
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