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st: algorithm to allocate time


From   "Michael Ralph M. Abrigo" <mmabrigo@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: algorithm to allocate time
Date   Thu, 7 Jun 2012 13:17:14 +0800

Hi everyone,

I'm working with pilot time-use survey (TUS) data from my country.
Unlike in other TUSs where a primary activity is specified, in our
case all activities and time are listed without regard to which
activity is the primary activity for a given time. I need to allocate
time spent on multiple activities to each of these activities, such
that time spent on all activities will equal 24 hours for a day.
Without additional information, I am thinking of just splitting the
time spent on multiple activities equally among activities. However I
have no idea how to automate it in Stata. A sample of the data is as
follows:

id startampm starthour startminute endampm endhour endminute actvty
1  am        10        1           am      10      30        911
1  am        10        15          am      11      45        832
1  am        11        0           am      11      30        465
1  am        11        30          pm      1       45        223
1  pm         1        30          pm      2       30        911

where
id - respondent id
*ampm - if activity (started/ended) in am or pm
*hour - hour activity (started/ended)
*minute - minute activity (started/ended)
actvty - is a number code of the activity done

I hope to hear your suggestions. Thank you in advance.


With best,
Michael

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