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Re: Calculating Period Parity Progression Ratio [message #8691 is a reply to message #8674] |
Wed, 02 December 2015 13:23 ![Go to previous message Go to previous message](/theme/default/images/up.png) ![Go to next message Go to previous message](/theme/default/images/down.png) |
Liz-DHS
Messages: 1516 Registered: February 2013
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Senior Member |
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Dear User,
Here is a response from Dr. Tom Pullum:
Quote:I don't have the original programs, but the Stata lines to reproduce table 16.28, which gives the number of births by birth order and calendar year, are simple:
* To reproduce table 16.28 in Methods and Materials of Demography, 2nd edition
* Philippines 1998 survey; use the BR file
* The table in M&M only goes to order 8
* Note that year of birth, b2, in this survey, gives only the last two digits
*open PHBR5BFL.dta
set more off
* unweighted, as in table 16.28
tab bord b2 if b2>=90
* weighted, which would be typical for analysis
tab bord b2 [iweight=v005/1000000] if b2>=90
I do not have time to re-write the Stata code to reproduce table 16.5, which is woman-years of exposure in each combination of five-year age intervals and five-year time intervals. DHS does not normally go back in time for more than 15 years, and the time intervals are generally 0-4 years before the survey, 5-9 years, before the survey, etc., rather than time intervals defined by calendar years such as 1995-99. You can look for a link to a fertility rates program elsewhere on the forum or the website. Such programs will produce the numerators and the denominators of the rates, as well as the rates themselves.
The approach I generally take for such a table is to construct, for each woman in the IR file, the first and last cmc when she was in each age interval, and the first and last cmc when she was in each time interval. (For calendar years of time, the first and last months will be the same for all woman. For years ago, the first and last months will differ somewhat from one woman to another, depending on the month in which she was interviewed.) You then count up the number of months each woman lived in each combination of age and time. Then add up across all women and divide by 12 to go from months to years. You can do the addition with the collapse command in Stata.
[Updated on: Wed, 02 December 2015 14:22] Report message to a moderator
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Calculating Period Parity Progression Ratio
By: gbemtrol on Wed, 19 August 2015 06:17
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Re: Calculating Period Parity Progression Ratio
By: Liz-DHS on Wed, 19 August 2015 15:09
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Re: Calculating Period Parity Progression Ratio
By: gbemtrol on Wed, 19 August 2015 16:02
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Re: Calculating Period Parity Progression Ratio
By: gbemtrol on Thu, 20 August 2015 04:46
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Re: Calculating Period Parity Progression Ratio
By: Liz-DHS on Thu, 20 August 2015 11:48
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Re: Calculating Period Parity Progression Ratio
By: gbemtrol on Fri, 21 August 2015 23:39
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Re: Calculating Period Parity Progression Ratio
By: devraj on Mon, 30 November 2015 01:35
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Re: Calculating Period Parity Progression Ratio
By: Liz-DHS on Wed, 02 December 2015 13:23
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Re: Calculating Period Parity Progression Ratio
By: devraj on Sun, 14 May 2017 06:37
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Re: Calculating Period Parity Progression Ratio
By: rajaram on Sun, 28 January 2018 04:56
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Re: Calculating Period Parity Progression Ratio
By: Liz-DHS on Wed, 04 April 2018 16:10
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