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DECOMPOSING ERREYGERS CONCENTRATION INDEX - STATA... Tue, 07 February 2017 06:51
 Mlue Messages: 52Registered: February 2017 Location: Cape Town Senior Member
Hi there,

I am in the process of writing a research paper. I am using Sierra Leone womens DHS dataset. I have used conindex to compute the concentration index (Erreygers). The variable of interest is binary = Contraceptive use (0=No, 1=Yes).

I would like to know if there's anyone who might have a do-file which computes the decomposition of the Erreygers concentration index (using the Wealth Index and Education as the socioeconomic variables). I want to decompose the index to further illustrate the contribution of certain background factors to inequality.

If anyone has worked on something similar, please let me know - or preferably send your do-file so that I can try to adapt it for my research. Thank you.
Re: DECOMPOSING ERREYGERS CONCENTRATION INDEX - STATA... [message #11772 is a reply to message #11764] Tue, 07 February 2017 12:02
 Liz-DHS Messages: 1385Registered: February 2013 Senior Member
A response from Dr. Shireen Assaf:
Quote:

Hello,

The following code can be used for obtaining the concentration index with the erreygers correction assuming you have computed your outcome variable cpr (contraceptive use). Here I am showing this for the wealth index, the same should follow for the education variable.
```gen wt= v005/1000000
conindex cpr [pw=wt], rankvar(v190) bounded limits(0 1) erreygers cluster(v001)
```

Thank you.
Best,

Re: DECOMPOSING ERREYGERS CONCENTRATION INDEX - STATA... [message #11776 is a reply to message #11764] Wed, 08 February 2017 04:54
 Mlue Messages: 52Registered: February 2017 Location: Cape Town Senior Member
Hi Liz,

I was able to compute the CPR variable and used Conindex to derive the Erreygers concentration index.

Now I am stuck trying to decompose this index - to estimate the percentage contribution of background factors to the overall inequality.

I would like an example (STATA CODE / do-file) of the way in which one can decompose the Wagstaff / Erreygers concentration index in STATA.
Re: DECOMPOSING ERREYGERS CONCENTRATION INDEX - STATA... [message #11777 is a reply to message #11776] Wed, 08 February 2017 08:54
 Liz-DHS Messages: 1385Registered: February 2013 Senior Member
Dear User, Dr. Assaf replied:
Quote:

We do not have do files for this type of analysis as far as I know. This is really a question about Stata not DHS. I suggest you ask the Stata forum http://www.statalist.org/

Re: DECOMPOSING ERREYGERS CONCENTRATION INDEX - STATA... [message #11778 is a reply to message #11777] Wed, 08 February 2017 09:07
 Mlue Messages: 52Registered: February 2017 Location: Cape Town Senior Member
Thank you
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