The EquityTool has been updated based upon new source data. The original version is no longer active but is available upon request.
Previous version released: February 24, 2017
Source data: Myanmar DHS 2015-16
# of survey questions in original wealth index: 45
# of variables in original index: 141
# of survey questions in EquityTool: 15
# of variables in EquityTool: 16
|Question||Option 1||Option 2||Option 3|
|Q1||Does your household have… a television?||Yes||No|
|Q2||… a mobile phone?||Yes||No|
|Q3||… a refrigerator?||Yes||No|
|Q4||… a table?||Yes||No|
|Q5||… a chair?||Yes||No|
|Q6||… a bed?||Yes||No|
|Q7||… a cupboard?||Yes||No|
|Q8||… an electric fan?||Yes||No|
|Q9||… a computer?||Yes||No|
|Q10||Does any member of your household own a watch?||Yes||No|
|Q11||Does any member of your household have a bank account?||Yes||No|
What is the main source of drinking water for members
of your household?
|Q13||What is the main material of the floor of your dwelling?||Cement||Other|
|Q14||What is main material of the exterior walls of your dwelling?||Meshed bamboo||Other|
|Q15||What type of fuel does your household mainly use for cooking?||Electricity||Wood||Other|
The standard simplification process was applied to achieve high agreement with the original wealth index. Kappa was greater than 0.75 for the national and urban indices. Details on the standard process can be found in this article. The data used to identify important variables comes from the factor weights released by ICF.
Level of agreement:
Urban only population
Respondents in the original dataset were divided into three groups for analysis – those in the 1st and 2nd quintiles (poorest 40%), those in the 3rd quintile, and those in the 4th and 5th quintiles (richest 40%). After calculating their wealth using the simplified index, they were again divided into the same three groups for analysis against the original data in the full DHS. Agreement between the original data and our simplified index is presented above.
What does this mean?
When shortening and simplifying the index to make it easier for programs to use to assess equity, it no longer matches the original index with 100% accuracy. At an aggregate level, this error is minimal, and this methodology was deemed acceptable for programmatic use by an expert panel. However, for any given individual, especially those already at a boundary between two quintiles, the quintile the EquityTool assigns them to may differ to their quintile according to the original DHS wealth index.
The graph below illustrates the difference between the EquityTool generated index and the full DHS wealth index. Among all of those people (20% of the population) originally identified as being in the poorest quintile, approximately 76% are still identified as being in the poorest quintile when we use the simplified index. However, approximately 23% of people are now classified as being in Quintile 2. From a practical standpoint, all of these people are relatively poor. Yet, it is worthwhile to understand that the simplified index of 15 questions produces results that are not identical to using all 45 questions in the original survey.
The following table provides the same information on the movement between national quintiles when using the EquityTool versus the original DHS wealth index:
|EquityTool National Quintiles|
|Quintile 1||Quintile 2||Quintile 3||Quintile 4||Quintile 5||Total|
|Original DHS National Quintiles||Quintile 1||15.20%||4.50%||0.30%||0.00%||0.00%||20%|
The following graph provides information on the movement between urban quintiles when using the EquityTool versus the original DHS wealth index:
The following table provides the same information on the movement between urban quintiles when using the EquityTool versus the original DHS wealth index:
|EquityTool Urban Quintiles|
|Quintile 1||Quintile 2||Quintile 3||Quintile 4||Quintile 5||Total|
|Original DHS Urban Quintiles||Quintile 1||17.80%||2.10%||0.00%||0.00%||0.00%||20%|
Data interpretation considerations:
Changes from the previous EquityTool
We released an EquityTool on February 24th 2017 which compared user data to a benchmark from 2014 census data. A new source survey, the DHS 2015 was recently released, and allows us to benchmark results to a more recent population. This is important, because wealth generally increases over time, and comparing your respondents to an old benchmark population will lead to over-estimating the relatively wealthy in your survey. The new EquityTool was generated using a broadly similar methodology as the previous version – which employed an urban/rural disaggregated analysis and was evaluated against the gold standard across all 5 quintiles, instead of the bottom 40%, middle 20%, and top 40%. In generating the new EquityTool, no attempt was made to account for the fact that a previous version existed. In other words, we did not explicitly try to keep the same questions or response options as the previous tool.
For those who have not previously conducted an EquityTool based study in Myanmar, the remainder of this section is not particularly relevant. For those who have used the previous EquityTool, you may be interested to know how the two versions compare.
|Source Data||Census 2014||DHS 2015-16|
|# of questions in EquityTool||14||15|
|# of questions in full wealth index||22||45|
|Kappa statistic (EquityTool vs full wealth Index)|
National – 0.759
Urban – 0.759
(across 5 quintiles)
National – 0.751
Urban – 0.751
(across 3 groups)
Practical considerations for users of the previous EquityTool
Comparing the results of surveys that used the previous EquityTool against those that use the current EquityTool is difficult. It will not always be clear whether any difference is because of actual differences in the wealth level of the respondents or because the EquityTool has changed.
It is generally best to use the current version of the EquityTool, since it will give a more accurate quintile estimate. If you are currently collecting data with the previous tool, it is best to continue to use the previous tool. Note that if you have created a survey in the EquityTool web application using the previous EquityTool, that survey will continue to use the previous EquityTool.
If conducting a follow-up survey to a baseline that used the previous EquityTool, and the most important result is change from the baseline, it may be preferable to continue to use the previous EquityTool for comparability. If you need to do this, please contact us at firstname.lastname@example.org.
Technical comparison between the current and previous EquityTool
Unfortunately, differences in the questionnaire design for the two source datasets—the 2014 census and the 2015-16 DHS—limit the utility of more detailed technical comparisons between the current and previous EquityTool, so we do not offer them here.
Metrics for Management provides technical assistance services to those using the EquityTool, or wanting to collect data on the wealth of their program beneficiaries. Please contact email@example.com and we will assist you.
 From povertydata.worldbank.org, reporting Poverty headcount ratio at $1.90/day at 2011 international prices.
 From the Myanmar DHS 2015-16 dataset household recode, available at http://dhsprogram.com/