**Table 4: Duration of Individual Questionnaire Modules, by Country**

|||**Camb**|**odia**|||**Ethio**|**pia**|||**Tanz**|**ania**||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||||Number<br>||||Number<br>||||Number<br>|
|Module Name|Median<br>(minutes)<br>|Mean<br>(minutes)|Std|of<br>Module|Median<br>(minutes)|Mean<br>(minutes)|Std|of<br>Module|Median<br>(minutes)|Mean<br>(minutes)|Std|of<br>Module|
|||||Obs.||||Obs.||||Obs.|
|education|1.67|2.35|1.93|6029|1.17|1.53|1.15|26066|2.62|3.14|2.10|4619|
|health|1.55|2.09|1.66|6332|1.30|2.04|1.84|28877|2.53|2.93|1.73|5550|
|labor|2.68|4.69|5.00|5741|2.48|3.20|2.31|23416|5.10|6.43|4.61|4616|
|land|8.80|11.22|13.07|3566|3.63|7.63|12.11|15040|8.44|12.81|15.90|2934|
|mobile phones|1.25|1.60|1.35|3430|0.58|0.77|0.73|15048|0.93|1.10|0.79|2926|
|financial assets|0.58|1.13|1.48|3660|0.88|1.60|1.72|15074|0.70|1.03|0.95|2437|
|livestock|1.97|2.50|2.09|2082|-|-|-|-|-|-|-|-|
|migration|1.35|3.10|4.11|4007|-|-|-|-|-|-|-|-|
|time|8.00|8.76|3.53|3650|-|-|-|-|-|-|-|-|
|durables|1.10|1.40|1.09|3663|-|-|-|-|-|-|-|-|
|savings|-|-|-|-|3.43|4.04|2.34|15037|-|-|-|-|
|subjective well-being|-|-|-|-|-|-|-|-|1.70|1.91|1.36|3503|
|food outside household|-|-|-|-|-|-|-|-|0.23|0.59|0.84|5524|
|all ind modules combine|d<br>21.9|25.17|22.01|6363|8.68|13.29|13.73|28958|16|20.43|17.9|5564|
|||**Camb**|**odia**|||**Ethio**|**pia**|||**Tanz**|**ania**||
||||Avergae|Average<br>|||Avergae|Average<br>|||Avergae|Average<br>|
||% HH/Ind|Total|<br>question|length per<br>uestion|% HH/Ind|Total|<br>question|length per<br>uestion|% HH/Ind|Total|<br>question|length per<br>uestion|
|Module Name|answering|question<br>|answered|q<br>i|answering|question<br>|answered|q<br>i|answering|question|answered|q<br>i|
||module<br>i|n module|per<br>HH/Ind|(mnutes)<br>if<br>answered|module<br>|in module|per<br>HH/Ind|(mnutes)<br>if<br>answered|module<br>|in module|<br>per<br>HH/Ind|(mnutes)<br>if<br>answered|
|education|95|29|13|0.14|90|25|9|0.15|83|49|16|0.18|
|health|100|29|12|0.13|100|52|14|0.14|100|61|19|0.15|
|labor|90|81|20|0.17|81|62|20|0.15|83|96|29|0.20|
|land|56|49|25|0.11|52|154|31|0.13|53|128|23|0.18|
|mobile phones|54|14|9|0.13|52|12|5|0.15|53|14|6|0.16|
|financial assets|58|22|5|0.12|52|20|5|0.15|44|17|4|0.15|
|apartment|0|19|10|0.11|-|-|-|-|-|-|-|-|
|livestock|33|14|8|0.16|-|-|-|-|-|-|-|-|
|migration|63|72|14|0.19|-|-|-|-|-|-|-|-|
|time|57|50|49|0.16|-|-|-|-|-|-|-|-|
|durables|58|8|5|0.17|-|-|-|-|-|-|-|-|
|savings|-|-|-|-|52|38|18|0.11|-|-|-|-|
|subjective well-being|-|-|-|-|-|-|-|-|63|17|10|0.17|
|food outside household|-|-|-|-|-|-|-|-|99|15|3|0.18|

**Notes:** Number of module observations is based on how many modules a person/household answered.

Moreover, when interpreting the results in Table 4, the duration estimates for the modules on asset ownership are not conditional on ownership of the type of asset in question. For example, the incidence of financial asset ownership is fairly low across countries and thus individuals that respond “no” to the initial filter question on ownership would not complete the remaining questions. This drives down the module-specific mean and median estimates. In this respect, Table 5 provides information on how interview length varies when a respondent’s ownership of assets is taken into account. Conditional on the individual’s ownership of the applicable asset, the average duration estimates for the modules on mobile phones, financial assets, and livestock are still quite low across countries. On the other hand, the conditional average duration for the land module ranges from 10 to 18 minutes (in comparison to the unconditional range of 8 to 13 minutes, as shown in Table 4).

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