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Parent-bias, an extension
Last registered on July 10, 2019

Pre-Trial

Trial Information
General Information
Title
Parent-bias, an extension
RCT ID
AEARCTR-0004386
Initial registration date
June 27, 2019
Last updated
July 10, 2019 1:40 PM EDT
Location(s)
Region
Primary Investigator
Affiliation
University of zurich
Other Primary Investigator(s)
PI Affiliation
University of Zurich
Additional Trial Information
Status
In development
Start date
2019-06-29
End date
2019-12-27
Secondary IDs
Abstract
This document is an update to the study pre-registered with the AEA RCT Registry with ID AEARCTR-0003535. In a new wave of data collection , we will conduct a series of experimental games to:
1) assess whether parent-bias remains widespread in our sample when we allow respondents to chose an equal split of resources,
2) measure the correlation between our experimental measure of parent-bias and the take-up of commitment devices when making investment decisions,
3) contrast willingness-to-pay for commitment to stick to one's plans to invest in one's child and in another person's child and
4) estimate whether parent-biased respondents have a higher willingness-to-pay to open a bank account in their child's name.

The present document outlines the experimental design and the econometric methods we will use to assess those three points.
External Link(s)
Registration Citation
Citation
lichand, Guilherme and Juliette Thibaud. 2019. "Parent-bias, an extension." AEA RCT Registry. July 10. https://doi.org/10.1257/rct.4386-1.0.
Former Citation
lichand, Guilherme , Juliette Thibaud and Juliette Thibaud. 2019. "Parent-bias, an extension." AEA RCT Registry. July 10. http://www.socialscienceregistry.org/trials/4386/history/49733.
Sponsors & Partners

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Experimental Details
Interventions
Intervention(s)
Intervention Start Date
2019-06-29
Intervention End Date
2019-07-30
Primary Outcomes
Primary Outcomes (end points)
-Parent-bias
-Willingness to pay to commit to invest in one's child
-Willingness to pay to commit to invest in another person's child
-Willingness to pay to open a savings' account in one's name
Primary Outcomes (explanation)
"Parent-bias" is a dummy variable equal to 1 if the parent choses to allocate a higher share of consumption to the child in period t=3 than in period t=2
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
We will conduct a series of experimental games as an extension of our original experiment (AEA RCT Registry with ID AEARCTR-0003535).
All mothers from the households of our original sample will be invited to take part in the follow-up. For all of them, we will elicit:
-A renewed measure of parent-bias and inter-temporal preferences,
-Willingness-to-pay to commit to an investment in their child,
-Willingness-to-pay to commit to an investment in another person's child,
-Willingness-to-pay to open a bank account in the child's name

If the household has more than one child of primary-school age, we will randomly select which child will take part in the experiment.
Experimental Design Details
Randomization Method
-A scenario will be randomly chosen to be executed by the data collection tablets, on the field
-The child will be randomly selected to take part in the games by the data collection tablets, on the field
Randomization Unit
Individual
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
80 villages

Sample size: planned number of observations
2,411 individuals
Sample size (or number of clusters) by treatment arms
2,411 (there are no separate treatment arms in this trial)
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
1-Does the prevalence of parent-bias shrinks when we allow for an equal split of resources? -We will be able to detect a 0.0807 standard deviation difference in the prevalence of parent-bias once we allow respondents to chose an equal split. 2-Do parent-biased respondents have a higher willingness-to-pay to stick to their plans to invest in their children? Assuming that 80% of the respondents in our sample take-up the tutoring for their children and that 30% of our sample is parent-biased, this will enable us to detect a 0.1393 standard deviation difference in the willingness-to-pay for commitment to investments in children between parent-biased and non-parent-biased respondents. 3-Do respondents demand less commitment devices to stick to their plans to invest in someone else's child than in their own? Assuming that 50% of the respondents in our sample take-up the tutoring for their children and that 30% of our sample is parent-biased (in line with our baseline measure without accounting for the price of commitment), this will enable us to detect a 0.1144 standard deviation difference in the willingness-to-pay for commitment to investments in someone else's child. 4-Do parent-biased respondents have a higher willingness-to-pay to open a savings' account in their child's name rather than their own? Assuming that 30% of our sample is parent-biased, this will enable us to detect a 0.1246 standard deviation difference in the willingness-to-pay of parent-biased respondents.
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
NATIONAL COMMITTEE ON RESEARCH IN THE SOCIAL SCIENCES AND HUMANITIES Malawi
IRB Approval Date
2019-06-06
IRB Approval Number
NCST/RTT/2/6
IRB Name
Human Subjects Committee of the Faculty of Economics, Business Administration, and Information Technology, university of zurich
IRB Approval Date
2019-06-05
IRB Approval Number
OEC IRB # 2019-024
Analysis Plan

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Post-Trial
Post Trial Information
Study Withdrawal
Intervention
Is the intervention completed?
No
Is data collection complete?
Data Publication
Data Publication
Is public data available?
No
Program Files
Program Files
Reports, Papers & Other Materials
Relevant Paper(s)
REPORTS & OTHER MATERIALS