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Timing of Childbearing Among Singaporean Married Couples
Last registered on April 09, 2018

Pre-Trial

Trial Information
General Information
Title
Timing of Childbearing Among Singaporean Married Couples
RCT ID
AEARCTR-0002874
Initial registration date
April 09, 2018
Last updated
April 09, 2018 2:47 PM EDT
Location(s)

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Primary Investigator
Affiliation
Lee Kuan Yew School of Public Policy, National University of Singapore
Other Primary Investigator(s)
Additional Trial Information
Status
In development
Start date
2018-04-16
End date
2022-12-31
Secondary IDs
Abstract
Singapore’s total fertility rate stands at 1.25, well below the population replacement level. One of the reasons for the low rate is a relatively high average age at childbearing. This study attempts to understand the factors behind timing of parenthood after marriage, including the attitudes and motivations of Singaporean women towards childbearing, as well as the constraints and issues they face.
External Link(s)
Registration Citation
Citation
Tan, Poh Lin. 2018. "Timing of Childbearing Among Singaporean Married Couples." AEA RCT Registry. April 09. https://doi.org/10.1257/rct.2874-1.0.
Former Citation
Tan, Poh Lin. 2018. "Timing of Childbearing Among Singaporean Married Couples." AEA RCT Registry. April 09. http://www.socialscienceregistry.org/trials/2874/history/27820.
Experimental Details
Interventions
Intervention(s)
This research study involves two stages.

1. An interviewer will visit the participant at their residence, a café or similar public space. They will ask some questions about their family, views about having children in Singapore and work-life balance. In addition, there will be some confidential questions, e.g. frequency and satisfaction with sexual activity within marriage, life and marital satisfaction, and height and weight. These questions will not be asked by the interviewer but through a computerized self-administered questionnaire. The interview will take up to 60 minutes. All participants will receive a token of appreciation in Fairprice vouchers. In addition, some participants will be randomly selected to receive an additional gift and some instructions on how to use it.

2. For the next 14 weeks after the interview, they will receive biweekly messages via email and/or Whatsapp. The message will provide them with an online link to online diary with questions. The questions will take around five minutes to answer. Participants who complete the online diary will receive a token of appreciation in Fairprice vouchers.

In addition, up to 20 individuals out of 660 participants may be invited to participate in a one-time 90-minute focus group discussion. Invited participants can accept or refuse the invitation without penalty.
Intervention Start Date
2018-04-16
Intervention End Date
2018-08-03
Primary Outcomes
Primary Outcomes (end points)
Frequency and timing of sexual activity
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
Some participants will be randomly selected to receive an additional gift and some instructions on how to use it.
Experimental Design Details
Not available
Randomization Method
By computer
Randomization Unit
Individual
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
660
Sample size: planned number of observations
660
Sample size (or number of clusters) by treatment arms
660
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
National University of Singapore IRB
IRB Approval Date
2018-04-05
IRB Approval Number
N-17-048