Friendly workplaces for working mothers: Do lactation rooms promote women’s labor force participation, productivity and breastfeeding? And how do we encourage organizations to create them?

Last registered on May 26, 2026

Pre-Trial

Trial Information

General Information

Title
Friendly workplaces for working mothers: Do lactation rooms promote women’s labor force participation, productivity and breastfeeding? And how do we encourage organizations to create them?
RCT ID
AEARCTR-0011380
Initial registration date
March 27, 2024

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
April 02, 2024, 11:03 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Last updated
May 26, 2026, 6:12 AM EDT

Last updated is the most recent time when changes to the trial's registration were published.

Locations

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Primary Investigator

Affiliation
Bocconi University

Other Primary Investigator(s)

PI Affiliation
Bocconi University

Additional Trial Information

Status
On going
Start date
2024-01-01
End date
2026-12-31
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
This project studies a specific policy intended to make workplaces more supportive of women’s needs, which in turn may increase women’s labor force participation, productivity and well-being: the creation of lactation rooms in the workplace to allow women to better combine work and breastfeeding. Kenya passed a law requiring employers all over the country to secure breastfeeding-friendly workplaces by establishing lactation rooms. However, compliance with the law is extremely low. This project aims to i) test solutions to increase compliance with the law by providing information and monetary incentives as well as giving symbolic mandates to committees created for the purpose, ii) compare the effectiveness of mixed-gender versus only-women committees in the creation of women-friendly workplaces, and iii) study the effect of lactation rooms on behaviors and norms around breastfeeding, women’s labor market outcomes (e.g., working hours, productivity) and wellbeing. The project will shed light on the barriers to the establishment of family-friendly policies in the workplace, and possible levers that can help remove them.
External Link(s)

Registration Citation

Citation
Delfino, Alexia and Stefano Fiorin. 2026. "Friendly workplaces for working mothers: Do lactation rooms promote women’s labor force participation, productivity and breastfeeding? And how do we encourage organizations to create them?." AEA RCT Registry. May 26. https://doi.org/10.1257/rct.11380-1.2
Sponsors & Partners

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Experimental Details

Interventions

Intervention(s)
Our intervention consists of a bundle of monetary incentives, informational sessions and consensus-building activities within schools to encourage them to create a lactation space and adopt a breastfeeding policy.
We will provide schools with monetary incentives for the specific purpose of creating lactation spaces. These grants will be disbursed only once a detailed proposal to establish a lactation space is submitted, and its feasibility is approved by our implementing partner. Informational sessions entail a one-hour meeting - to which all the school staff is invited - to increase awareness about the law which requires all employers to support working women to breastfeed at work through the arrangement of lactation spaces and creation of breastfeeding policies. The sessions will provide information on the existence of the law to all the participants, along with some practical guidelines that the school can follow to apply it. Finally, to create consensus around the new breastfeeding arrangements, we will create a committee of “champions of breastfeeding-friendly workplaces”. During the all-staff meeting, these “champions” will be given a mandate to push the lactation rooms law within their own organization as a group.


The informational sessions will be delivered by one of our implementing partners, the Kenya Association for Breastfeeding (KAB), which has long-standing expertise on implementing informational campaigns and helping mothers reconcile breastfeeding and work. Specifically, we will hold an all-staff meeting in each school, which will be conducted by KAB members and will consist of three parts:
1) Following some standardized scripts and structure, the KAB team will inform participants about the law, provide suggestions on how to best design lactation rooms, give practical tips on usage for mothers and split the participants into groups for brainstorming about the topic.
2) Moreover, the committee of “champions” will be nominated. This will happen in front of all the attendants during the meeting, so that other employees will be aware of the identity and role of the new champions, and that champions will feel publicly invested in their new responsibilities.
3) Finally, a voucher for 50,000 KSH will be given to the committee as a reminder of the availability of money for the initiative, which they can redeem by submitting a detailed proposal.

We further explore whether the composition of our committees matters by varying whether “champions” are only women or a mixed-gender group.
The exact identity of champions will be determined in the baseline survey, where we will get a list of “potential champions”, who are people deemed by some of their peers to be fit for voicing the employees’ needs and who are available to have this role. We will pick 4 of them to be part of our group of champions and following the specific gender composition of the treatment.
Intervention Start Date
2024-02-05
Intervention End Date
2024-03-29

Primary Outcomes

Primary Outcomes (end points)
We plan to measure the effect of our intervention on schools’ compliance with the lactation spaces law by measuring the establishment of a lactation space and adoption of a lactation policy.

We plan to measure the effect of our intervention on teachers’ outcomes by measuring demand, attitudes, and beliefs about breastfeeding-related and family-friendly workplace policies, work satisfaction, relationship with colleagues, and well-being.

We will measure in the mid to longer term the effect of having established lactation spaces and policies on teachers’ outcome by measuring breastfeeding, work behavior (e.g., absences, working hours, productivity) and turnover.

More details on the exact outcomes and their construction will be registered at a later stage, as they also depend on fundraising.
Primary Outcomes (explanation)
More specifically, we have a few different ways of measuring the establishment of a space.
1) Decision to establish. This will be measured at the end of August 2024, and can take two forms: schools can either decide to design their own lactation space, or can decide to purchase a mobile unit from our partner NGO. We measure this through the administrative records of our partner NGOs, who ask the schools to fill out forms in either case.
2) Mode of establishment. We will define two separate variables to distinguish between the design of an own lactation space and the decision to purchase a mobile unit from our partner NGO.
3) Effective establishment. This will be measured in endline visits or trough photographic proof of establishment.

We will also measure schools’ adoption of lactation policies and related practices. First, we ask the headteacher whether the school has a lactation policy. Second, we ask teachers whether they are oriented, when they start working at the school, on which space they can use for breastfeeding or expressing milk and on the rules about breastfeeding and expressing milk during working hours. Third, we also ask them whether there is an agreement between mothers and the head teacher regarding break time to breastfeed or express milk.


Teacher-level outcomes will be measured through teacher surveys administered at baseline and endline.

Primary teacher outcomes include the following families:

1. Demand, attitudes, and beliefs towards breastfeeding-related policies

For demand, we will capture teachers’ revealed and stated demand for breastfeeding-related workplace accommodations. Measures include willingness to contribute resources toward the establishment of lactation spaces, expressed support for workplace breastfeeding amenities, and prioritization of breastfeeding-related investments relative to other school expenditures.

We will construct a standardized demand index combining survey items related to willingness to financially contribute to lactation spaces; support for allocating school resources toward breastfeeding accommodations; stated prioritization of lactation spaces relative to alternative expenditures; and perceived importance of breastfeeding-related workplace policies. Higher values correspond to greater demand for breastfeeding-related workplace accommodations.

For attitudes, we will measure teachers’ attitudes regarding breastfeeding-friendly schools. Survey items capture agreement with statements regarding the respondent’s support for the establishment of lactation spaces. Higher values correspond to more favorable attitudes toward breastfeeding-related accommodations.

For beliefs, we will capture teachers’ beliefs about the social and professional consequences of breastfeeding accommodations in schools. Survey items measure perceptions regarding beneficiaries’ and their spouses’ reactions, expected effects of lactation rooms and breastfeeding policies on teachers’ breastfeeding at school, absenteeism, motivation or performance, fertility, and willingness to work in such schools, and concerns about breastfeeding in professional settings, including reservations about using lactation spaces and workplace taboos around discussing breastfeeding. Items will be coded such that higher values correspond to more supportive beliefs.

2. This outcome family measures broader demand for, attitudes toward, and perceptions of family-friendly work environments.

For demand, we will capture the importance that teachers give to flexible working arrangements and/or crèches at the workplace, as well as their likelihood of mentioning other family-friendly workplace policies as priorities for investment in the school.

For attitudes, survey items capture agreement with statements regarding the respondent’s support for the provision of flexible working arrangements and/or crèches at the workplace. Higher values correspond to more favorable attitudes toward these other family-friendly workplace policies.

For beliefs about other family-friendly workplace policies, we will measure respondents’ expectations about the effects of flexible working arrangements and/or crèches at the workplace on teachers’ absenteeism, motivation or performance, fertility, and willingness to work in such schools.

3. Work satisfaction

We measure teachers’ satisfaction with their work, whether they would recommend the workplace as a great place to work, how satisfied they are with the facilities at the workplace, and how long they plan to work in the school.

4. Relationship with colleagues

This outcome family captures teachers’ perceptions of and satisfaction with workplace relationships and collegiality within the school environment. Survey items measure overall satisfaction with relationships among colleagues, trust in coworkers and school management, perceptions of interpersonal tensions or disagreements within the school, and expectations of mutual support among colleagues during periods of personal or family-related need. Higher values correspond to more positive workplace relationships, greater trust, and stronger perceived collegial support.

5. Well-being

We ask about life satisfaction in general.

6. Breastfeeding

In the endline, we ask teachers with children born in the past two years to report a detailed history of their breastfeeding behavior, at home and at the workplace, whether it corresponded to their preferences, and whether they had any negative experiences at work. We also have more general questions for all teachers about how supportive of breastfeeding they think their place of employment is and whether mothers breastfeed or express milk during working hours.

7. Work behavior

Our endline survey will also be used to look at some proxies for outcomes related to work behavior, including absences, working hours, productivity, and turnover. However, we aim to collect administrative data on these outcomes for more precise estimates.

Here are the ways in which we will use the surveys to measure work behavior:

Working time: We ask teachers to report how many days and hours they work each week.

Absenteeism: We ask teachers to report their absence days in the last six months, as well as absence days in the first three months after coming back from maternity leave or after having a child, for respondents to whom this applies. We also have school-level absenteeism proxies reported by the head teacher, for the school as a whole.

Productivity: We ask an attention scale, an adapted version of the Adult ADHD Self-Report Scale (ASRS), which allows us to measure self-reported attention in a work setting in the last three months or, for those who came back from leave, their attention after coming back. This is a self-reported proxy of productivity. We also ask female teachers with children younger than two to read a short text and correct any typos or grammatical mistakes. We will measure productivity as the share of typos correctly found.

Turnover: We will compare the list of teachers present at school at baseline and endline, according to our listing data. We will also ask the head teacher for the number of teachers who left or joined the school in the past year. This comparison and these questions will give us noisy measures of turnover at the school level, and potentially by gender.


For each family of outcomes, we will construct standardized indices following Kling et al. (2007). Specifically, each survey item will be coded so that higher values correspond to better outcomes or greater support for breastfeeding-related policies; items will be standardized using the control-group mean and standard deviation; and the index will be computed as the unweighted average of standardized items within each outcome family.

If some index components are missing, the index will be computed using the average of available non-missing components, provided at least half of the components are observed.


Heterogeneity of treatment effects: among other heterogeneity exercises, we will look at heterogeneity by distance to childcare centers, by school management practices, and by the presence of electricity and other infrastructure at school at baseline.

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
All the schools randomized into treatment will get our partner’s information session and committee creation.

We will further randomize two treatments:
Whether schools also get monetary incentives for the creation of a lactation room;
The composition of the committee in charge of making the school a “breastfeeding friendly” workplace. The committee may be made of female employees only or mixed-gender employees, and will exclude the headteachers.

The control group will not get any intervention, only data collection.
Experimental Design Details
Not available
Randomization Method
Randomization done in the office using Stata.
Randomization Unit
Randomization will be at the school level.
Stratification variables will be: subcounty, type of school (primary or secondary, private or public) and whether the school is located close to a kindergarten.
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
300 schools
Sample size: planned number of observations
We surveyed 10 teachers in each school at baseline, for a total of 3,000 teachers. We will survey 7 teachers in each school at endline, for a total of 2,100 teachers. The participants to our intervention are a lot more as the average number of teachers per school is 24. In total, we have a sample of about 7250 teachers.
Sample size (or number of clusters) by treatment arms
Control Group: 99 schools
Meeting + Money: 99 schools (of which 51 Female Only and 48 Mixed-Gender Committees)
Meeting Only: 102 schools (of which 52 Female Only and 50 Mixed-Gender Committees)
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
Maseno University Ethics Review Committee (MUERC)
IRB Approval Date
2022-02-21
IRB Approval Number
MSU/DRPI/MUERC/01057/22