The impact of voice robot on labor supply, customer satisfaction, and firm performance

Last registered on September 14, 2023


Trial Information

General Information

The impact of voice robot on labor supply, customer satisfaction, and firm performance
Initial registration date
June 21, 2023

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
June 23, 2023, 5:22 PM EDT

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

Last updated
September 14, 2023, 7:52 AM EDT

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



Primary Investigator

Tsinghua University

Other Primary Investigator(s)

PI Affiliation
Shanghai University of Finance and Economics
PI Affiliation
Tsinghua University
PI Affiliation
University of Michigan

Additional Trial Information

On going
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
In this project, we tend to investigate the impact of service robot on employee's labor supply, customers' satisfaction, as well as firm performance. We conduct the RCT in a hotel in Shanghai, China. We randomly select roughly 50% of the rooms in this hotel, and then we intall a voice robot in the room. This voice robot can finish many tasks which the customers used to rely on the help from hotel staffs. We already started to collect relevant data before the installment of the voice robot. We will also plan to collect data after the installment of the voice robot. Using the detailed data we collect, we can then investigate the impact of the voice robot on different outcome variables.
External Link(s)

Registration Citation

Ge, Run et al. 2023. "The impact of voice robot on labor supply, customer satisfaction, and firm performance." AEA RCT Registry. September 14.
Experimental Details


We randomly select some (roughly 50%) rooms in the hotel and then install the voice robot.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Labor supply of hotel staffs; customers' satisfaction; hotel performance; others
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Our experiment is conducted in a hotel located in Shanghai, China. By each type and in each floor, we randomly select roughly 50% of the rooms. And then we install the voice robot in these rooms, which can be used by the customers.
Experimental Design Details
Randomization Method
Randomization done in office by a computer based on the hotel blueprint provided by the hotel.
Randomization Unit
Rooms in the hotel.
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
154 rooms
Sample size: planned number of observations
154 rooms, we planned to collect data two months before the installment and two months after the installment. The number of observations depends on the number of customers staying in the room during this period.
Sample size (or number of clusters) by treatment arms
76 rooms treatment, 68 rooms control.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
The Review Board of School of Economics and Management in Tsinghua University
IRB Approval Date
IRB Approval Number


Post Trial Information

Study Withdrawal

There is information in this trial unavailable to the public. Use the button below to request access.

Request Information


Is the intervention completed?
Data Collection Complete
Data Publication

Data Publication

Is public data available?

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials