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Temperature, Incentives, Productivity and Cognitive Performance
Last registered on March 14, 2018

Pre-Trial

Trial Information
General Information
Title
Temperature, Incentives, Productivity and Cognitive Performance
RCT ID
AEARCTR-0002778
Initial registration date
March 12, 2018
Last updated
March 14, 2018 4:27 PM EDT
Location(s)
Region
Primary Investigator
Affiliation
UCSD
Other Primary Investigator(s)
PI Affiliation
The Nature Conservancy
Additional Trial Information
Status
Completed
Start date
2017-09-27
End date
2017-11-04
Secondary IDs
Abstract
In this experiment, we seek to understand the effects of temperature on productivity and cognitive effects under different piece-rate wage regimes in rural forest dwelling communities in Indonesia. The objective of this study is to (1) understand how ambient temperature affects core body temperature and subsequently productivity, (2) examine how incentives affect that relationship, and (3) test the cognitive impacts of the temperature, incentive, and environment relationship. Participants were asked to conduct a repetitive, generalizable task for 90 minutes while wearing a variety of sensors that measured their movement, heart rate, and core body temperatures. A separate set of sensors also collected objective data on environmental conditions (e.g., relative humidity, Heat Index/Humidex, wet bulb and globe temperature, dry bulb temperature). Participants are assigned to one of four conditions from a 2x2 factorial design. The two factors are the activity setting (open area vs. forested area) and the incentive type (standard pay vs. high pay [two times standard pay]). We answer (1) by using minute by minute variation in environmental conditions and core body temperature and its impact on productivity (and breaks). For questions (2) and (3) we will employ a 2x2 factorial design. This trial is being registered after the completion of the study but before the investigators have had any access to the data.
External Link(s)
Registration Citation
Citation
Garg, Teevrat and Yuta Masuda. 2018. "Temperature, Incentives, Productivity and Cognitive Performance." AEA RCT Registry. March 14. https://doi.org/10.1257/rct.2778-1.0.
Former Citation
Garg, Teevrat, Teevrat Garg and Yuta Masuda. 2018. "Temperature, Incentives, Productivity and Cognitive Performance." AEA RCT Registry. March 14. http://www.socialscienceregistry.org/trials/2778/history/26607.
Experimental Details
Interventions
Intervention(s)
We use a 2x2 factorial design where tasks are completed in forested and non-forested areas with low and high incentives, generating four separate groups. We sample a random subset of households in each village in our study area. There are two treatments - a) assignment to low (forested) and high (non-forested) temperature settings and b) piece-wise wage incentives - baseline and a higher incentive (twice the baseline). The first treatment is randomized at the village-day level where the sample from each village is divided between low and high temperature settings. The second treatment is randomized at the individual level.
Intervention Start Date
2017-10-01
Intervention End Date
2017-11-04
Primary Outcomes
Primary Outcomes (end points)
We will measure two sets of outcomes: a) the main outcome, productivity (measured as number of units produced per unit time) and cognitive assessment scores, and b) the intermediate outcomes (total active time, heart rate, activity count).
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
We use a 2x2 factorial design where tasks are completed in forested and non-forested areas with low and high incentives, generating four separate groups. We sample a random subset of households in each village in our study area. There are two treatments - a) assignment to low (forested) and high (non-forested) temperature settings and b) piece-wise wage incentives - baseline and a higher incentive (twice the baseline). The first treatment is randomized at the village-day level where the sample from each village is divided between low and high temperature settings. The second treatment is randomized at the individual level.
Experimental Design Details
For our main outcomes we will estimate the following: a) Effect of temperature setting on productivity and cognition (OLS). b) Effect of wage regime on productivity and cognition (OLS.) c) Effect of wet bulb globe temperature (WBGT) on the main outcomes using temperature setting as an instrument for WBGT. d) A difference in difference design to estimate the differential effect of the two different wage regimes under the high and low temperature settings on the main outcomes.
Randomization Method
Randomization done in office by a computer
Randomization Unit
Intervention one: village-day level
Intervention two: individual level
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
N/A
Sample size: planned number of observations
400 individuals. The yield was 363 individuals.
Sample size (or number of clusters) by treatment arms
For each of the following arms, we had planned on 100 individuals. The numbers below show the actual yield.
Forest setting, regular incentive: 98
Forest setting, higher incentive: 91
Non-Forest setting, regular incentive: 87
Non-Forest setting, higher incentive: 87
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
University of Washington Human Subjects Division
IRB Approval Date
2017-09-26
IRB Approval Number
FWA #00006878
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