Field
Trial Title
|
Before
Discontinuous Labour Supply and Wage Bunching on an Online Labor Market.
|
After
Left-digit Bias in Wage Perceptions and Labor Supply in an Online Labor Market
|
Field
Abstract
|
Before
Randomize wages for census image classification task to estimate discontinuous labor supply elasticities at round numbers ( in particular at 10 cents, to test for left-digit bias). We also aim to replicate the upward sloping labor supply functions to a given task estimated in Horton et al (2011).
|
After
We randomize wages for census image classification task to estimate discontinuous labor supply elasticities at round numbers---in particular at 10 cents, to test for left-digit bias. We also aim to replicate the upward sloping labor supply functions to a given task estimated in Horton et al (2011).
|
Field
Last Published
|
Before
July 06, 2016 12:52 AM
|
After
March 01, 2017 01:32 PM
|
Field
Experimental Design (Public)
|
Before
We will post a total of 5,500 unique HITS on MTurk tasks for $0.10 that includes a brief survey and a screening task, where respondents view a digital image of a historical slave census schedule from 1850 or 1860, and answer whether they see markings in the “fugitives” column. Some respondents are offered a choice of completing an additional set of classification tasks for a specific wage.
|
After
We will post a total of 5,500 unique HITS on MTurk tasks for $0.10 that includes a brief survey and a screening task, where respondents view a digital image of a historical slave census schedule from 1850 or 1860, and answer whether they see markings in the “fugitives” column. Some respondents are offered a choice of completing an additional set of classification tasks for a specific wage.
Extension: we have also run a version of this experiment with a recipe tagging task, at 90, 99, 100, 101, and 110 cents.
|
Field
Planned Number of Clusters
|
Before
5500
|
After
5500
400 for extension
|
Field
Planned Number of Observations
|
Before
5500
|
After
5500
400 for extension
|
Field
Sample size (or number of clusters) by treatment arms
|
Before
5500
|
After
5500
400 for extension
|
Field
Intervention (Hidden)
|
Before
Randomize rate for tagging historical census images. We aim to assess the left-digit bias in wage perceptions experimentally by randomizing the offered wages for HITs on MTurk by randomizing a wage offer for a HIT to vary between $0.05 and $0.15, and assessing whether there is a jump in the acceptance probability between $0.09 and $0.10 as would be predicted by a left-digit bias.
|
After
Randomize rate for tagging historical census images. We aim to assess the left-digit bias in wage perceptions experimentally by randomizing the offered wages for HITs on MTurk by randomizing a wage offer for a HIT to vary between $0.05 and $0.15, and assessing whether there is a jump in the acceptance probability between $0.09 and $0.10 as would be predicted by a left-digit bias.
Extension: we also run a version of this experiment with a recipe tagging task, at 90, 99, 100, 101, and 110 cents. The analysis remains the same as the previous experiment.
|