John Joseph Horton

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Online labor markets have great potential as platforms for conducting experiments. They provide immediate access to a large and diverse subject pool, and allow researchers to control the experimental context. Online experiments, we show, can be just as valid—both internally and externally—as laboratory and field experiments, while often requiring far less(More)
This paper reports the results of a natural field experiment where workers from a paid crowdsourcing environment selfselect into tasks and are presumed to have limited attention. In our experiment, workers labeled any of six pictures from a 2 x 3 grid of thumbnail images. In the absence of any incentives, workers exhibit a strong default bias and tend to(More)
Average public feedback scores given to sellers have increased strongly over time in an online labor market. Changes in marketplace composition or improved seller performance cannot fully explain this trend. We propose that two factors inflated reputations: (1) it costs more to give bad feedback than good feedback and (2) this cost to raters is increasing(More)
Preschool age children's class inclusion task responses were modeled as mixtures of different probability distributions. The main idea: Different response strategies are equivalent to different probability distributions. A child displays cognitive strategy s if P (child uses strategy s, given the child's observed score X = x) = p(s) is the most probable(More)
In recent years, a number of online labor markets have emerged that allow workers from around the world to sell their labor to an equally global pool of buyers. The creators of these markets play the role of labor market intermediary by providing institutional support and remedying informational asymmetries. In this paper, I explore market creators’ choices(More)
This paper reports the results of a series of field experiments designed to investigate how peer effects operate in a real work setting. Workers were hired from an online labor market to perform an image-labeling task and, in some cases, to evaluate the work product of other workers. These evaluations had financial consequences for both the evaluating(More)
Firms posting job openings in an online labor market were randomly assigned minimum hourly wages. When facing a minimumwage, fewer firms made a hire, but those workers they did hire were paid a higher wage. However, the reduction in hiring was not large, even at the highest minimum wage imposed. In contrast, minimumwages substantially reduced hours-worked,(More)
Using data from an online labor market, I show that buyers inefficiently pursue oversubscribed sellers. Although oversubscribed sellers are positively selected, this fact alone cannot account for the amount of attention they receive. "Excess" buyer attention is caused by an information asymmetry: buyers do not know seller capacities and cannot condition(More)