Michael E. Kummer
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View article: Chat More and Contribute Better: An Empirical Study of a Knowledge-Sharing Community
Chat More and Contribute Better: An Empirical Study of a Knowledge-Sharing Community Open
Knowledge-sharing communities face a dual challenge: they must enable efficient content generation and also provide spaces in which interpersonal bonds can form. We examine how these goals interact by studying Stack Overflow’s introduction…
View article: Unemployment and Online Labor: Evidence from Microtasking
Unemployment and Online Labor: Evidence from Microtasking Open
We analyze the relationship between unemployment and the supply of online labor for microtasking. Using detailed U.S. data from a large microtasking platform between 2011 and 2015, we study the participation and the number of hours supplie…
View article: The De Novo Doctrine: Irrelevant to Relevancy in Civil Tax Litigation
The De Novo Doctrine: Irrelevant to Relevancy in Civil Tax Litigation Open
"A tax case is a de novo proceeding and the thoughts, procedures, conclusions, reasoning, or factual findings of Internal Revenue Service employees about a taxpayer's liability are irrelevant."Any attorney who has handled a tax case on a t…
View article: Replication Data for: "Externalities in Knowledge Production: Evidence from a Randomized Field Experiment"
Replication Data for: "Externalities in Knowledge Production: Evidence from a Randomized Field Experiment" Open
The data and programs replicate tables and figures from "Externalities in Knowledge Production: Evidence from a Randomized Field Experiment", by Hinnosaar, Hinnosaar, Kummer, and Slivko. Data were constructed from various sources. Please s…
View article: Wikipedia matters
Wikipedia matters Open
We document a causal impact of online user‐generated information on real‐world economic outcomes. In particular, we conduct a randomized field experiment to test whether additional content on Wikipedia pages about cities affects tourists' …
View article: Spike-Triggered Descent
Spike-Triggered Descent Open
The characterization of neural responses to sensory stimuli is a central problem in neuroscience. Spike-triggered average (STA), an influential technique, has been used to extract optimal linear kernels in a variety of animal subjects. How…
View article: Economic downturn and volunteering: Do economic crises affect content generation on Wikipedia
Economic downturn and volunteering: Do economic crises affect content generation on Wikipedia Open
Economic restructuring provides an opportunity for socially valuable product and process innovation. However, it's not clear whether displaced workers engage in socially useful activities as well. This question is particularly pressing whe…
View article: Data for: Market structure and market performance in E-commerce
Data for: Market structure and market performance in E-commerce Open
of associated article: We analyze the interaction between market structure and market performance and how it varies over the product cycle. To account for the potential endogeneity in this relation, we use an instrumental variable approach…