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scientificamerican.com

How a space rock vanished from Africa and showed up for sale across an ocean

arxiv.org

A system of non-tradable credits that flow between individuals like karma, hence proposed under that name, is a mechanism for repeated resource allocation that comes with attractive efficiency and fairness properties, in theory. In this study, we test karma in an online experiment in which human subjects repeatedly compete for a resource with time-varying and stochastic individual preferences or urgency to acquire the resource. We confirm that karma has significant and sustained welfare benefits even in a population with no prior training. We identify mechanism usage in contexts with sporadic high urgency, more so than with frequent moderate urgency, and implemented as a simple (binary) karma bidding scheme as particularly effective for welfare improvements: relatively larger aggregate efficiency gains are realized that are (almost) Pareto superior. These findings provide guidance for further testing and for future implementation plans of such mechanisms in the real world.

nautil.us

We recently launched a new version of the Nautilus website. If you’re an existing subscriber, your subscription remains active—you simply need to set up your account to access member features online. How to setup your account for the first time Once logged in, you’ll typically remain logged in for about 30 days. If you’re logged…

phys.org

Daily science news on research developments, technological breakthroughs and the latest scientific innovations

newscientist.com

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mathoverflow.net

Q&A for professional mathematicians

physicsworld.com

Physics World represents a key part of IOP Publishing's mission to communicate world-class research and innovation to the widest possible audience. The website forms part of the Physics World portfolio, a collection of online, digital and print information services for the global scientific community.

scitechdaily.com

Science, Space and Technology News 2026

aeon.co

Science Essays from Aeon. World-leading scientists and science writers explore topics from theories of evolution to theories of consciousness, quantum physics to deep time, chemistry to cosmology.