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Randomization is a common feature of everyday resource allocation. We generalize the theory of randomized assignment to accommodate various real-world constraints such as group-specific quotas (“contr...
Consumer auctions were very popular in the early days of internet commerce, but today online sellers mostly use posted prices. Data from eBay shows that compositional shifts in the items being sold,...
I examine the processes and mechanisms whereby market demand for a "dying" technology re-emerges at a later date. In 1983, fourteen years after the introduction of the first quartz watch, mechanical w...

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