Ride-hailing apps usually match more efficiently than taxis, but they can enter a failure mode anticipated by Arnott (1996) that we call wild goose chases. High demand depletes the platform of idle drivers, so cars must be sent to pick up distant customers. Time wasted on pick-ups decreases...

Web3 today centers around expressing transferable, financialized assets, rather than encoding social relationships of trust. Yet many core economic activities—such as uncollateralized lending and building personal brands—are built on persistent, non-transferable relationships. In this paper,...

In an economy with indivisible goods, a continuum of agents and quasilinear utility, we show that equilibrium exists regardless of the nature of agents' preferences over bundles. This contrasts with results for economies with a finite number of agents, which require restrictions on preferences...