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[Photo courtesy of NOAA.] At the end of last October, Scott Armstrong & I got a ping from Carlos Waters, a journalist and multimedia producer with Vox.com. He was working up a piece on beach nourishment. He’d come across our paper in Earth’s Future (Armstrong et al., 2016), in which we (et alia) show, using…

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Arrow’s impossibility theorem – for academics

I’m reading John Cassidy’s remarkable book How Markets Fail (2009), which includes a brief aside on economist Kenneth Arrow‘s fundamental work on “‘social’ ordering” – the problem of “converting individual preferences over a set of [possibilities]…into a consistent ordering for society as a whole” (p. 62, in Cassidy’s paperback edition). To paraphrase Cassidy’s eloquent summary,…

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