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Browsing All Items by Author "Fix, Blair"
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Item Open Access A Tour of the Jevons Paradox: How Energy Efficiency Backfires(2024) Fix, BlairWhen it comes to our sustainability problems, striving for greater resource efficiency seems like an obvious solution. For example, if you buy a new car that’s twice as efficient as your old one, it should cut your gasoline use in half. And if your new computer is four times more efficient than your last one, it should cut your computer’s electric bill fourfold. In short, boosting efficiency seems like a straightforward way to reduce your use of natural resources. And for you personally, efficiency gains may do exactly that. But collectively, efficiency seems to have the opposite effect As technology gets more efficient, we tend to consume more resources. This backfire effect is known as the ‘Jevons paradox’, and it occurs for a simple reason. At a social level, efficiency is not a tool for conservation; it’s a catalyst for technological sprawl.1 Here’s how it works. As technology gets more efficient, it cheapens the service that it provides. And when services get cheaper, we tend to use more of them. Hence, efficiency ends up catalyzing greater consumption. Take the evolution of computers as an example. The first computers were room-sized machines that gulped power while doing snail-paced calculations. In contrast, modern computers deliver about a trillion times more computation for the same energy input. Now, in principle, we could have taken this trillion-fold efficiency improvement and reduced our computational energy budget by the same amount. But we didn’t. Instead, we took these efficiency gains and invested them in technological sprawl. We took more efficient computer chips and put them in everything — phones, TVs, cars, fridges, light bulbs, toasters … not to mention data centers. So rather than spur conservation, more efficient computers catalyzed the consumption of more energy. In this regard, computers are not alone. As you’ll see, efficiency backfire seems to be the rule rather than the exception. Far from delivering a cure for our sustainability woes, efficiency gains appear to be a root driver of the over-consumption disease.Item Open Access Is Bitcoin More Energy Intensive Than Mainstream Finance?(2024) Fix, BlairWhen it comes to Bitcoin, there’s one thing that almost everyone agrees on: the network sucks up a tremendous amount of energy. But from there, disagreement is the rule. For critics, Bitcoin’s thirst for energy is self-evidently bad — the equivalent of pouring gasoline in a hole and setting it on fire. But for Bitcoin advocates, the network’s energy gluttony is the necessary price of having a secure digital currency. When judging Bitcoin’s energy demands, the advocates continue, keep in mind that mainstream finance is itself no model of efficiency. Here, I think the advocates have a point. If you want to argue that Bitcoin is an energy hog, you’ve got to do more than just point at its energy budget and say ‘bad’. You’ve got to show that this budget is worse than mainstream finance. On this comparison front, there seems to be a vacuum of good information. For their part, crypto promoters are happy to show that Bitcoin uses less energy than the global banking system. But this result is as unsurprising as it is meaningless. Compared to Bitcoin, global finance operates on a vastly larger scale. So of course it uses more energy. To be meaningful, any comparison between Bitcoin and mainstream finance must account for the different scales of the two systems. So instead of looking at energy alone, we need to look at energy intensity — the energy per unit of circulating currency. That’s what I’ll do here. In this post, I compare the energy intensity of Bitcoin to the energy intensity of mainstream US finance. Which system comes out on top? The results may surprise you.