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Warning: Wonky 🧵 on vague energy/climate modeling ideas. Many papers I read in this field aim to compare climate mitigation scenarios or optimize mitigation pathways. The modeled transitions have lots of impacts: ⬆️ or ⬇️ deaths, illnesses, jobs, money, and so on.
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It's hard to compare or optimize pathways when there are so many different, and often competing, goals. One pathway might cost less but sicken and kill more people. Another might cost a lot but also create a ton of jobs. And so on.
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To deal with this issue, modelers usually convert all the various objectives to a single performance metric. Almost always, that metric is money.
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The conversion process involves assigning prices to the various non-monetary objectives. Creating 1 job is worth $X, avoiding 1 year of serious illness for 1 person is worth $Y, and so on. They usually value 1 human life at about $12 million.
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This is a very common move, but it's sorta bonkers. "How many job creations is a human life worth?" is just a weird-ass question to ask, yet researchers implicitly answer it all the time. The answers are of course totally subjective, but rarely discussed in much depth.
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Another approach is to rank the competing objectives by importance, then compare or optimize pathways sequentially, from most to least important. For example: First save as many lives as possible, then avoid as many person-years of illness as possible, then save as much money as possible.
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This isn't my primary research area - I mostly develop software to better operate heating/cooling equipment, EVs, batteries, etc. - so I'm not as familiar with the literature as many others are. But I've seen very few papers that take this alternative, "rank then sequentially optimize" approach.
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i'm curious what models you're using, if you have a moment, i've had some experience with GCAM and other IAMs but i'm wondering what else is out there, the topic is proximate to my field but i mainly do other things
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(new phd mech engineering, lifecycle cost modeling for floating offshore wind)