Prioritisation is mostly about working out how to trade different resources off against one another. Prioritisation problems come at different scales: for individuals, for companies or organisations, for the world at large. At the Global Priorities Project we’re mostly interested in the large-scale questions. But we sometimes have something to say about smaller scale problems, too.

I’ve just tidied and released old research notes (mostly from 2013) on the personal prioritisation problem of how to value time spent on different activities. This is primarily of use for individuals making decisions about how to spend their time, money, and mental energy.

Abstract: We get lots of opportunities to convert between time and money, and it’s hard to know which ones to take, since they use up other mental resources. I introduce the neutral hour as a tool for thinking about how to make these comparisons. A neutral hour is an hour spent where your mental energy is the same level at the start and the end. I work through some examples of how to use this tool, look at implications for some common scenarios, and explore the theory behind them.

There may be benefits for broader prioritisation questions. Since societies are comprised of individuals, it could help to know how to value time savings or costs to individuals when performing cost-benefit analysis on larger projects. And there may be techniques for comparing between different resources that we could usefully apply in wider contexts. However we think these benefits are secondary. We’re releasing this work now to let others take advantage of it: either for personal benefit; or to build on it and release easier-to-use guidance or tools.

You can find the full document here. I'm happy to answer questions and I'd love to know if people have thoughts on this material.

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This is brilliant, thank you Owen. One of those really useful but apparently obvious things you wonder why you never thought of - but then you've extended it in some quite wonderful ways: I particularly like that if you're starting on a high in terms of clarity / mental energy - whatever you do will be more costly in terms of lost energy on average as this is a hard state to maintain: so, rather than feeling like you can take on the world and blasting through whatever, its really important to recognize the impermanence and the temporal nature of that state.

Potential extension: how to think about things that affect your baseline energy levels over a longer time frame - I don't seem to find this as intuitive as direct comparisons as I'm unsure how to value an additional x% effectiveness or energy across all activities + the enjoyment I and others get from it + the change in the types of decisions made as a result in practical terms. I think that this uncertainty means I end up neglecting things at this level. E.G. I know that from past experience meditation done every day greatly increases my energy, rationality, sense, clarity etc. but I find it hard to prioritise this as there's always something else to do with clear value.

A potential application: pain or disease management. There's already an intuitive approach to this http://www.lupus.org.uk/patients-stories/111-the-spoons-theory But helping people to understand the comparative costs in terms of biological / psychological burden when they're planning and making decisions about their day, and taking the stress out of this where possible, would be valuable to do. Might be worth a conversation about how to take this forward with pain management people?

Great comments.

Potential extension: how to think about things that affect your baseline energy levels over a longer time frame

This would certainly be useful. You can frame it as changing the neutral time costs of different activities, but I don't know if that's helpful. It might be that it's more appropriate to use a different framework to evaluate these things, but I'll think about it some more. Let us know if you have any extra insights on this!

A potential application: pain or disease management.

Yeah, this is interesting. I think it's potentially quite applicable here, but the question is whether it's easy enough to use. Let's chat about it in person.

Thanks Owen - the only insight I have is that it seems to be complicated re: baseline energy levels over a longer time frame - this might well be because I just don't have a good model for what's going on!! (Also partly related to attitude and social support/prestige for what you're doing? Or it might be that I'm a particularly fickle individual!!)

This is very interesting. However, I suspect that for many people, the percentage of time required to recharge is not that large. For instance, many people work 50 or 60 hours a week. And even when they are not working, they might be mostly doing things that would not be considered recharging, like housework or commuting. My personal recharge percentage might only be around 5%. So I might be biased, but I would guess it would typically be around 20%, at least for people who are motivated like effective altruists. As for the question about whether timesaving interventions are worth it, I have done a lot of calculations for my own personal decisions. To my surprise, I found that many things make sense even if you value your time at order of magnitude 1 dollar per hour or less. They include things like dishwasher (you can get a countertop version if you are in a single person household), having laundry in your apartment (you can get a combination washer dryer that uses a standard outlet-this actually saves you money even when you count the increase in rent due to the lost square footage), having a second monitor, using voice recognition software (this is one of the biggest timesaving interventions), using a hands-free phone so you can do housework while on the phone, having a wireless headset so you can listen to things like TED talks while grooming, etc.