Florian Habermacher

PhD in Economics (focus on applied economics and climate & resource economics in particular) & MSc in Environmental Engineering & Science. Key interests: Interface of Economics, Moral Philosophy, Policy. Public finance, incl. optimal redistribution & tax competition. Evolution. Consciousness. AI/ML/Optimization. Debunking bad Statistics & Theories. Earn my living in energy economics & finance and by writing simulation models.

Wiki Contributions


Give in Public Beta is live

What about this to reduce the pbly often overwhelming stigma attached to showcasing one's own donations?!

  1. Maybe the main issue is that I'm showing off with the amount I donate, rather than towards which causes. So: Just show where to, or maybe which share to where I donate, avoiding to show the absolute amount of donations.
  2. Ok, so you do your donations, I do some other donations. But: You showcase my donations, I showcase yours. No clue whether that's stupid and not much better than simply not showing any personal donations. Maybe then, a bunch of us are donating to whatever each of us likes, but each of us simply showcases  the group's aggregate donations: "Hey, I'm in this group of five and it donated these amounts to here and here; I gave only a small share, but you could participate in sth similar".
Florian Habermacher's Shortform

Research vegan cat food as ideal EA cause!? Might also be ideal for human vegan future as 'side'-effect too.

  1. Cats are obligate carnivores; must eat meat (or animal products) according to typical recommendations (and cats tend to refuse most non-animal foods). At least, there seems to exist no vegan cat food that is recommended as a main diet for cats without further warnings; often cats would seem to not accept mostly non-animal foods
  2. I guess - but am not sure (?) - animals fed to cats mean significantly more animals are grown in factory farms
    1. Somewhat counterintuitively, in the whole cat food domain, the concept of animal welfare standards, does not even seem to exist. You can find some seemingly higher-welfare standard products but they are extremely rare
    2. Even if often large shares of the ingredients are "chicken meal", "fish meal" etc., I guess lots of this meal one way or another still could have been replacing some human foods in some places. What I have definitely seen, often major shares of ingredients in the cat foods are "meat" and not just inner organs or broth (although I cannot exclude that 'meal'-based ones may dominate total sales volumes)
    3. I guess we're pretty good feed all sorts of animal pieces to (i) ourselves in sausages, chicken nuggets, and the like and/or (ii) other food industry animals. So my prior is that cats do not only get stuff that is completely redundant in the food industry.
  3. I calculate* (very rough) for ca. 220 mio. house cats worldwide, and considering 50% of their meat food to correspond to extra meat production, 6 600 ton/day quality-adjusted meat consumption, or around 0.9% of human's meat consumption.
  4. The few articles I read online about to which degree cats require a meat diet, point mainly to elements that sound like those that we can easily mix/synthesise from non-animal foods and chemical processes (Taurine, Vitamins A, Arginine, Niacin, maybe some other fatty/amino-acids)
    1. Oddly, the pages tend to list these few elements, insisting that therefore the cat must eat meat, while I'd think: "Euhm, if it's just that, it would seem simple to mix the right thing" => maybe the pages just do not enter into more subtle details that are crucial for an obligate carnivore
  5. IMHO, we could very easily test out food/supplements mixtures to check how easily one can replace which share of meat for cats without impairing their health. Given the billions of factory animal lives at stake, even some risk for the corresponding "test animals" might be completely justifiable in the worst case, and naive me thinks we might make extremely quick progress on this front if we really want
  6. If we nail this, the positive side-effects could be: "Hey look, they even feed the obligate carnivores with this mix nowadays, surely you can also become vegan with zero hesitation with a human adjusted formula!" - i.e. finally the stories of your vegan friend who end up at the doctor who recommends him to eat meat (!) etc. could finally really be stories only of the past. (I know many think it already is; maybe you're right; but I know in practice at least for many this is simply not how they see it)
  7. In fact, for each of (i) the cat-not-eating animals, and (ii) side-effect for human diet, I'd not be surprised if expediently trying to get vegan food that even cats can eat, would be justified

EA dietitians, am I just naive or could this be a thing?

I reckon one drawback of an ideal vegan cat diet could be that many more might want to keep cats. I see some possibilities on net impact from cats+food directly then:

  1. Only few more cats: lower net animal consumption and lower net land-use and lower food costs for poor people (and for cat holders)
  2. Much more cats: vegan diet more than offsetting the spared animal food industry footprint, i.e. larger net land-use change for agriculture, higher food prices for poor

Whether house cats are at all net "happy" or not, I do not know.

* Calculation, based on rough values:
220 mio domestic cats (ignoring 480 mio stray)
3 kg avg. weight (might be slightly low side)
2% of cat weight meat food/day
=60g/cat daily meat = 30g/cat daily "extra" animal meat if quality-adjusting with 50% (see text above)
=6 600 t/day extra meat production

And with approx. 90g meat/day per human (beef veal pork poultry and sheep acc. to OECD) for the 8 bn humans, i.e. with 750 000 t meat/day human consumption, the cat's share is

= 0.9%, bit simplistically approximated.

Is it really that a good idea to increase tax deductibility ?

Great question!

  1. Achieving a direct matching by the gvmt (even if it would be only with, say, a +25% match-factor or so, to keep it roughly in line with what tax-deductability means), instead of tax deductability, could indeed be more just, removing the bias you mention that unnecessarily favors the rich. Spot on imho.
  2. That said, democracies seem to love "tax deductability": stealing from the state that feels a bit less like stealing. So, deductability can be the single mostly easily acceptable policy. If so, it might pragmatically be worthwhile to support it, despite the negative redistributional consequence just mentioned.
  3. The best action might be to try to set up local EA charities that can easily get certified for tax deductability in Belgium, and use the money either directly to support the intl EA organizations, or, if that is difficult, then in the worst case simply to support similar work in parallel (?).
  4. Mostly independently of 1. vs. 2., whether the (donation elasticity-adjusted) average donation is more effective than gvmt tax collection (or reducing standard gvmt tax burden*), feels difficult to say, and will depend a lot on how much you value different types of social goods. Atm, most donations will not be EA type donations, but one might expect people to give to causes often significantly better than for tax revenues, so I'd personally rather err towards the pro-deduct (or pro-match) side so far.

*It would be wrong to consider only 'tax revenue lost' for the gvmt as effect of the tax deductability. In expectation, in a simple model, gvmt will in the medium term partly respond with (i) lower expenditures, and (ii) increase standard tax rates in response to higher tax deductions. 

Btw, I personally would not worry about the €25 threshold. Avoiding to register/count too small sums seems a reasonable thing, even if you're right that it becomes less relevant in the digital world.

Incentivizing Donations through Mutual Matching

From what I read, Snowdrift is not quite "doing this", at least not in as far as the main aim here in Mutual Matching is to ask more from a participant only if leverage increases! But there are close links, thanks for pointing out the great project!

Snowdrift has people contribute as an increasing function of the # of co-donors, but the leverage, which is implicit, stays constant = 2, always (except for those cases where it even declines if others' chosen upper bounds are being surpassed), if my quick calculation is right (pretty sure*). This may or may not be a good idea with +- rational contributors (either way, I btw think it would be valuable for transparency to indicate this leverage explicitly to readers of the snowdrift page, it's a crucial factor for donors imho). Pragmatically it may turn out to be a really useful simplification though.

Here instead, Mutual Matching tries to motivate people by ensuring that they donate more only as leverage really increases. I see this as key innovation also relative to Buchholz et al. (maybe worth looking at that paper, it might be closer to snowdrift, as it also does not make donations directly conditional on leverage I think, tbc). As I discuss, this has pros and cons; the main risk being that the requested donation increases quickly with the leverage and thus with the # of participants.

Thanks to your links I just saw also the Rational Street Performer Protocol, which I should also look at, even if it equally seems to focus on donating more as more is given in total, rather than like here explicitly as leverage is increased; it makes the timing question very explicit, which is a dimension I have here not much looked at yet.

Will expand the text & make the connections to both asap!

*snowdrift: Each gives 0.1 ct per participant, meaning for 1000 (or 5000) you give 1$ (or 5$) and thanks to you all these others give 1$ (or $5) more in total than without you, i.e. extra leverage of constantly 1 in addition to your own contribution itself, meaning total leverage of your contribution = 2 always.

Incentivizing Donations through Mutual Matching

You're right. I see two situations here:

(i) the project has a strict upper limit on funding required. In this case, if you must (a) limit the pool of participants, and/or (b) their allowed contribution scales, and/or (c) maybe indeed the leverage progression, meaning you might incentivize people less strongly.

(ii) the project has strongly decreasing 'utility'-returns for additional money (at some point). In this case, (a), (b), (c) from above may be used, or in theory you as organizer could simply not care: your funding collection leverage still applies, but you let donors judge whether they find they discount the leverage for large contributions, as they judge the value of the money being less valuable on the upper tail; they may then accordingly decide to not contribute, or to contribute with less.

Finally, there is simply the possibility to use a cutoff point, above which the scheme simply must be cancelled, to address the issue that you raise, or the one I discuss in the text: to prevent individual donors to have to contribute excessive amounts, when more than expected commitments are received. If that cutoff point is high enough so that it is unlikely enough to be reached, you as organizer may be happy to accept it. Of course one could then think about dynamics, e.g. cooling-off period before you can re-run the cancelled collection, without indirectly (too strongly) undermining the true marginal effect in a far-sighted assessment of the entire situation.

In reality: I fear even with this scheme, if in some cases it hopefully turns to be practical, many public goods problems remain underfunded (hopefully simply a bit less strongly) rather than overfunded, so, I'm so far not too worried about that one.

What EA projects could grow to become megaprojects, eventually spending $100m per year?

Agree with the "easily tens of millions a year", which, however, could also be seen to underline part of what I meant: it is really tricky to know how much we can expect from what exact effort.

I half agree with all your points, but see implicit speculative elements in them too, and hence remain with, a maybe all too obvious statement: let's consider the idea seriously, but let's also not forget that we're obviously not the first ones thinking of this, and in addition to all other uncertainties, keep in our mind that none seems to seriously have very much progress in that domain despite the possibly absolutely enormous value even private firms might have been able to make from it if they had serious progress in it.

This Can't Go On

I miss a clear definition of economic growth here, and the discussion strongly reminds me of the environmental resources focused critique of growth that has started with 1970's Club of Rome - Limits to Growth, there might be value to examine the huge literature around that topic that has been produced ever since on such topics.

Economic growth = increase in market value, is a typical definition.

Market value can increase if we paint the grey houses pink, or indeed if we design good computer games, or if we find great drugs to constantly awe use in insanely great ways without downsides. Or maybe indeed if we can duplicate/simulate brains which derive lot of value, say, literally out of thin air - and if we decide to take into account their blissful state also in our growth measure.

If we all have our basic needs met, and are rich way beyond it, willingness to pay for some new services may become extremely huge; even for the least important services - merely as we have nothing to do with our wealth, and as we're willing to pay so little on the margin for the traditional 'basic' goods who are (in my scenario assumed to be) abundant and cheaply produced.

So the quantitative long-run extent of "economic growth" then becomes a bit an arbitrary thing: economic growth potentially being huge, but the true extra value possibly being limited.

'Economic growth' may therefore be too intangible, too arbitrary a basis for discussing the nature of long-run fate of human (or what ever supersedes us) development.

Maybe we should revert back to directly discussing limits to increase in utility (as come comments here already do).

What EA projects could grow to become megaprojects, eventually spending $100m per year?

I see enormous value in it and think it should be considered seriously.

On the other hand, the huge amount of value in it is also a reason I'm skeptical about it being obvious to be achievable: there are already individual giant firms who'd internally at multi-million annual savings (not to talk about the many billions the first firm marketing something like that would immediately earn) from having a convenient simple secure stack 'for everything', yet none seems to have something close to it (though I guess many may have something like that in some sub-systems/niches). 

So just wondering whether we might underestimate the cost of development/use - despite from gut feeling strongly agreeing that it would seem like such a tractable problem.

Give in Public Beta is live

I find it a GREAT idea (have not tested it yet)!

The Harsanyi-Rawls debate: political philosophy as decision theory under uncertainty

Thank you! I was actually always surprised by H's mention of the taxation case as an example where maximin would be (readily) applicable.

IMHO, exactly what he explains in the rest of the article, can also be used to see how optimal taxation/public finance should rather only in exceptional cases be using a maximin principle as the proxy rule for a good redistributive process.

On the other hand, if you asked me whether I'd be happy if our actual very flawed tax/redistribution systems would be reformed such as to conform to the maximin - es, I'd possibly very happily agree on the latter, simply as a lesser of two evils. And maybe that's part of the point; in this case, fair enough!

Load More