I graduated from Georgetown University in December, 2021 with degrees in economics, mathematics and a philosophy minor. There, I founded and helped to lead Georgetown Effective Altruism. Over the last few years recent years, I’ve interned at the Department of the Interior, the Federal Deposit Insurance Corporation, and Nonlinear.
Blog: aaronbergman.net
I made a tool to play around with how alternatives to the 10% GWWC Pledge default norm might change:
How much individuals are “expected” to pay
The idea being that there are functions of income that people would prefer to the 10% pledge behind some relevant veil of ignorance, along the lines of “I don’t want to commit 10% of my $30k salary, but I gladly commit 20% of my $200k salary”
How much total donation revenue gets collected
There’s some discussion at this Tweet of mine
Some folks pushed back a bit, citing the following:
The pledge isn’t supposed to be revenue maximizing
A main function of the pledge is to “build the habit of giving” and complexity/higher expectations undermines this
Many pledgers give >10% - the pledge doesn’t set an upper bond
I don’t find these points very convincing...
Some points of my own
To quote myself: “I think it would be news to most GWWC pledgers that actually the main point is some indirect thing like building habits rather than getting money to effective orgs”
If the distribution of GWWC pledgers resembles the US distribution of household incomes and then cut implied donations in half to account for individual vs household discrepancy (obviously false but maybe still illustrative assumptions), the roughly 10,000 GWWC pledgers are giving $60M/year
That’s a lot of money. It matters a lot in absolute terms
This isn’t a giving game situation where a few college fellowships give $100/semester—there the main effect is indirect, not via the $100 moved. But at $60M/year, even relatively modest % increases matter a lot
The 10% GWWC pledge functions as a norm that probably has some influence over total amounts given even though folks are free to give as much (or as little, really) as they want.
The simplicity/memetic fitness of flat 10% is nice, but this has to be weighed against the actual object level consideration of how much money gets moved per year
Plausibly more folks would take a revised version of the pledge because it’s less costly at lower incomes. There’s a reason that the US income tax system is progressive!
Possibly we can have a best of both worlds situation, where the GWWC pledge remains a strong norm but there’s a different, mostly compatible system for those so inclined.
Tentatively it seems like a progressive system makes sense purely from a money moved POV. This screenshot is from the default settings, which is approximately the curve I endorse
Some design choices to make explicit
The site is supposed to be about after-tax income, which is what matters insofar as you’re open to a non-flat curve
The site accounts for exactly two variables for simplicity and convenience: (1) metro area to determine cost of living and (2) after-tax income; plenty of other things that would plausibly change the function for the better, such as family size
The default curve when you load the page is roughly what I personally endorse but I haven’t put a ton of thought into it
That is: r=0.99(1−exp(−0.15⋅ln(I/30000)1.20.99))
You can modify the parameters in a couple different ways
Why adjust for cost of living?
The actual reason I chose to do this is that I think there are altruistic benefits to living in major US cities, most notably SF/Bay Area and DC, but also others like NYC and Boston, and so don’t want to disincentivize living in those places
I realize this is not incredibly principled, maybe this is the wrong call
The site one more time
https://pledge.up.railway.app/