A lot of rationalist thinking about ethics and economy assumes we have very well defined utility functions - knowing exactly our preferences between states and events, not only being able to compare them (I prefer X to Y), but assigning precise numbers to every combinations of them (p% chance of X equals q% chance of Y). Because everyone wants more money, you should theoretically even be able to assign exact numerical values to positive outcomes in your life.
I did a small experiment of making a list of things I wanted, and giving them point value. I must say this experiment ended up in a failure - thinking "If I had X, would I take Y instead", and "If I had Y, would I take X instead" very often resulted in a pair of "No"s. Even thinking about multiple Xs/Ys for one Y/X usually led me to deciding they're really incomparable. Outcomes related to similar subject were relatively comparable, those in different areas in life were usually not.
I finally decided on some vague numbers and evaluated the results two months later. My success on some fields was really big, on other fields not at all, and the only thing that was clear was that numbers I assigned were completely wrong.
This leads me to two possible conclusions:
- I don't know how to draw utility functions, but they are a good model of my preferences, and I could learn how to do it.
- Utility functions are really bad match for human preferences, and one of the major premises we accept is wrong.
Anybody else tried assigning numeric values to different outcomes outside very narrow subject matter? Have you succeeded and want to share some pointers? Or failed and want to share some thought on that?
I understand that details of many utility functions will be highly personal, but if you can share your successful ones, that would be great.
I didn't answer this because it's predicated on an assumption that has no origin in the conversation. I never claimed that it was "important" for me to consider this non-universal. As per being "liberal in what I accept" in the realm of communication, I tried to answer the nearest meaningful question I thought you might actually be asking. I thought the phrase "If you're asking why I'm bringing up universality" made my confusion sufficiently clear.
If you really do mean to ask me why I think it's important that I believe in some property of preference formation, then either I've said something fairly obvious to that end that I'm not remembering (or finding), or you're asserting your own inferences as the basis of a question, instead of its substance. I try to give people the benefit of the doubt that I've misunderstood them in such cases, rather than just assume they're speaking manipulatively.
No particular value in mind. I suppose the greatest value would be in you solidly refuting such exceptions in a way that made sense to me, as that would be a more surprising (therefore more informative) outcome. If you the concede the exception, I don't gain any additional insight, so that's of fairly neutral value.
Not really sure yet, especially in the "no" case (since in that case you may have reasons I haven't yet thought of or understood). I suppose in the "yes" case I'd have greater confidence that I knew what you were talking about if I encountered similar concepts in your comments elsewhere. This discussion has had some difference on my thinking: I don't think I understood the thrust of your point when I originally complained that your distinction lacked relevance.
By strict conclusion, I mean "preferences are modeled strictly in terms of the map: it is logically impossible to a hold preference expressed in terms of something other than that which is expressed in the map". This seems very nearly true, but vulnerable to counterexamples when taken as a general principle or logical result of some other general principle. I'll elaborate if you'd like, but I thought I'd clarify that you meant it that way. If you didn't, theoretical or speculative counter-examples aren't particularly relevant.
I can imagine tha... (read more)