I would also describe that scenario as “high confidence.” My best guess on the actual numbers is more like, the direct effect of a donation to AMF is +1 utilon, and flow-through effects are normally distributed around 100 with standard deviation 500. So it’s net positive in expectation but still has a high probability (~42% for the numbers given) of being net negative.
I appreciate that those would be your numbers, I’m just pointing out that you do actually need that high standard deviation (i.e. you need to believe that the flow through affects will likely be larger than the direct effects) in order to justify that claim. Which is what Denise was saying in the first place.
You appeared to think you could get away with allowing that flow through affects are probably smaller than direct impact and then make the much weaker claim ‘there’s a possibility that AMF has large negative flow-through effects that overwhelm its benefits’ to get to your conclusion that you can’t have high confidence in AMF being good. But I don’t think you can actually allow that; I’m fully capable of accepting that argument and still considering AMF ‘high confidence’ good.
Of course, you might just have a good argument for focusing on the flow-through effects, which would render this discussion moot.
Those seem really high flow through effects to me! £2000 saves one life, but you could easily see it doing as much good as saving 600!
How are you arriving at the figure? The argument that “if you value all times equally, the flow through effects are 99.99...% of the impact” would actually seem to show that they dominated the immediate effects much more than this. (I’m hoping there’s a reason why this observation is very misleading.) So what informal argument are you using?
I more or less made up the numbers on the spot. I expect flow-through effects to dominate direct effects, but I don’t know if I should assume that they will be astronomically bigger. The argument I’m making here is really more qualitative. In practice, I assume that AMF takes $3000 to save a life, but I don’t put much credence in the certainty of this number.
I would also describe that scenario as “high confidence.” My best guess on the actual numbers is more like, the direct effect of a donation to AMF is +1 utilon, and flow-through effects are normally distributed around 100 with standard deviation 500. So it’s net positive in expectation but still has a high probability (~42% for the numbers given) of being net negative.
I appreciate that those would be your numbers, I’m just pointing out that you do actually need that high standard deviation (i.e. you need to believe that the flow through affects will likely be larger than the direct effects) in order to justify that claim. Which is what Denise was saying in the first place.
You appeared to think you could get away with allowing that flow through affects are probably smaller than direct impact and then make the much weaker claim ‘there’s a possibility that AMF has large negative flow-through effects that overwhelm its benefits’ to get to your conclusion that you can’t have high confidence in AMF being good. But I don’t think you can actually allow that; I’m fully capable of accepting that argument and still considering AMF ‘high confidence’ good.
Of course, you might just have a good argument for focusing on the flow-through effects, which would render this discussion moot.
Those seem really high flow through effects to me! £2000 saves one life, but you could easily see it doing as much good as saving 600!
How are you arriving at the figure? The argument that “if you value all times equally, the flow through effects are 99.99...% of the impact” would actually seem to show that they dominated the immediate effects much more than this. (I’m hoping there’s a reason why this observation is very misleading.) So what informal argument are you using?
I more or less made up the numbers on the spot. I expect flow-through effects to dominate direct effects, but I don’t know if I should assume that they will be astronomically bigger. The argument I’m making here is really more qualitative. In practice, I assume that AMF takes $3000 to save a life, but I don’t put much credence in the certainty of this number.