I can't see how it's theoretically possible to do a small scale experiment with UBI. If not everyone gets it, you can't see the big impact on the economy (what happens with supply/demand/inflation). And if it's with a short horizon, then people still have to plan for life after the UBI experiment. You can't give up the career you are going to need to make a living in 2 years time, just because you get paid a small su…
I am very skeptical of claims that outcomes are discontinuous in policy space. Going one step in direction A should give you information about going further in that same direction, at least on some scale of change. Clearly the people running the experiment agreed, because they designed it with the intent to get that information.
So eating healthy for 1 day/week will change your blood results and tell you that a year of it will make you lose 50 pounds?
So going to 1 day of college will make you measure differently on a test that checks critical thinking?
Different things take different amount of time to see results. I could see behaving very differently between
* This is a very temporary 1 year test of UBI *
vs
* You have a social safety net of UBI for your entire life, and can count on the income no matter what happens