The Bottom Line
This chapter discusses how people that are designing and conducting experiments can work backward from the claims important to the public discussion of Universal Basic Income (UBI) to the claims experiments are able to examine. It suggests that UBI experiments should relate all findings to what it calls “the bottom line”: an overall assessment of the cost-effectiveness of a fully implemented national UBI. An issue-specific bottom line for any variable of interest should also be considered. Experiments cannot answer the bottom-line questions, but experimental reports can explain how their findings relate to those questions.