It is, because another way of phrasing that is "coresidence provides no additional explanatory power beyond economic circumstances." When that's what your data

It is, because another way of phrasing that is "coresidence provides no additional explanatory power beyond economic circumstances." When that's what your data looks like, proper study design either involves testing that hypothesis, or staying the fuck away from making conclusions that take one of those as significant and one as non-significant.