
Elements 23
though each member of the public could be described as supportive, opposed,
or neutral, two populations may have very different intensities of support (or
opposition), suggesting that the prospects of raising money for advertising
on behalf of the law ar e also different. There is no natural attribute for this
intensity of support.
Simple measurements of physica l quantities are usually natura l attributes
when they are directly c onnected to the behavior of interest. For example, if I
were doing a study of the weights of children of various ages, weight measure-
ments from a doctor’s scale would be a natural attribute. Of course, if I were ...