Brad De Long wrote:
>
> Modern rubber tomatoes have one big advantage: they are really, really
> cheap because they require really, really little social labor time to
> grow...
The real advantage of rubber tomatoes was their rubberness that allowed them to be shipped over long distances without bruising. This characteristic reduces the social labor time used in transporting them after they are grown. -- Michael Perelman Economics Department California State University Chico, CA 95929
Tel. 530-898-5321 E-Mail michael at ecst.csuchico.edu