THE PROBLEM OF RENT 117

against the value of the product is less precisely done, and
is not much affected by the changes in the market valuation
of the product, when that product does not find its way to
the market, but is consumed by the producers. This consideration
 affects all classes of producers of goods or services
which are not exchanged before being consumed, and not
agriculturists only, or chiefly.
The political effects of a wide distribution of ownership
of property need no special consideration here. Itis sufficient
to remark that, in considering a policy for practical adoption,
some political advantage or disadvantage may have to be
weighed against counterbalancing economic disadvantage or
advantage respectively.