interpretation of Table 4 is similar. In Table 3, the first column shows
the direct income effect, or direct income per dollar of output received
by employees in a sector, Next, an entry in the "total income effect"
column for a sector is derived as indicated in Table 1. The interpretation,
for example for agricultural services, is that a dollar increase in final
demand for agricultural services increases income in the whole economy by
a total of $.57 due to additional employment. Of this amount $.44 repre-
sents the direct increase in income in agricultural services whereas the
remainder is due to increases induced by interdependencies in the economy,
The last column in Table 3, called "simple income multipliers", compares
the total to the direct income effect for each sector; it is in terms of
total income created in the economy per dollar income created in each sector,
Thus, although medical services has a high direct income effect, its simple
income multiplier is relatively low indicating a low degree of interaction
with other sectors in the Lee County economy. Simiarly, a sector with a
high total income multiplier such as retail trade may have a low simple
income multiplier if most of the income created goes directly to that sector.
 By themselves, the calculation of these multipliers may seem of little
 except academic interest. Their interest lies mainly in their Use of plan-
 ning and impact analysis to be described in a following section. The next
 section discusses some environmental multipliers which are derived similarly
 to the economic multipliers described in this section,


 ENVIRONMENTAL MULTIPLIERS


 Environmental multipliers to be derived here are of two sorts, multi-
pliers which relate increases in use of basic resources to increases in
final demand and multipliers which relate increases in pollution to in-
creases in final demand.
 Besides labor, basic resources used as inputs into production proces-
ses include energy, land, and water, If the supplies of these factors are
limited, the amount of industrial expansion which can occur will also be
limited. Thus, it is important to know how much demand for these resources
will increase relative to the supply of resources when economic expansion
occurs. The resource use multipliers are useful for this purpose. As in