Marginal implicit prices are calculated using mean residential
sales prices for each specific model for TSS and DIN
(see Table 4). The estimated models indicate that a one unit
(mg/L) increase in total suspended solids (TSS) has a negative
impact on average housing prices within the watershed of
$1086. Correspondingly, a one-unit change (mg/L) in the
dissolved inorganic nitrogen, a water quality attribute that
manifests itself as a contributor to eutrophication, also has a
negative impact on average housing prices in the watershed of
$17,642. It is important to note that both the TSS and DIN units
of measure are milligrams per liter. The ranges for the average
water quality indicators across the monitoring stations within
our sample are 8.918 mg/L to 12.851 mg/L for TSS and 0.082 mg/
L to 0.956 mg/L for DIN (see Table 2). As such a one unit change
in DIN would be indicative of a relatively large change in this
water quality measure, thus the significantly larger marginal
implicit price compared to TSS is to be expected.