In general we can say that fear is driven by two
opposite forces: it is alimented by media and it is reduced
by time εðτÞ.
Other factors that could be considered, in general,
when contamination occurs are the following:
– The demand D0
i τ ð Þ of the contaminated i-class of food
falls down (3)
– The demand for similar products increases (4)
– The total fish demand falls down (5)