Moreover,this alternative model shows that red shrimp prices
increase proportionally with the travel time between the port and
Barcelona's wholesale market,when travel time increases by 1%
the price of red shrimps increases by 0.06%. This could be
explained because the travel time from the wholesale market
captures the difficulty to obtain substitutive luxury products in the
local markets. Therefore,the higher the travel time from the
wholesale market,the more difficult to obtain luxury substitutes
in the area,and so local prices are higher.