Walter Hook of the Institute for Transport Development and Policy adds, “If every additional trip had to be taken with a shared car, one is compelled to pay, for that trip, the incremental cost of that rental, which embodies not only the variable cost but also a fraction of the capital cost of the asset. In that sense, it motivates a user to combine chores to gain maximum value from that rental.”24 On the other hand, in a scenario in which the car is owned and available for use all the time (and the investment is viewed by the car owner as a sunk cost), the perceived cost of every incremental
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