NPVMNorth Platte Valley Museum (Gering, NE)
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where, NPVM is the net present value of migration, E is earnings, LC is living cost, i is the discount rate, n is the time horizon, FJ is Fiji, NZ is New Zealand, t is time and ICM is the initial costs of migration.
According to equation 1, an individual will choose to migrate only if the NPVM is positive.