This map depicts transportation costs and the "marketsheds" based on the least cost trade corridors associated with port facilities. The economic geography of market opportunity is not only shaped by the location of farm households relative to local towns and cities but also, potentially, by their location relative to major ports and airports. Port locations not only influence spatial price patterns for imported production inputs (e.g. fertilizers and agrochemicals) and the maximum farmgate costs of potential export crops, but also the local cost of imported foodstuffs that might compete with local produce.
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