Bangladesh, Aug. 2 -- Supply shortages arising from erratic weather, crop failure or global price shocks fall largely outside government control, no matter how much blame it attracts when prices spike. Inefficiency within the supply chain, however, is an entirely different matter. It persists whether harvests are abundant or poor and keeps prices artificially high even when supplies are more than sufficient. This is a problem of human making. As produce passes through too many intermediaries before reaching consumers, each one adds a margin that bears little relation to the actual value of the crop. The result is that the price of everyday essentials can sometimes double or even triple without any corresponding increase in value. The Cent...