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Many people seem to believe that they must model the discreteness of orders and payments because, at the micro-level, the transactions are discrete. However, most policy issues deal with average overviews of the micro level and can be more simply handled as continuous flows. In the situation below, ...

The first published system dynamics model of commodity cycles is in: Meadows, Dennis L., 1970. Dynamics of Commodity Production Cycles. Waltham, MA: Pegasus Communications. 104 pp. Libraries may have copies that show earlier publishers. You will find some twenty references in the System Dynamics Bib...