Conceptualization and parameterization of the market price mechanism in the WORLD6 model for metals, materials, and fossil fuels

Harald Ulrik Sverdrup () and Anna Hulda Olafsdottir
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Harald Ulrik Sverdrup: University of Iceland
Anna Hulda Olafsdottir: University of Iceland

Mineral Economics, 2020, vol. 33, issue 3, No 2, 285-310

Abstract: Abstract A model for market price modeling in an integrated global model for resource supply has been developed and successfully applied in the WORLD6 model. A dynamic market and price model has been developed, based on immediately tradable amounts, affected by supply and demand. Real-world drivers and a systems approach with feedbacks in the price setting and market mechanisms were used in this study, without the model becoming too complex. Observed cause and effects and feedbacks were included, in order to have explanatory power or be truer to economic reality in terms of both structure and parameter settings. The model is adaptive from a fully free dynamic market to a biased or oligarchic market, depending on the condition. The market price model was parameterized for copper, zinc, lead, nickel, iron, aluminum, wolfram, niobium, molybdenum, lithium, vanadium, gold, silver, platinum, palladium, and tin, and for fossil fuels like oil and hard coal. The equation has the shape: price = k × market amount n, where market amount is the instantly tradable amount of metal in the market arena, k is a metal-specific coefficient, and n is an exponent. The derived equations were applied in the WORLD6 model, making simulations of market price set every day endogenously in the model possible. The price mechanism proposed here perform well in tests against observed data when included in the WORLD6 model. The obtained results were compared to a price curve for coffee and a similar pattern was found.

Keywords: WORLD6; System dynamics; Metal price; Mining; Recycling; Dynamic modeling (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1007/s13563-019-00182-7

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