The correlation length of commodity markets 2. Theoretical framework |
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Authors: | BM Roehner |
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Institution: | (1) LPTHE, University Paris 7, 2 place Jussieu, 75005 Paris, France, FR |
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Abstract: | The second of this series of two papers is devoted to a theoretical analysis of spatial interaction between commodity markets.
The theoretical framework that we present is referred to as the stochastic spatial arbitrage model (SSAM); it accounts for
most of the empirical regularities observed in the first paper. Two basic mechanisms are found to be responsible for spatial
inter-market interaction, namely (i) spatial arbitrage and hedging conducted by traders, (ii) spatial correlation between
local shocks; the latter is favored by a similar economic and cultural environment. The SSAM includes both effects and offers
a wide range of predictions about price volatility, trade, price correlations, price differentials. Statistical tests display
a convergent array of evidence in favor of the model. However several predictions cannot be tested by lack of statistical
evidence, a circumstance which shows that yet additional “experimental” work is r!
equired.
Received 17 May 1999 and Received in final form 31 May 1999 |
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Keywords: | PACS 64 60 Fr Equilibrium properties near critical points critical exponents - 87 23 Ge Dynamics of social systems - 89 40 +k Transportation |
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