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PHYSICA A (Statistical Mechanics and its Applications) Volume 271, Nos.~3 and 4, published September 26, 1999 Self-organized percolation model for stock market fluctuations, Stauffer, D. and D. Sornette 496 Modeling the demand--price relations in a high-frequency foreign exchange market, Schmidt, A.B. 507 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%