Dynamique non linéaire du marché mondial des huiles et des graisses

Price dynamics analysis provides key information on the possible consequences one can expect from the opening up and the liberalization of agricultural markets. The potential role of chaotic dynamics in generating world vegetable oils prices is investigated here with more than 1400 weekly data. The evidence of a pure chaotic determinism cannot be accepted, while the proof of nonlinear dynamics in prices remains strong and casts some doubt on the market's ability to find out its equilibrium position and stabilize by itself.