Gilbert, Christopher. <br/><br/>
The rational expectations hypothesis in models of primary commodity prices. 

 - Washington :  World Bank,  1990. 
<br/><br/> Argues that the standard linear model fails to account for primary commodity price movements in any significant area and so it is important to do more empirical work to learn to which commodities this non linear model applies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Primary commodities.<br/>Prices -- Commodities.--Prices -- Commodities.