3Deaton A and Laroque G. Competitive Storage and Commodity Price Dynamics [ J ]. Polit Econ, 1996 (104) :896 -923.
4Deaton A, Laroque G. On the Behavior of Commodity Prices[J]. Rev Econ Stud,1992(59) :1 -23.
5Engle R F. Autoregressive Conditional Heteroskedasticity with Estimates of the Variance of U. K. Inflation [J]. Econometrica, 1982(50) :987 - 1008.
6Prescott E. C. & Kydland F. E. Time to Build and Aggregate Fluctuation [ J ]. Ecnometrica, 1950 (50) : 1345 - 1370.
7Newbery D. M&J. E. Stiglitz. The Theory of Commodity Price Stabilization Rules:Welfare Impacts and Supply Responses [ J ]. Econ, 1979 (89) :799 - 817.