各位朋友,能不能帮我下以下几篇文献,万分感谢! 16、 【篇名】The Theory of Hedgingand Speculation in Commodity Futures 【作者】Johnson,Leland L. 【网址】http://www.jstor.org/sici?sici=0034-6527(1960)27:3<139>2.0.CO;2- 17、 【篇名】A Capital AssetPricing Model with Time-varying Covariances 【作者】T Bollerslev, RFEngle, JM Wooldridge 【网址】http://www.jstor.org/stable/1830713 18、 【篇名】Hedging with stockindex futures: Estimation and forecasting with error correction model 【作者】Asim Ghosh 【网址】http://onlinelibrary.wiley.com/doi/10.1002/fut.3990130703/abstract 19、 【篇名】Estimatingtime-varying optimal hedge ratios on futures markets 【作者】Robert J. Myers 【网址】http://onlinelibrary.wiley.com/doi/10.1002/fut.3990110105/abstract 20、 【篇名】Comparison ofanalytical approaches for estimating hedge ratios for agricultural commodities 【作者】Harvey J. Witt;Ted C.Schroeder;Marvin L. Hayenga 【网址】http://onlinelibrary.wiley.com/doi/10.1002/fut.3990070204/abstract
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