英文标题:
《Regime-Switching Temperature Dynamics Model for Weather Derivatives》
---
作者:
Samuel Asante Gyamerah, Philip Ngare, and Dennis Ikpe
---
最新提交年份:
2018
---
英文摘要:
Weather is a key production factor in agricultural crop production and at the same time the most significant and least controllable source of peril in agriculture. These effects of weather on agricultural crop production have triggered a widespread support for weather derivatives as a means of mitigating the risk associated with climate change on agriculture. However, these products are faced with basis risk as a result of poor design and modelling of the underlying weather variable (temperature). In order to circumvent these problems, a novel time-varying mean-reversion L\\\'evy regime-switching model is used to model the dynamics of the deseasonalized temperature dynamics. Using plots and test statistics, it is observed that the residuals of the deseasonalized temperature data are not normally distributed. To model the non-normality in the residuals, we propose using the hyperbolic distribution to capture the semi-heavy tails and skewness in the empirical distributions of the residuals for the shifted regime. The proposed regime-switching model has a mean-reverting heteroskedastic process in the base regime and a L\\\'evy process in the shifted regime. By using the Expectation-Maximization algorithm, the parameters of the proposed model are estimated. The proposed model is flexible as it modelled the deseasonalized temperature data accurately.
---
中文摘要:
天气是农业作物生产中的一个关键生产因素,同时也是农业中最重要和最不可控的危险源。天气对农业作物生产的这些影响引发了对天气衍生品的广泛支持,作为缓解气候变化对农业相关风险的一种手段。然而,由于基础天气变量(温度)的设计和建模不当,这些产品面临基差风险。为了避免这些问题,我们使用了一种新的时变均值回归L挈evy区域切换模型来模拟去季节化温度动态的动力学。通过绘图和测试统计,可以观察到,去季节化温度数据的残差不是正态分布。为了对残差的非正态性进行建模,我们建议使用双曲线分布来捕获移位区域残差经验分布中的半重尾和偏态。所提出的模式转换模型在基本模式下具有均值回复异方差过程,在移位模式下具有L拻vy过程。利用期望最大化算法对模型参数进行估计。所提出的模型是灵活的,因为它准确地模拟了去季节化的温度数据。
---
分类信息:
一级分类:Quantitative Finance 数量金融学
二级分类:Mathematical Finance 数学金融学
分类描述:Mathematical and analytical methods of finance, including stochastic, probabilistic and functional analysis, algebraic, geometric and other methods
金融的数学和分析方法,包括随机、概率和泛函分析、代数、几何和其他方法
--
---
PDF下载:
-->


雷达卡



京公网安备 11010802022788号







