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41.
Svein Nordbotten 《Scandinavian actuarial journal》2013,2013(1):60-64
Abstract In works on sample survey theory and methods the sample size is usually regarded as determined by the sampling procedure and the total cost of the survey. 相似文献
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作为高职院校发展的生命线,校园文化建设的基础性、主导性地位不容忽视。文化建设创新重在观念更新、体制革新,高职院校需要统筹兼顾,重新定位,发挥中国传统文化优势,实现中外文化资源的互补利用。高职院校应以人本观为基点,以培养复合型人才为目标,争创校园文化品牌,扩大文化的影响力,构建和谐校园。 相似文献
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In this paper we study the ruin problem for insurance models that involve investments. Our risk reserve process is an extension of the classical Cramér-Lundberg model, which will contain stochastic interest rates, reserve-dependent expense loading, diffusion perturbed models, and many others as special cases. By introducing a new type of exponential martingale parametrized by a general rate function, we put various Cramér-Lundberg type estimations into a unified framework. We show by examples that many existing Lundberg-type bounds for ruin probabilities can be recovered by appropriately choosing the rate functions. 相似文献
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从DSS应用现状出发,介绍了马尔柯夫分析的定义和数学原理,阐述了马尔柯夫分析的过程和预测的基本步骤,利用Excel设计了进行市场占有率预测的应用模型,并进行了仿真预测和决策分析。测试表明,应用模型简便通用,操作方便,提高了预测的计算精度和效率。 相似文献
48.
《Food Policy》2017
Increased fertilizer use is considered important for agricultural development in low-income countries. Promoting increased use of chemical fertilizer by lowering its price may be ineffective if demand is price inelastic. In theory, the price elasticity of demand depends on the returns to its use, but the evidence is scarce. Furthermore, while returns are often estimated for small changes in chemical fertilizer use, returns to larger changes in its use (intensive margins) are less understood. Through the inter-zonal comparisons in Nepal, we provide indicative evidence that greater returns to chemical fertilizer are associated with greater price elasticities of demand. Moreover, the evidence suggests that returns at the intensive margins, rather than returns to small changes, may largely account for inter-zonal differences in returns to chemical fertilizer within Nepal. The results suggest that better understanding the returns at the intensive margins is critical for effective agricultural inputs policies in developing countries. 相似文献
49.
Christian Max Møller 《Scandinavian actuarial journal》2013,2013(2):169-184
Abstract In this paper asymptotic properties for the risk process will be studied when the number of risk units tends to infinity. The paper extends asymptotic properties for the classical risk process to more general processes. In the classical risk process the claim amounts are assumed independent and identically distributed, and the claim number process is a homogeneous Poisson process. The key tool is point process theory with associated martingale theory. The results are illustrated by examples. 相似文献
50.
Piet de Jong 《Scandinavian actuarial journal》2013,2013(2):123-125
Abstract An alternative approach to the variance principle of premium determination is explored. The approach rationalises the principle in terms of an economic theory and formalises the notion that loadings in addition to the ‘fair’ premium are related to competition and expenses. 相似文献