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71.
This paper develops a simple heterogeneous agent model (HAM) of asset prices with bounded rationality and adaptive behaviour. The model features feedback loop that amplifies shocks and leads to large price fluctuations. Our model not only retains the nonlinear interaction between prices and population in HAMs but also allows for a quantitative comparison with the data. Estimating the model to the data shows that the feedback loop helps explain the large variations in expected returns, such as return predictability and excess volatility. 相似文献
72.
A cap on global warming implies a tighter carbon budget which can be enforced with a credible second-best renewable energy subsidy designed to lock up fossil fuel and curb cumulative emissions. Such a subsidy brings forward the end of the fossil fuel era but accelerates fossil fuel extraction and global warming in the short run. A weaker fossil fuel oligopoly implies that anticipation of a given global carbon budget induces fossil producers to deplete reserves more voraciously and accelerate global warming. This race to burn the last ton of carbon is more intensive for the feedback than open-loop Nash equilibrium, so that the Green Paradox effect of a renewable energy subsidy is stronger. There is an intermediate phase of limit pricing to keep renewable energy producers at bay, which becomes much more relevant when a cap on global warming is enforced. A stronger fossil fuel oligopoly lengthens the period of limit pricing and typically brings forward the carbon-free era. Finally, the mere risk of a cap on global warming being enforced at some unknown, future date makes fossil fuel extraction more voracious and accelerates global warming. 相似文献
73.
Changing linkages between agricultural and energy markets have attracted considerable attention in research and policy discussions during recent years. As one of the largest biofuel markets worldwide, the German biodiesel market is of particular interest. It has grown rapidly since the beginning of the new millennium, with this growth being driven mainly by political interventions. Vertical price transmission channels along the biodiesel supply chain are analyzed in this study. We examine the relationship between diesel and biodiesel prices, and between rapeseed oil, soy oil, and biodiesel prices between 2002 and 2008. Due to pronounced changes in market conditions and the policy framework, a regime‐dependent Markov‐switching vector error‐correction model is used. The regimes are characterized by markedly different price adjustment behaviors. Before 2005 and from late 2007 onward, a regime characterized by the strong orientation of biodiesel prices toward diesel prices dominates. Between 2005 and 2007, biodiesel and rapeseed oil prices are mutually interdependent. Frequent switches between the regimes of the price dynamics during this period indicate a high extent of uncertainty and instability in the market. 相似文献
74.
In this paper, we define the conditional risk measure under regime switching and derive a class of time consistent multi-period risk measures. To do so, we describe the information process with regime switching in a product space associated with the product of two filtrations. Moreover, we show how to establish the corresponding multi-stage portfolio selection models using the time consistent multi-period risk measure for medium-term or long-term investments. Take the conditional value-at-risk measure as an example, we demonstrate the resulting multi-stage portfolio selection problem can be transformed into a second-order cone programming problem. Finally, we carry out a series of empirical tests to illustrate the superior performance of the proposed random framework and the corresponding multi-stage portfolio selection model. 相似文献
75.
We investigate the impacts of speculation on stock price and return volatility in a framework with regime shifting. We find that greater difference in beliefs about the probability of bad state leads to higher stock prices. The intuition is that in periods of higher dispersion of beliefs, the investors perceive greater speculative opportunities, leading to increased demands and valuations of the stock. When investors agree with each other on the state of dividend growth, they have a stronger incentive to invest in the riskless bond, when becoming more pessimistic about the dividend growth. As a result, the demand and the valuations of stock decrease. Moreover, higher level of heterogeneity in beliefs gives rise to higher volatility of the stock returns, even in the absence of dividend shocks. Furthermore, with homogeneous beliefs, return volatility with respect to investors’ beliefs follows an inverted-U shape. 相似文献
76.
发展战略与汇率制度选择 总被引：1，自引：0，他引：1
一般而言,一国汇率制度的选择会受该国经济和政治因素的影响,而发展中国家在选择汇率制度时还会受到其发展战略的影响.本文考察了发展战略与汇率制度选择之间的关系,发现实施赶超战略和进口替代战略的国家会选择固定汇率制度并高估本币币值,甚至采用多元汇率制度;实施出口导向战略的国家会选择固定汇率或者钉住汇率制度,一般钉住美元且波幅很小,并低估本币币值;而只有真正实施比较优势战略的国家才选择浮动汇率制度,政府很少干预汇率的变化.现阶段,我国要坚定地实施有管理的浮动汇率.并适当控制人民币的升值速度. 相似文献
77.
Empirical evidence shows that there is a close link between regime shifts and business cycle fluctuations. A standard term
structure of interest rates, such as the Cox et al. (1985 Econometrica, 53, 385–407; CIR) model, is sharply rejected in the Treasury bond data. Only Markov regime-switching models on the entire yield
curve of the Treasury bond data can account for the observed behavior of the yield curve. In this paper, we examine the impact
of regime shifts on AAA-rated and BBB-rated corporate bonds through the use of a reduced-form model. The model is estimated
by the Efficient Method of Moments (EMM). Our empirical results suggest that regime-switching risk has significant implications
for corporate bond prices and hence has a material impact on the entire corporate bond yield curve, providing evidence for
the approach of rating through the cycle employed by rating agencies. 相似文献
78.
Bertrand oligopolies are competitive markets in which a small number of firms producing similar goods use price as their strategic variable. In particular, each firm wants to determine the optimal price that maximizes its expected discounted lifetime profit. The oligopoly problem can be modeled as nonzero-sum games which can be formulated as systems of Hamilton–Jacobi–Bellman (HJB) partial differential equations (PDEs). In this paper, we propose fully implicit, positive coefficient finite difference schemes that converge to the viscosity solution for the HJB PDE from dynamic Bertrand monopoly and the two-dimensional HJB system from dynamic Bertrand duopoly. Furthermore, we develop fast multigrid methods for solving these systems of discrete nonlinear HJB PDEs. The new multigrid methods are general and can be applied to other systems of HJB and HJB-Isaacs PDEs arising from American options under regime switching and American options with unequal lending/borrowing rates and stock borrowing fees under regime switching, respectively. We provide a theoretical analysis for the smoother, restriction and interpolation operators of the multigrid methods. Finally, we demonstrate the effectiveness of our method by numerical examples from the dynamic Bertrand problem and pricing American options under regime switching. 相似文献
79.
80.
基于汇率制度影响因素的汇率制度选择：一个理论综述 总被引：3，自引：0，他引：3
汇率制度的选择是一个动态的转换过程,影响汇率制度的因素包括许多方面。基于影响汇率制度的经济因素,应从经济结构特征、价格确定及货币危机理论等角度探讨汇率制度选择理论;基于影响汇率制度的政策因素,应从政策配合、BBC规则及政府信誉等角度探讨汇率制度选择理论。此外,对发展中国家汇率制度选择的讨论在20世纪90年代多次金融危机后开始大量增加,其中比较有影响力的是“原罪论”与“浮动恐惧论”。 相似文献