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21.
We prove that the undetermined Taylor series coefficients of local approximations to the policy function of arbitrary order in a wide class of discrete time dynamic stochastic general equilibrium (DSGE) models are solvable by standard DSGE perturbation methods under regularity and saddle point stability assumptions on first order approximations. Extending the approach to nonstationary models, we provide necessary and sufficient conditions for solvability, as well as an example in the neoclassical growth model where solvability fails. Finally, we eliminate the assumption of solvability needed for the local existence theorem of perturbation solutions, complete the proof that the policy function is invariant to first order changes in risk, and attribute the loss of numerical accuracy in progressively higher order terms to the compounding of errors from the first order transition matrix. 相似文献
22.
微观层面上,商业银行有着“晴天送伞,雨天收伞”的行为特征;而在宏观层面上,银行信贷也存在明显的顺周期性特征。本文构建了一个带有金融摩擦的新凯恩斯主义DSGE模型,把对宏观经济现象的分析建立在坚实的微观基础之上,从而将上述两者纳入到一个统一的分析框架之内。此外,本文还运用我国的实际经济数据对模型中的结构参数进行贝叶斯估计,并对模型中的主要经济变量和外生冲击做了脉冲响应函数分析。研究发现：微观层面上,商业银行的信贷紧缩和扩张行为是其在金融市场存在信息不对称问题下的理性决策;宏观层面上,银行信贷的顺周期性是由于存在金融摩擦所导致的;在如今经济增速下行阶段,风险冲击增强了银行的惜贷慎贷情绪,加剧了企业融资难问题。最后,本文根据模型模拟为如何缓解企业融资难问题提出了一些实际的可操作的政策建议。 相似文献
23.
KOSTAS MAVROMATIS 《Journal of Money, Credit and Banking》2018,50(7):1441-1478
Monetary policy in the United States has been documented to have switched from reacting weakly to inflation fluctuations during the 1970s, to fighting inflation aggressively from the early 1980s onward. In this paper, I analyze the impact of the U.S. monetary policy regime switches on the Eurozone. I construct a New Keynesian two‐country model where foreign (U.S.) monetary policy switches regimes over time. I estimate the model for the U.S. and the Euro Area using quarterly data and find that the United States has switched between those two regimes, in line with existing evidence. I show that foreign regime switches affect home (Eurozone) inflation and output volatility and their responses to shocks, substantially, as long as the home central bank commits to a time‐invariant interest rate rule reacting to domestic conditions only. Optimal policy in the home country instead requires that the home central bank reacts strongly to domestic producer‐price inflation and to international variables, such as imported goods relative prices. In fact, I show that currency misalignments and relative prices play a crucial role in the transmission of foreign monetary policy regime switches internationally. Interestingly, I show that only marginal gains arise for the Euro Area when the European Central Bank (ECB) adjusts its policy according to the monetary regime in the United States. Thus, a simple time‐invariant monetary policy rule with a strong reaction to Producer Price Index (PPI) inflation and relative prices is enough to counteract the effects of monetary policy switches in the United States. 相似文献
24.
为了深入研究不同类型财政政策对宏观经济的影响效应,本文构建纳入异质性家庭和细化财税工具的新凯恩斯DSGE模型,并着重模拟分析了不同类型财政政策冲击对居民消费、私人投资、通胀率以及总产出水平的动态影响效应。研究结果表明,不同类型财税工具对宏观经济的冲击效果存在显著差异,对于税收政策,劳动收入税减税能够有助于提升消费水平和消费需求,并调节和完善消费结构;而对于政府支出政策,转移支付规模的扩张通过刺激家庭消费,引导消费内需有效提升,从而带动经济增长方式由投资驱动型向消费驱动型转变,进而推动经济高质量发展。 相似文献
25.
This paper analyzes a dynamic stochastic equilibrium model of an asset market based on behavioral and evolutionary principles. The core of the model is a non-traditional game-theoretic framework combining elements of stochastic dynamic games and evolutionary game theory. Its key characteristic feature is that it relies only on objectively observable market data and does not use hidden individual agents’ characteristics (such as their utilities and beliefs). A central goal of the study is to identify an investment strategy that allows an investor to survive in the market selection process, i.e., to keep with probability one a strictly positive, bounded away from zero share of market wealth over an infinite time horizon, irrespective of the strategies used by the other players. The main results show that under very general assumptions, such a strategy exists, is asymptotically unique and easily computable. 相似文献
26.
我国为应对2008年国际金融危机的冲击采取了一系列经济刺激政策,在发挥\"稳增长\"作用的同时,也在一定程度上导致我国企业部门杠杆水平快速上升,但与此同时,不良贷款率并没有随企业部门杠杆的上升而显著增加。为了解释企业部门违约与杠杆的周期特征,本文在金融加速器模型(Bernanke et al.,1999)基础上,引入政府对企业部门的违约救助机制,建立DSGE模型进行讨论。进一步地,本文还通过一个不合意的去杠杆政策试验表明,忽略资产价格稳定(或者说金融稳定)前提下的去杠杆政策,反而会使企业部门的杠杆和违约率同时上升到一个较高水平。最后,引入一个盯住预期资产价格的动态救助规则能够发挥稳定经济的作用,并提高社会福利水平。 相似文献
27.
We construct a DSGE search model with endogenous job destruction, incorporating wage rigidities, firing costs and unemployment benefit. We investigate the most important factors in matching the model’s cyclical properties with empirical data, particularly those of job creation rates (JCR) and job destruction rates (JDR). Firing costs assist significantly in explaining the procyclicality of JCR, the negative correlation of JCR and JDR, and the persistence of vacancies. They also decrease the counter-cyclicality of job turnover. We also postulate that the Hosios condition helps explain the negative correlation of JCR and JDR and vacancies’ persistence. Varying wage rigidities and unemployment income, however, do not improve the results. 相似文献
28.
在金融加速器模型的基础上,本文构建了含有企业异质性的动态随机一般均衡模型,并以此考察了我国货币政策对不同规模企业的非对称效应。研究结果表明,相对于大企业,中小企业更易受到紧缩性货币政策冲击的影响,中小企业产出下降幅度约是大企业的三倍。造成这种非对称效应的主要原因在于中小企业外部融资受到限制。此外,货币政策冲击通过信贷市场放大了经济波动,经济中存在着明显的金融加速器效应现象。因此,央行在制定货币政策时应考虑到货币政策对不同规模企业的非对称效应,并谨慎选择名义利率的调整幅度。 相似文献
29.
Kenichi Tamegawa; 《Bulletin of economic research》2024,76(2):529-544
This study investigates the role of money illusion (MI) in a dynamic stochastic general equilibrium model. We introduce MI such that households, in their intertemporal optimization, erroneously recognize nominal variables as real ones. We find that first, our model could exhibit money nonneutrality in the long run; second, the Taylor principle is a sufficient condition for determinacy but not a necessary condition; third, the response to output in monetary policy rule matters for the model not to exhibit money nonneutrality in the long run; and finally, MI could flatten the slope that represents the output-inflation trade-off. 相似文献
30.
本文基于新凯恩斯动态随机一般均衡模型,对预期冲击与经济周期波动影响的动态机制进行了讨论,并基于我国19992015年的宏观经济数据对预期冲击对中国经济周期波动的解释能力进行了实证检验。在将消费者情绪用主观贴现率和消费跨期替代弹性进行描述的基础上,将情绪变量引入到预期冲击对经济周期波动的动态影响机制之中,进一步对情绪、预期与经济周期波动三者之间的动态变化关系进行了讨论。研究结果表明,预期冲击可以解释50%以上的中国中长期经济波动;消费者的情绪变动与预期冲击的效应呈现正相关关系;通过稳定预期提升宏观经济管理效率的路径机制是有效的。 相似文献