中国货币政策对美国的溢出效应研究——基于两国开放经济DSGE模型的分析

本文构建两国开放经济新凯恩斯主义DSGE模型,模型包括家庭、厂商、货币当局三个部门,采用贝叶斯估计方法对模型的动态参数进行估计,货币当局采用两种货币规则,一种是利率规则,另一种是货币供应量规则,分别在两种货币规则的情况下,实证分析中国货币政策对美国的溢出效应,结果表明,两种货币规则下的中国货币政策对美国经济变量的溢出方向都是相同的,但是在溢出大小方面还是有差异的,中国货币供应量增加导致的利率下降对美国利率的溢出明显大于在利率直接下调情况下对美国利率的溢出;中国货币供应量政策平滑性明显不如中国利率政策,中国在利率规则下对通货膨胀、产出、汇率的关注程度远远超过在货币供应量规则下的关注程度。因此,从中国货币政策的国内目标以及国际货币政策协调角度而言,泰勒规则比较适合中国当前的经济状况,能够在实现稳定物价和经济增长国内目标的同时,降低对美国宏观经济变量的冲击。     

Identifying Treatment Effects Under Data Combination

We consider the identification of counterfactual distributions and treatment effects when the outcome variables and conditioning covariates are observed in separate data sets. Under the standard selection on observables assumption, the counterfactual distributions and treatment effect parameters are no longer point identified. However, applying the classical monotone rearrangement inequality, we derive sharp bounds on the counterfactual distributions and policy parameters of interest.     

Identification and Inference in Nonlinear Difference‐in‐Differences Models

This paper develops a generalization of the widely used difference‐in‐differences method for evaluating the effects of policy changes. We propose a model that allows the control and treatment groups to have different average benefits from the treatment. The assumptions of the proposed model are invariant to the scaling of the outcome. We provide conditions under which the model is nonparametrically identified and propose an estimator that can be applied using either repeated cross section or panel data. Our approach provides an estimate of the entire counterfactual distribution of outcomes that would have been experienced by the treatment group in the absence of the treatment and likewise for the untreated group in the presence of the treatment. Thus, it enables the evaluation of policy interventions according to criteria such as a mean–variance trade‐off. We also propose methods for inference, showing that our estimator for the average treatment effect is root‐N consistent and asymptotically normal. We consider extensions to allow for covariates, discrete dependent variables, and multiple groups and time periods.     

我国节能减排政策的措施与目标协同有效吗?——基于1052条节能减排政策的研究

基于我国1997年至2013年间颁布的1 052条节能减排政策,利用从政策力度、政策措施和政策目标三个维度对我国节能减排政策进行量化的数据,构建了针对不同措施与目标协同的计量模型.论文研究了政策措施与目标协同对节能减排效果的影响,并分析了节能减排政策措施与目标的协同状况及我国政府对其使用状况.研究发现,我国各节能减排政策中分别以行政措施和引导措施为基础的措施与目标协同对节能减排效果的影响存在显著的方向性差异,且不同措施与目标协同方式的使用程度差异明显并有待进一步完善.本文厘清了不同政策措施与目标的协同效果,为我国政府节能减排政策协同机制的建立和有效实施提供了理论依据.     

Uncertainty and the Value of Information with Stochastic Losses from Global Warming

We present an uncertainty analysis conducted using CETA-R, a model in which the costs of climate change are specified as Risks of large losses. In this analysis, we assume that three key parameters may each take on "high" or "low" values, leading to eight possible states of the world. We then explore optimal policies when the state of the world is known, and under uncertainty. Also, we estimate the benefits of resolving uncertainty earlier. We find that the optimal policy under uncertainty is similar to the policy that is optimal when each of the key parameters is at its low value. We also find that the value of immediate uncertainty resolution rises sharply as the alternative to immediate resolution is increasingly delayed resolution.     

Better Safe than Sorry? The Effects of Income Risk and Unemployment Risk on Wages

We study the effects of income risk and unemployment risk on individual wages simultaneously. Starting point for the empirical analysis is a portfolio model for the labor market. This model shows positive wage effects for both risks but also a negative interaction effect. Using German administrative panel data we estimate the effects of the income risk, the unemployment risk and their interaction on individual wages separately for men and women in East and West Germany. We find the expected positive wage effects for both risks as well as a negative interaction effect. The marginal effect of income risk on wages is positive, whereas the marginal effect of unemployment risk is negative.     

Structural Equations,Treatment Effects,and Econometric Policy Evaluation1

This paper uses the marginal treatment effect (MTE) to unify the nonparametric literature on treatment effects with the econometric literature on structural estimation using a nonparametric analog of a policy invariant parameter; to generate a variety of treatment effects from a common semiparametric functional form; to organize the literature on alternative estimators; and to explore what policy questions commonly used estimators in the treatment effect literature answer. A fundamental asymmetry intrinsic to the method of instrumental variables (IV) is noted. Recent advances in IV estimation allow for heterogeneity in responses but not in choices, and the method breaks down when both choice and response equations are heterogeneous in a general way.     

Time Consistency of Fiscal and Monetary Policy: A Solution

This paper demonstrates how time consistency of the Ramsey policy—the optimal fiscal and monetary policy under commitment—can be achieved. Each government should leave its successor with a unique maturity structure for nominal and indexed debt, such that the marginal benefit of a surprise inflation exactly balances the marginal cost. Unlike in earlier papers on the topic, the result holds for quite general Ramsey policies, including time‐varying polices with positive inflation and positive nominal interest rates. We compare our results with those in Persson, Persson, and Svensson (1987), Calvo and Obstfeld (1990), and Alvarez, Kehoe, and Neumeyer (2004).     

货币政策对M2的动态效应时滞分析及危机效应测算

科学测算金融危机期间已出台货币政策对货币供应量M2的效应时滞和贡献程度具有一定的现实价值。文章利用Markov状态转换及HP滤波模型识别不同货币政策状态的时间区间;利用多项式滞后分布模型分析政策工具变量对货币供应量影响的滞后效应,并以此为先验信息,建立了货币政策的Bayesian-PDLS动态效应分布模型,对金融危机期间已出台的货币政策效果进行了实际测算。主要结果表明:(1)外汇储备为M2的决定性因素,存款准备金率为M2主要的限制性因素;(2)货币政策变量M2总体对利率的弹性变化呈"U"型分布;在紧缩型情况下M2对利率的弹性变化呈"W"型分布;在扩张情形下M2对利率的弹性变化呈"v"型分布。     

The Immediate Impact of the Fukushima Daiichi Accident on Local Property Values

The Fukushima Daiichi accident released huge amounts of radioactive material over a wide area. We can appreciate the geographical extent of radioactive contamination from the information published online by the Japanese government. Historically, this is an unprecedented situation, which allows “natural experimentation” to estimate the causal effects of radioactive contamination on our society. This study focused on property value losses caused by the accident and analyzed changes in land appraisals around the Fukushima Daiichi plant from July 2010 to July 2011 within the framework of hedonic approach. Thus, we estimated the short‐run impact of the contamination or the change in marginal value of proximity to the plant. The results suggest that the appraisals significantly and monotonically depreciated with increasing contamination levels. However, there was no evidence to suggest changes in the marginal value of proximity to the plant. A comparison between the appraisals and transaction prices indicates that this result could be interpreted as an underestimate of actual property value losses.     

货币政策非对称性与惰性区域的识别和检验

在对货币当局政策偏好分析的基础上,构建更为一般的货币政策反应模型,用于识别名义利率对通胀缺口和产出缺口的非线性和非对称调整特征以及货币政策对通货膨胀和产出变化的惰性属性。采用7天期银行间同业拆借加权平均利率作为名义利率的代理变量,对上述货币政策反应模型进行广义矩估计,并对参数进行约束检验。研究结果表明,中国货币政策对通货膨胀的调整存在明显的惰性区域,即当通货膨胀率在目标通货膨胀率的较小范围内波动时,利率并未针对通货膨胀与目标通货膨胀率的偏离做出调整,而当通货膨胀率与目标通货膨胀率的偏离(即通胀缺口)超过惰性区域时,货币当局开始针对通胀缺口调整利率,并且随着通胀缺口的增大,利率对通货膨胀的反应越来越强烈,存在明显的非线性调整特征。     

Modeling Precheck Parallel Screening Process in the Face of Strategic Applicants with Incomplete Information and Screening Errors

In security check systems, tighter screening processes increase the security level, but also cause more congestion, which could cause longer wait times. Having to deal with more congestion in lines could also cause issues for the screeners. The Transportation Security Administration (TSA) Precheck Program was introduced to create fast lanes in airports with the goal of expediting passengers who the TSA does not deem to be threats. In this lane, the TSA allows passengers to enjoy fewer restrictions in order to speed up the screening time. Motivated by the TSA Precheck Program, we study parallel queueing imperfect screening systems, where the potential normal and adversary participants/applicants decide whether to apply to the Precheck Program or not. The approved participants would be assigned to a faster screening channel based on a screening policy determined by an approver, who balances the concerns of safety of the passengers and congestion of the lines. There exist three types of optimal normal applicant's application strategy, which depend on whether the marginal payoff is negative or positive, or whether the marginal benefit equals the marginal cost. An adversary applicant would not apply when the screening policy is sufficiently large or the number of utilized benefits is sufficiently small. The basic model is extended by considering (1) applicants' parameters to follow different distributions and (2) applicants to have risk levels, where the approver determines the threshold value needed to qualify for Precheck. This article integrates game theory and queueing theory to study the optimal screening policy and provides some insights to imperfect parallel queueing screening systems.     

Efficient Estimation of Average Treatment Effects Using the Estimated Propensity Score

We are interested in estimating the average effect of a binary treatment on a scalar outcome. If assignment to the treatment is exogenous or unconfounded, that is, independent of the potential outcomes given covariates, biases associated with simple treatment‐control average comparisons can be removed by adjusting for differences in the covariates. Rosenbaum and Rubin (1983) show that adjusting solely for differences between treated and control units in the propensity score removes all biases associated with differences in covariates. Although adjusting for differences in the propensity score removes all the bias, this can come at the expense of efficiency, as shown by Hahn (1998), Heckman, Ichimura, and Todd (1998), and Robins, Mark, and Newey (1992). We show that weighting by the inverse of a nonparametric estimate of the propensity score, rather than the true propensity score, leads to an efficient estimate of the average treatment effect. We provide intuition for this result by showing that this estimator can be interpreted as an empirical likelihood estimator that efficiently incorporates the information about the propensity score.     

Efficient Semiparametric Estimation of Quantile Treatment Effects

This paper develops estimators for quantile treatment effects under the identifying restriction that selection to treatment is based on observable characteristics. Identification is achieved without requiring computation of the conditional quantiles of the potential outcomes. Instead, the identification results for the marginal quantiles lead to an estimation procedure for the quantile treatment effect parameters that has two steps: nonparametric estimation of the propensity score and computation of the difference between the solutions of two separate minimization problems. Root‐N consistency, asymptotic normality, and achievement of the semiparametric efficiency bound are shown for that estimator. A consistent estimation procedure for the variance is also presented. Finally, the method developed here is applied to evaluation of a job training program and to a Monte Carlo exercise. Results from the empirical application indicate that the method works relatively well even for a data set with limited overlap between treated and controls in the support of covariates. The Monte Carlo study shows that, for a relatively small sample size, the method produces estimates with good precision and low bias, especially for middle quantiles.     

经济政策不确定性、宏观经济与资产价格波动——基于TVAR模型及溢出指数的实证分析

本文利用Baker等人构建的经济政策不确定性指数和我国1997年01月-2017年09月的宏观经济数据，通过非线性TVAR模型及其方差分解构建的溢出指数，实证考察了我国经济政策不确定性对宏观经济与资产价格的非对称影响，并测度了在不同经济政策不确定性环境下，经济变量间的相互溢出效应。研究发现：（1）经济政策不确定性的影响是非对称的，在经济政策不确定性较高时，其正向冲击将使得产出降低0.21%左右，房价和股市收益率分别上涨0.67%、0.51%左右；而在经济政策不确定性程度较低时，其正向冲击的影响微弱。（2）溢出指数表明，经济政策不确定性对产出、房价和股市存在净溢出，且在经济政策不确定性较高时期，总体溢出指数超过50%，变量间的联动性较强。研究结果表明，相关部门在制定及调整经济政策时应充分考虑其可能引发的不确定性，并通过阐明经济政策意图等方式，将负面影响降到最低。     

上海股票市场股利政策信息传递效应的实证研究

本文采用累积超额收益法对上海股票市场的股利政策进行实证研究,探讨了沪市股利政策信息传递效应存在性及其特征。实证研究的结论对揭示我国股利政策的信息传递效应和规范发展我国股票市场具有重要的现实意义。     

Application Development Using Fault Data

We develop a general model for software development process and propose a policy to manage system coordination using system fault reports (e.g., interface inconsistencies, parameter mismatches, etc.). These reports are used to determine the timing of coordination activities that remove faults. We show that under an optimal policy, coordination should be performed only if a “threshold” fault count has been exceeded. We apply the policy to software development processes and compare the management of those projects under different development conditions. A series of numerical experiments are conducted to demonstrate how the fault threshold policy needs to be adjusted to changes in system complexity, team skill, development environment, and project schedule. Moreover, we compare the optimal fault threshold policy to an optimal release‐based policy. The release‐based policy does not take into account fault data and is easier to administer. The comparisons help to define the range of project parameters for which observing fault data can provide significant benefits for managing a software project.     

WHAT GOOD IS WEALTH WITHOUT HEALTH? THE EFFECT OF HEALTH ON THE MARGINAL UTILITY OF CONSUMPTION

We estimate how the marginal utility of consumption varies with health. To do so, we develop a simple model in which the impact of health on the marginal utility of consumption can be estimated from data on permanent income, health, and utility proxies. We estimate the model using the Health and Retirement Study's panel data on the elderly and near‐elderly, and proxy for utility with measures of subjective well‐being. Across a wide range of alternative specifications and assumptions, we find that the marginal utility of consumption declines as health deteriorates, and we are able to clearly reject the null of no state dependence. Our point estimates indicate that a one‐standard‐deviation increase in the number of chronic diseases is associated with a 10%–25% decline in the marginal utility of consumption relative to this marginal utility when the individual has no chronic diseases. We present some simple, illustrative calibration results that suggest that state dependence of the magnitude we estimate can have a substantial effect on important economic problems such as the optimal level of health insurance benefits and the optimal level of life‐cycle savings.     

延迟支付条件下易逝品的最优订货决策研究

本文在考虑延期支付的情况下构建了二级供应链关于易逝品的最优订货决策模型,其中供应链由单个供应商和多个面临资金约束的零售商组成。在不允许缺货的情况下,供应商为零售商提供延迟支付来缓解零售商的资金压力,同时零售商对产品的定价将随易逝品的价值变质而变化。本文利用遗传算法对模型进行了算例分析,同时对模型中的相关参数进行了敏感性分析。结果表明,延迟支付能够提高供应链总利润并降低风险,从而有利于供应链整体效益的提高。在延期支付条件下,供应链各成员获得的收益增量存在较大差距,其中供应商能够获得更多收益。最后,通过敏感性分析,我们还发现产量及易逝品保质期的变动会对供应链整体利润产生不同程度的影响。     

Unemployment Benefits and Employment Policies in the Presence of a Strong Trade Union: A Comparison

Abstract. The paper analyses, within a game theoretic approach, the consequences on private employment and real wages of a government policy of raising unemployment benefits following a fall in employment. The effects of such a policy are then compared with those arising from a more conventional demand policy. Under the policy regime described the reaction of the unions will cause, when the economy is hit by a negative shock on employment, a tendency for the real wage to rise and for private employment to decrease further. As far as the comparison of such policy with a policy of direct employment by the government is concerned we have reached the following conclusions. A policy based on unemployment benefit will give rise to a smaller increase in the real wage than a policy based on public employment if the change in the marginal utility of being employed due to change in the unemployment benefit is smaller than the utility that the union will obtain from an extra employed person. Moreover it appears that a policy based on unemployment benefits has a smaller negative effect on private employment, than a policy based on direct employment. if such a policy is adopted just after an employment benefits represent also a subsidy to the firms. We have shown that the effects on the real wage of the Policy rule considered are in this case stronger. The effects on employment depend on the relative strength of the union reaction and of the policy's supply side effects.