Inference for treatment effects of job training on wages: using bounds to compute Fisher’s exact p-value

In the context of a training program’s randomized evaluation, where estimating wage effects is of interest, we propose employing bounds that control for sample selection as a model-based statistic to conduct randomization-based inference à la Fisher. Inference is based on a sharp null hypothesis of no treatment effect for anyone. In contrast to conventional inference, Fisher p-values are nonparametric and do not employ large sample approximations.     

气候政策的经济环境效应及其缓解措施的研究综述——兼谈对我国的启示

气候政策对一国经济和环境产生一定的效应,开放经济条件下还将对一国产业的国际竞争力产生影响。碳泄漏等问题使得气候政策的实际减排效果受到了质疑。气候政策实施过程中产生的这些问题都将严重影响气候政策的有效性。为使气候政策的有效性达到最优,很多学者研究了缓解气候政策负面效应的措施。本文对一些重要的气候政策的经济环境效应进行了理论总结,从竞争力效应、经济效应、环境效应和研究方法这四个方面综述了相关实证研究成果,分析了气候政策负面效应的缓解措施,以期为制定适合我国的气候政策提供借鉴。     

The Case of the Missing Pollution Haven Hypothesis

One particularly vexing puzzle for economists and policymakers over the past several decades concerns the empirical significance of the theoretically predicted pollution haven hypothesis. While neoclassical theory and conventional wisdom both surmise that local economies will suffer deleterious effects from stricter environmental regulations, empirical studies have largely failed to validate such claims. This study utilizes the method of matching to show that the impact of stricter regulation is heterogeneous spatially, varying systematically based on location-specific attributes. Previous studies that assume a homogenous response may therefore inadvertently mask the overall impact of more stringent regulations by pooling unaffected and affected regions.JEL Classification: Q25, Q28, H00, L51, R1The authors wish to thank to Michael Crew, Anthony Heyes, an anonymous referee, Werner Antweiler, Randy Becker, Wayne Gray, Shelby Gerking, Michael Greenstone, Vern Henderson, and Arik Levinson. Participants at various university seminars and conferences also lent useful insights to this line of research.     

Analyzing the effect of dynamically assigned treatments using duration models,binary treatment models,and panel data models

Often, the moment of a treatment and the moment at which the outcome of interest occurs are realizations of stochastic processes with dependent unobserved determinants. Notably, both treatment and outcome are characterized by the moment they occur. In this paper, we compare different methods of inference of the treatment effect. We argue that the timing of the treatment relative to the outcome conveys useful information on the treatment effect, which is discarded in binary treatment frameworks. Thanks to participants at the Tenth Panel Data Conference in Berlin, 2002, in particular to our discussant Bo Honoré, for helpful comments. Jaap Abbring acknowledges financial support by the Royal Netherlands Academy of Arts and Sciences.     

Evaluating generalizability and parameter consistency in learning models

A new evaluation method is proposed for comparing learning models used for predicting decisions based on experience. The method is based on the generalization of models' predictions at the individual level. First, it evaluates the ability to make a priori predictions for decisions in new tasks using parameters from different tasks performed by an individual decision-maker. Second, it evaluates the consistency of parameters estimated in different tasks performed by the same person. We use this method to examine two rules for updating past experience with payoff feedback: The Delta rule, where only the chosen option is updated; and a Decay-Reinforcement rule, where additionally, non-chosen options are discounted. The results reveal that although the Decay-Reinforcement rule fits the data better, it has poor generality and parameter consistency at the individual level. The current method thus improves the ability to select models based on their correspondence to consistent characteristics within individual decision-makers.     

创意经济评估分析与测量方法研究

对全球创意经济现状进行衡量是近年来各国的一致需求。以制定理性政策的必要条件为着眼点,用综述的方法探索和总结国际前沿的创意经济分析与测量方法。归纳创意经济系统的特点,指明创意经济不只是经济问题,而是涉及社会、文化和环境问题的综合系统。同时,针对中国创意经济现有评估体系及其面临的挑战,提出有针对性的对策建议和研究方向。     

Productivity and R&D sources: evidence for Catalan firms

This paper draws on a sample of innovative Catalan firms to identify how two main sources of innovation – internal R&D and external R&D acquisition – affect productivity in the manufacturing and service industries. The sample comprises 1612 innovative firms from the fourth European Community Innovation Survey (CIS-4) during the period 2002–2004. We compare empirical results when applying the usual OLS and quantile regression techniques controlling with a non-parametric sample selection. Our results indicate the different patterns that are attributable to the two sources of innovation as we move up from lower to higher conditional quantiles. First, the marginal effect of internal R&D on productivity decreased as we moved up to higher productivity levels. Second, the marginal effect of external R&D acquisition increased as we moved up to higher productivity levels. Finally, empirical results show significant complementarities between internal and external R&D, which are higher for knowledge-intensive service sectors.     

环境税经济效应的扩展分析及其政策启示

本文从环境税的理论基础入手,回顾了环境税经济效应分析的几个有代表性的基本观点,认真分析了环境税经济效应传统分析中存在的局限性,并在此基础上将"经济结构优化效应"和"国际贸易受益效应"引入到环境税经济效应分析当中,大大拓宽了环境税经济效应分析的研究视角,最后在环境税经济效应创新性分析的基础上提出了相应的环境税政策启示。     

Migration and intention to return: entrepreneurial intentions of the diaspora in post-conflict economies

This article examines the intentions of the diaspora to return to their homeland and engage in entrepreneurial activity. We focus on post-conflict economies where the development potential of return migration is significant. Our article demonstrates that the entrepreneurial intentions of returning diaspora are affected by their level of trust and perceptions of risk in institutions at home. Through a survey of diaspora returning to Kosovo, the paper finds that business experience has a negative relationship on probability to return, but it has a positive relationship on entrepreneurial intentions. However, those with professional and qualified jobs are more likely to have intentions to return, but less likely to have entrepreneurial intentions. The paper contributes to academic research on the central importance of institutions to post-conflict development, demonstrating that by enhancing the institutional environment investment can be attracted home.     

Hedonic Price Analysis and Selectivity Bias

Hedonic valuation of quality attributes can be misleading when theassumption that these attributes are exogenous to sample selection isviolated. This paper considers the simultaneity between hedonic valuationand sample selection in the context of a model of producer behavior andinvestigates empirically the case where land is demanded for use as an inputeither in agricultural production or in touristic development. The empiricalanalysis suggests that failing to correct for sample selection results in abiased valuation of the effect of water salinity on agricultural land.     

Alcohol consumption,censorship and misjudgement

In the study of the economic determinants of alcohol consumption, there is an under-appreciated issue of sample selectivity as consumption is often not fully observed. Sample selectivity involves ignoring consumption below a censorship cut-off level. This article estimates a demand system for beer, wine and spirits with and without allowance for selectivity. Then using a simulation approach, it examines the impact of misjudgement in the censorship level on the estimated demand parameters. A mean squared error (MSE) criterion is suggested for determining the appropriate censorship level.     

A Micro‐Econometric Analysis of the Antipoverty Effect of Social Cash Transfers in Italy

We analyze the anti‐poverty effect of social cash transfers using a micro‐econometric approach. Aggregate analyses, based on comparing average poverty indicators before and after public transfers, fail to address who receives the transfers and how the transfers are distributed among the poor. We consider three dichotomous outcome variables: (i) poverty status before the receipt of transfers; (ii) the receipt of transfers; and (iii) poverty status after the receipt of transfers. We use a trivariate probit model with sample selection, connecting the outcome variables to the characteristics of the household and its head. Our empirical results highlight that the Italian social transfers system overprotects certain household typologies at the expense of others, as social transfers are primarily awarded to employees with permanent positions and the elderly, while the system is not generous enough to large households with dependant children, the self‐employed, temporary contract workers, and the unemployed.     

政策性金融创新探究--论政策性银行和社会保险可能的融合

本文的创新之处在于首次将社会保险纳入政策性金融的范畴,论证了社会保险的本质决定了它与政策性银行一样同属于政策性金融.进而认为社会保险可通过政策性银行业务进行某种形式的融合以发挥政策金融的整体优势,使国家信用在二者之间融会贯通,充分运用,减少国家信用外溢.在当前相互独立的政策性银行和社会保险之间构架联系的桥梁,使政策性资金在政策性金融机构进行体内循环,以解决当前政策性银行面临的资金来源的困境和社会保险基金管理及运用中存在的一些不容忽视的问题.较为详尽地论证了政策性金融进行融合的必要性和可行性,并在此基础上对政策性金融融合的方式进行了探讨.     

碳税对我国的影响及其政策响应

二氧化碳(CO2)是引起全球气候变化的最重要的温室气体(GHG)之一。温室气体的减排是当前国际社会普遍关注的热点环境问题。碳税常常被认为是成本有效的碳减排政策工具,目前已有一些国家征收碳税或能源税。文章介绍了碳税的理论基础及其在一些国家的征收实践,总结和分析了国内外一些学者关于实施碳税对温室气体减排、对经济和能源系统的影响的研究结果,并在此基础上讨论了我国对碳税制度的政策响应和对策。     

发展中国家的资本账户开放:问题和抉择

无论是对发达国家还是发展中国家资本账户的开放性研究,人们都倾注了大量的精力.但是回顾这争鸣的百家,对发展中国家资本账户开放后的经济效应,也莫衷一是.尽管如此,被经济学界广泛承认的事实是,资本账户开放后的效应是因各国情况不同而不同的,需要决策者审时度势,慎之又慎,尤其要避免伴随资本账户开放而可能带来的金融冲击甚至危机.     

Party Discipline and Environmental Policy: The Role of “Smoke‐filled Back Rooms”*

We adopt the view that greater party discipline induces legislators to commit to promised policies after being elected. We then develop the hypothesis that the effect of party discipline on the stringency of environmental policy is conditional on the degree of government corruption. Our empirical work suggests that greater party discipline results in more stringent environmental policies when the level of corruption is relatively low, but in weaker policies when the level of corruption is comparatively high.     

政策缝隙、风险源与社会稳定风险评估

公共政策在中国发展进程中成为经济增长、体制改革和国家转型的依赖工具、手段和路径。政策的后果也是社会不稳定的一个来源。在推进公共政策的社会稳定风险评估过程中,关键的问题是如何识别风险源。文章在案例研究的基础上,提炼出"政策缝隙"概念,用来理解社会不稳定的来源。政策缝隙体现在对实质性利益调整或再分配的过程中,政策文本出现了时间、空间和不同社会群体之间的不一致现象,而政策不一致即成为风险源。在评估出风险源基础上,实现源头治理的关键是以科学和民主的方式来制定精细化方案弥补政策缝隙。     

The Corporate State,Economic Performance,and Social Policy

We use the Survey of Consumer Finances to analyze changes in U.S. household debt between 1989 and 2013. We focus on how income and debt levels have changed, and what this means for future economic growth and living standards. Prior to the Great Recession, U.S. households had record high debt levels and record low savings rates. Highly leveraged consumption boosted economic growth. However, large debt burdens have led many families to deleverage. Our study finds that deleveraging has been insufficient. Although debt payments have fallen relative to household income, this is mainly due to low interest rates. Debt levels, especially for home mortgages, remain high by historical standards and portend continued stagnation due to lower consumer spending.     

流动人口的经济效应及其政策建议

随着我国经济的快速发展,大量人口流入城市,为城市的基础建设和经济增长做出了很大的贡献.流动人口在对经济发展产生积极作用的同时,也存在着客观方面的负经济效应,即带来一系列社会成本.减少流动人口外部不经济是实现经济效益最大化的基本途径.