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Is that Really a Kuznets Curve? Turning Points for Income Inequality in China 这真的是库兹涅茨曲线吗?中国收入不平等的转折点
Pub Date : 2021-08-01 DOI: 10.3386/w29199
M. Ravallion, Shaohua Chen
The path of income inequality in post-reform China has been widely interpreted as “China’s Kuznets curve.” We show that the Kuznets growth model of structural transformation in a dual economy, alongside population urbanization, has little explanatory power for our new series of inequality measures back to 1981. Our simulations tracking the partial “Kuznets derivative” of inequality with respect to urban population share yield virtually no Kuznets curve. More plausible explanations for the inequality turning points relate to determinants of the gap between urban and rural mean incomes, including multiple agrarian policy reforms. Our findings warn against any presumption that the Kuznets process will assure that China has passed its time of rising inequality. More generally, our findings cast doubt on past arguments that economic growth through structural transformation in poor countries is necessarily inequality increasing, or that a turning point will eventually be reached after which that growth will be inequality decreasing. Institutional subscribers to the NBER working paper series, and residents of developing countries may download this paper without additional charge at www.nber.org.
改革开放后中国收入不平等的路径被广泛解读为“中国的库兹涅茨曲线”。我们发现,库兹涅茨的二元经济结构转型增长模型,以及人口城市化,对我们1981年新的一系列不平等措施几乎没有解释力。我们的模拟跟踪不平等的部分“库兹涅茨导数”相对于城市人口份额实际上没有得到库兹涅茨曲线。对不平等转折点更合理的解释与城乡平均收入差距的决定因素有关,包括多项农业政策改革。我们的研究结果警告人们,不要想当然地认为库兹涅茨进程将确保中国度过不平等加剧的时期。更一般地说,我们的研究结果对过去的观点提出了质疑,即贫穷国家通过结构转型实现的经济增长必然会加剧不平等,或者最终会达到一个转折点,之后的增长将使不平等减少。国家经济研究局工作论文系列的机构订阅者和发展中国家的居民可以在www.nber.org免费下载本文。
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引用次数: 15
Economic Development, the Nutrition Trap and Metabolic Disease 经济发展、营养陷阱和代谢性疾病
Pub Date : 2021-08-01 DOI: 10.3386/w29132
N. Luke, Kaivan Munshi, A. Oommen, Swapnil Singh
This research provides a single explanation for: (i) the persistence of malnutrition and (ii) the increased prevalence of metabolic disease (diabetes, hypertension, cardiovascular disease) among normal weight individuals with economic development. Our model is based on a set point for BMI or bodyweight that is adapted to conditions of scarcity in the pre-modern economy, but which subsequently fails to adjust to rapid economic change. During the process of development, some individuals thus remain at their low-BMI set point, despite the increase in their consumption, while others who have escaped the nutrition trap (but are not necessarily overweight) are at increased risk of metabolic disease. The model and the underlying biological mechanism, which are validated with micro-data from India, Indonesia and Ghana can jointly explain inter-regional (Asia-Africa) differences in nutritional status and the prevalence of diabetes.
这项研究提供了一个单一的解释:(i)营养不良的持续存在和(ii)随着经济发展,正常体重的个体中代谢性疾病(糖尿病、高血压、心血管疾病)的患病率增加。我们的模型基于BMI或体重的设定值,该设定值适应了前现代经济中物质匮乏的条件,但随后却无法适应快速的经济变化。因此,在发育过程中,尽管一些人的摄入量增加,但他们仍保持在低bmi设定点,而其他逃脱了营养陷阱(但不一定超重)的人患代谢性疾病的风险增加。印度、印度尼西亚和加纳的微观数据验证了该模型及其潜在的生物学机制,可以共同解释亚洲-非洲地区营养状况和糖尿病患病率的差异。
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引用次数: 5
Can Restorative Justice Conferencing Reduce Recidivism? Evidence from the Make-it-Right Program 恢复性司法会议能减少再犯吗?来自改正计划的证据
Pub Date : 2021-08-01 DOI: 10.3386/w29150
Yotam Shem-Tov, S. Raphael, A. Skog
This paper studies the effect of a restorative justice intervention targeted at youth ages 13 to 17 facing felony charges of medium severity (e.g., burglary, assault). Eligible youths were randomly assigned to participate in the Make-it-Right (MIR) restorative justice program or to a control group in which they faced criminal prosecution. We estimate the effects of MIR on the likelihood that a youth will be rearrested in the four years following randomization. Assignment to MIR reduces the likelihood of a rearrest within six months by 19 percentage points, a 44 percent reduction relative to the control group. Moreover, the reduction in recidivism persists even four years after randomization. Thus, our estimates show that juvenile restorative justice conferencing can reduce recidivism among youth charged with relatively serious offenses and can be an effective alternative to traditional criminal justice practices.
本文研究了针对13至17岁面临中等严重重罪指控(如入室盗窃、殴打)的青少年进行恢复性司法干预的效果。符合条件的青少年被随机分配参加“改过自新”(MIR)恢复性司法项目,或被分配到面临刑事起诉的对照组。我们估计了MIR对青少年在随机化后的四年内再次被捕的可能性的影响。分配到MIR使六个月内再次被捕的可能性降低了19个百分点,与对照组相比降低了44%。此外,即使在随机化四年后,累犯的减少仍然存在。因此,我们的估计表明,青少年恢复性司法会议可以减少被指控犯有相对严重罪行的青少年的再犯,并且可以成为传统刑事司法实践的有效替代方案。
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引用次数: 3
Procyclical Fiscal Policy and Asset Market Incompleteness 顺周期财政政策与资产市场不完全性
Pub Date : 2021-08-01 DOI: 10.3386/w29149
Andrés Fernández, Daniel Guzmán, Ruy Lama, Carlos A. Végh
To explain the fact that government spending and tax policy are procyclical in emerging and developing countries, we develop a model for the joint behavior of optimal tax rates and government spending over the business cycle. Our set-up relies on financial frictions, which have been shown to be critical features of emerging markets, captured by various degrees of asset market incompleteness as well as varying levels of debt-elastic interest rate spreads. We first uncover a novel theoretical result within a simple static framework: incomplete markets can account for procyclical government spending but not necessarily procyclical tax policy. Explaining procyclical tax policy also requires that the ratio of private to public consumption comoves positively with the business cycle, which leads to larger fluctuations in the tax base. We then show that the procyclicality of tax policy holds in a more realistic DSGE model calibrated to emerging markets. Finally, we illustrate how larger financial frictions, which amplify the business cycle through more procyclical fiscal policies, have sizeable Lucas-type welfare costs. Institutional subscribers to the NBER working paper series, and residents of developing countries may download this paper without additional charge at www.nber.org.
为了解释新兴国家和发展中国家政府支出和税收政策是顺周期的这一事实,我们建立了一个商业周期中最优税率和政府支出共同行为的模型。我们的设置依赖于金融摩擦,这已被证明是新兴市场的关键特征,体现在不同程度的资产市场不完整性以及不同水平的债务弹性利差上。我们首先在一个简单的静态框架内发现了一个新的理论结果:不完全市场可以解释顺周期的政府支出,但不一定解释顺周期的税收政策。解释顺周期税收政策还要求私人消费与公共消费之比与商业周期呈正相关,从而导致税基的较大波动。然后,我们证明了税收政策的顺周期性在一个更现实的针对新兴市场校准的DSGE模型中成立。最后,我们说明了更大的金融摩擦如何通过更顺周期的财政政策放大商业周期,从而产生相当大的卢卡斯型福利成本。国家经济研究局工作论文系列的机构订阅者和发展中国家的居民可以在www.nber.org免费下载本文。
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引用次数: 4
Racial Disparities in the Health Effects from Air Pollution: Evidence from Ports 空气污染对健康影响的种族差异:来自港口的证据
Pub Date : 2021-07-01 DOI: 10.2139/ssrn.3901686
K. Gillingham, PeiLing. Huang
This study examines the uneven effects of air pollution from maritime ports on physical and mental health across racial groups. We exploit quasi-random variation in vessels in port from weather events far out in the ocean to estimate how port traffic influences air pollution and human health. We find that one additional vessel in a port over a year leads to 3.0 hospital visits per thousand Black residents within 25 miles of the port and only 1.0 per thousand for whites. We assess a port-related environmental regulation and show that the policy can help alleviate racial inequalities in health outcomes.
这项研究考察了海港空气污染对不同种族人群身心健康的不均衡影响。我们利用港口船舶在遥远海洋天气事件中的准随机变化来估计港口交通如何影响空气污染和人类健康。我们发现,在一年内,港口每增加一艘船,港口25英里内每千名黑人居民就会有3.0人去医院,而白人居民只有1.0人去医院。我们评估了一项与港口相关的环境法规,并表明该政策有助于缓解健康结果中的种族不平等。
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引用次数: 8
Recreational Marijuana Laws and the Use of Opioids: Evidence from Nsduh Microdata 娱乐性大麻法律和阿片类药物的使用:来自Nsduh微数据的证据
Pub Date : 2021-07-01 DOI: 10.3386/w29087
Mir M. Ali, Chandler B McCellan, R. Mutter, D. Rees
Recent studies have concluded that state laws legalizing medical marijuana can reduce deaths from opioid overdoses. Using data from the National Survey on Drug Use and Health, a survey uniquely suited to assessing drug misuse, we examine the relationship between recreational marijuana laws (RMLs) and the use of opioids. Standard difference-in-differences (DD) regression estimates indicate that RMLs do not affect the likelihood of misusing prescription pain relievers such as OxyContin, Percocet, and Vicodin. Although DD regression estimates provide evidence that state laws legalizing recreational marijuana can reduce the frequency of misusing prescription pain relievers, event-study estimates are noisy and suggest that any effect on the frequency of misuse is likely transitory. Institutional subscribers to the NBER working paper series, and residents of developing countries may download this paper without additional charge at www.nber.org.
最近的研究得出结论,使医用大麻合法化的州法律可以减少阿片类药物过量导致的死亡。使用国家药物使用和健康调查的数据,一项特别适合评估药物滥用的调查,我们研究了娱乐性大麻法律(RMLs)与阿片类药物使用之间的关系。标准差中差(DD)回归估计表明rml不影响滥用处方止痛药的可能性,如奥施康定、Percocet和Vicodin。虽然DD回归估计提供的证据表明,州法律使娱乐性大麻合法化可以减少处方止痛药的滥用频率,但事件研究估计是嘈杂的,并且表明任何对滥用频率的影响都可能是暂时的。国家经济研究局工作论文系列的机构订阅者和发展中国家的居民可以在www.nber.org免费下载本文。
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引用次数: 4
Regulatory Approval and Expanded Market Size 监管部门批准,市场规模扩大
Pub Date : 2021-06-01 DOI: 10.3386/W28889
Benjamin L. Berger, A. Chandra, Craig L. Garthwaite
Regulatory review of new medicines is often viewed as a hindrance to innovation by increasing the hurdle to bring products to market. However, a more complete accounting of regulation must also account for its potential market expanding effects through quality certification. We combine data on FDA approvals for follow-on indications and patient-level data on utilization, and examine whether FDA approval of a follow-on indication increases the use of a drug for that indication. We find 5 facts for the market-expanding role of regulation: (1) follow-on approvals increase the share of patients taking a drug with that indication by 4.1 percentage points, or 40% increase over baseline use, at the time of approval; (2) there is little market learning prior to or following the approval of the follow-on indication, suggesting that such approvals fully certify the new use; (3) the effect of these approvals is larger for uses in a different disease area than previous indications, an increase equivalent to over 4 � years of market-learning; (4) it is FDA approval, not the initiation of clinical trials that generate the expansion in market size; (5) the market expansion is consistent with physicians prescribing the medicines more because of higher perceived benefits, not reduced administrative costs.
新药的监管审查往往被视为创新的障碍,因为它增加了将产品推向市场的障碍。然而,更完整的监管核算还必须考虑到其通过质量认证的潜在市场扩张效应。我们结合FDA批准后续适应症的数据和患者层面的使用数据,并检查FDA批准后续适应症是否会增加该适应症药物的使用。我们发现了监管扩大市场作用的5个事实:(1)在批准时,后续批准使服用该适应症药物的患者比例增加了4.1个百分点,或比基线使用量增加了40%;(2)在后续适应症批准之前或之后几乎没有市场学习,表明此类批准完全证明了新用途;(3)与以前的适应症相比,这些批准对不同疾病领域的使用效果更大,相当于增加了超过4年的市场学习时间;(4)是FDA的批准,而不是临床试验的启动导致市场规模的扩大;(5)市场扩张与医生更多地开处方是因为更高的感知效益,而不是降低管理成本是一致的。
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引用次数: 2
Judging Under Public Pressure 公众压力下的评判
Pub Date : 2021-06-01 DOI: 10.3386/W28894
Alma Cohen, Florian Auferoth, Z. Neeman
Individuals who engage in “judging” – that is, rendering a determination in a dispute or contest between two parties – might be influenced by public pressure to favor one of the parties. Many rules and arrangements seek to insulate such individuals from public pressure or to address the effects of such pressure. We study this subject empirically, investigating the circumstances in which public pressure is more and less likely to affect judging. Using detailed data from the Bundesliga, Germany’s top soccer league, our analysis of how crowd pressure affects the decisions of referees yields two key insights. First, we show that crowd pressure biases referee’s decisions in favor of the home team for those decisions that cannot be unam-biguously identified as erroneous but not for those decisions that can. In particular, a referee exhibits a bias in favor of the home team with respect to more subjective decisions such as the showing of yellow cards (cautions), which is based on the referee’s judgment, but not with respect to more objective de-cisions such as validating goals and awarding penalty kicks, where live TV coverage often allows for objective identification of errors. Second, we show that the effect of crowd pressure on referee decisions depends on the extent to which such pressure is viewed by the referee as understandable or reasonable (or even justified). Specifically, a referee’s bias in favor of the home team in yellow card issuance is strengthened after the referee makes an objectively identifiable error against the home team and thus might view crowd heckling as understandable. This effect is stronger when the referee’s error is costlier to the home team because the game is more important or the error is more consequential due to the closeness of the game at the time of the error. The introduction of VAR (Video Assistant Referee) technology in 2017 and the restrictions im-posed due to Covid-19 pandemic, which caused games to be played without crowds for the second half of the 2019–20 season, allow us to test our results under three different regimes (pre-VAR, VAR, and VAR/no-crowd). Inspection of the results under these three different regimes serves to reinforce them. As expected, VAR reduces the number of referee errors, but the pattern of no bias with respect to errors is preserved. VAR has no effect on the number of yellow cards, or on the number of goals. Once the crowd disappears, so does the home advantage in goals. Referee errors are unaffected, but the home bias with respect to yellow cards disappears as well. This confirms the effect that the crowd has on referees’ more subjective decisions.
参与"判断"的个人——即在双方的争端或竞争中作出裁决——可能会受到公众压力的影响,倾向于其中一方。许多规则和安排试图使这些人免受公众压力或处理这种压力的影响。我们对这个问题进行了实证研究,调查了公众压力或多或少影响判断的情况。利用德国顶级足球联赛德甲(Bundesliga)的详细数据,我们分析了人群压力如何影响裁判的决定,得出了两个关键见解。首先,我们表明,对于那些不能被明确认定为错误的判罚,而不是那些可以被明确认定为错误的判罚,观众压力会使裁判的判罚有利于主队。特别是,裁判在主队的主观判罚上,比如出示黄牌(警告),表现出偏向主队的倾向,这是基于裁判的判断,但在更客观的判罚上,比如确认进球和判罚点球,则不然,因为电视直播通常允许客观地识别错误。其次,我们证明了人群压力对裁判判罚的影响取决于裁判认为这种压力是可以理解的或合理的(甚至是正当的)程度。具体来说,当主裁判对主队犯了一个客观上可识别的错误后,主队在出示黄牌时对主队有利的偏见就会加强,因此可能会认为观众的诘问是可以理解的。当裁判的错误对主队来说代价更大,因为比赛更重要,或者由于错误发生时比赛的激烈程度,错误的后果更严重时,这种影响就会更强。2017年引入的VAR(视频助理裁判)技术,以及由于Covid-19大流行而实施的限制,导致2019-20赛季下半赛季的比赛没有观众,这使我们能够在三种不同的制度下测试我们的结果(VAR前,VAR和VAR/无观众)。检查这三种不同制度下的结果有助于加强这些制度。正如预期的那样,VAR减少了裁判错误的数量,但对于错误没有偏见的模式被保留了下来。VAR对黄牌的数量和进球的数量没有影响。一旦人群消失,主场进球优势也随之消失。裁判的失误不会受到影响,但是对于黄牌的主场偏见也会消失。这证实了观众对裁判更加主观的判罚的影响。
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引用次数: 1
Delay the Pension Age or Adjust the Pension Benefit? Implications for Labor Supply and Individual Welfare in China 推迟领取养老金年龄还是调整养老金待遇?对中国劳动力供给和个人福利的启示
Pub Date : 2021-05-30 DOI: 10.2139/ssrn.3858898
Yuanyuan Deng, Hanming Fang, Katja Hanewald, Shang Wu
We develop and calibrate a life-cycle model of labor supply and consumption to quantify the implications of alternative pension reforms on labor supply, individual welfare, and government budget for China’s basic old-age insurance program. We focus on urban males and distinguish low-skilled and high-skilled individuals, who differ in their preferences, health and labor income dynamics, and medical expense processes. We use the calibrated model to evaluate three potential pension reforms: (i) increasing the pension eligibility age from 60 to 65, but keeping the current pension benefit rule unchanged; (ii) keeping the pension eligibility age at 60, but proportionally lowering pension benefits so that the pension program’s budget is the same as under Reform (i); and (iii) increasing the pension eligibility age to 65 and simultaneously increasing the pension benefits so that individuals of both skill types attain the same individual welfare levels as in the status quo. We find that relative to the baseline, both Reforms (i) and (ii) can substantially improve the budgets of the pension system, but at the cost of substantial individual welfare loss for both skill types. In contrast, we find that Reform (iii) can modestly improve the budget of the pension system while ensuring that both skill types are as well off as in the status quo. We find that Reforms (i) and (ii) slightly increases, but Reform (iii) slightly decreases, the overall labor supply.
我们开发并校准了劳动力供给和消费的生命周期模型,以量化中国基本养老保险计划的替代养老金改革对劳动力供给、个人福利和政府预算的影响。我们重点关注城市男性,并区分低技能和高技能个体,他们在偏好、健康和劳动收入动态以及医疗费用流程方面存在差异。我们使用校准的模型来评估三种潜在的养老金改革:(i)将养老金资格年龄从60岁提高到65岁,但保持当前的养老金福利规则不变;(ii)将领取养老金的年龄保持在60岁,但按比例降低养老金福利,使养老金计划的预算与改革(i)相同;(三)将领取养老金的年龄提高到65岁,同时提高养老金福利,使两种技能类型的个人都能获得与现状相同的个人福利水平。我们发现,相对于基线,改革(i)和(ii)都可以大幅改善养老金体系的预算,但代价是两种技能类型的个人福利损失很大。相比之下,我们发现改革(iii)可以适度改善养老金制度的预算,同时确保两种技能类型的现状。我们发现,改革(一)和(二)略有增加,但改革(三)略有减少,整体劳动力供给。
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引用次数: 1
The Effect of Education on the Relationship between Genetics, Early-Life Disadvantages, and Later-Life Ses 教育对遗传、早期生活劣势和后期生活劣势关系的影响
Pub Date : 2021-05-01 DOI: 10.3386/W28750
S. Barcellos, Leandro S. Carvalho, P. Turley
This paper investigates whether education weakens the relationship between early-life disadvantages and later-life SES. We use three proxies for advantage that we show are independently associated with SES in middle-age. Besides early, favorable family and neighborhood conditions, we argue that the genes a child inherits also represent a source of advantages. Using a regression discontinuity design and data for over 110,000 individuals, we study a compulsory schooling reform in the UK that generated exogenous variation in schooling. While the reform succeeded in reducing educational disparities, it did not weaken the relationship between early-life disadvantages and wages. This implies that advantaged children had higher returns to schooling. We exploit family-based random genetic variation and find no evidence that these higher returns were driven by genetically-influenced individual characteristics such as innate ability or skills.
本文研究了教育是否削弱了早期生活劣势与后期社会经济地位之间的关系。我们用三个代理来表示优势,我们发现它们与中年时的社会地位独立相关。除了早期良好的家庭和邻里条件外,我们认为儿童遗传的基因也代表了优势的来源。使用回归不连续设计和超过110,000个人的数据,我们研究了英国义务教育改革产生的外生教育变化。虽然改革成功地缩小了教育差距,但它并没有削弱早期生活劣势与工资之间的关系。这意味着家境优越的孩子上学的回报更高。我们利用基于家庭的随机遗传变异,发现没有证据表明这些更高的回报是由遗传影响的个体特征(如天生的能力或技能)驱动的。
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引用次数: 9
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