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University of Milan Bicocca Department of Economics最新文献

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Project Aid and Firm Performance 项目援助与企业绩效
Pub Date : 2021-09-02 DOI: 10.2139/ssrn.3921495
S. Marchesi, T. Masi, S. Paul
This paper evaluates the effect of development project aid from the World Bank and China on firms' sales growth, using a large dataset of 110864 firms, spanning 121 countries between 2001 and 2016. We find that, contrary to the World Bank, Chinese ODA projects increase, on average, firm sales and, compared to sector-specific, Chinese region-specific aid positively affect firm performance. Finally, we show that the positive effect of Chinese aid is stronger for firms lacking transport infrastructure (and with better electricity provision), suggesting that aid may improve firm performance by releasing their infrastructure constraints.
本文利用2001年至2016年间121个国家的110864家企业的大型数据集,评估了世界银行和中国的发展项目援助对企业销售增长的影响。我们发现,与世界银行相反,中国的官方发展援助项目平均增加了企业销售额,与特定部门相比,中国针对特定地区的援助对企业绩效产生了积极影响。最后,我们表明,中国援助对缺乏交通基础设施(以及电力供应较好的企业)的积极影响更大,这表明援助可能通过释放基础设施限制来改善企业绩效。
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引用次数: 4
Estimating the Ex-ante and the Ex-post Effects of Chinese Outward FDI 中国对外直接投资的事前和事后效应评估
Pub Date : 2021-05-31 DOI: 10.1111/TWEC.13161
D. Baiardi, V. Gattai, Piergiovanna Natale
This study investigates the relationship between outward Foreign Direct Investment (FDI) and the performance of Chinese enterprises. Using firm-level panel data over the period 2008–2014, we introduce a taxonomy of outward FDI that accounts for the decision to invest abroad and the location of foreign affiliates. Through different specifications, we show systematic differences in performance between FDI starters and non-starters two years before and two years after the first investment by the starters. This fact points to the existence of strong ex-ante and ex-post effects of Chinese outward FDI. On one hand, we provide evidence—so far not present in the literature—that the best performing Chinese firms self-select into outward FDI. On the other hand, controlling for endogeneity through propensity score matching (PSM) techniques, we detect significant learning effects from outward FDI to firm-level performance. Interestingly, these effects are heterogeneous with respect to destination, with deeper learning for Chinese enterprises investing in Asia.
本文研究了对外直接投资(FDI)与中国企业绩效之间的关系。利用2008-2014年期间的公司层面面板数据,我们引入了对外直接投资的分类,该分类考虑了海外投资决策和外国子公司的所在地。通过不同的规范,我们显示了首次投资前两年和首次投资后两年FDI启动者和非启动者在绩效上的系统性差异。这说明中国对外直接投资存在较强的事前和事后效应。一方面,我们提供了迄今为止尚未在文献中出现的证据,即表现最好的中国公司会自主选择对外直接投资。另一方面,通过倾向得分匹配(PSM)技术控制内生性,我们发现对外直接投资对企业绩效有显著的学习效应。有趣的是,这些影响在目的地方面是不同的,中国企业在亚洲投资需要更深入的学习。
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引用次数: 4
Cover Effects on Citations Uncovered: Evidence from Nature 被揭露引文的覆盖效应:来自自然的证据
Pub Date : 2019-10-01 DOI: 10.2139/ssrn.3474233
P. Battiston, P. Sacco, L. Stanca
Despite the prominent role played by bibliometric indicators for evaluating research, progress in pinning down the determinants of citation ows has so far been hindered by endogeneity issues. Based on 30 years of bibliometric data, we exploit a Regression Discontinuity Design to causally identify the effects that an article featured on the cover of the journal Nature has on citations to all articles by its authors. We confirm that, over time, cover articles are cited significantly more than non-cover articles, with this difference being long-lasting. However, when considering all articles by Nature authors, we find evidence of a crowding-out effect: the publication of a cover article causes citations to previous articles by its authors to decline sharply relative to citations to articles by non-cover authors.
尽管文献计量学指标在评价研究方面发挥了突出作用,但迄今为止,在确定引文占比决定因素方面的进展一直受到内生性问题的阻碍。基于30年的文献计量数据,我们利用回归不连续设计(Regression Discontinuity Design)来确定《自然》杂志封面上的一篇文章对其作者所有文章被引用的影响。我们证实,随着时间的推移,封面文章被引用的次数明显多于非封面文章,而且这种差异是持久的。然而,当考虑到《自然》作者的所有文章时,我们发现了挤出效应的证据:一篇封面文章的发表导致其作者先前文章的引用量相对于非封面作者的文章的引用量急剧下降。
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引用次数: 2
Populism, the Backlash Against Ruling Politicians and the Possible Malfunctioning of Representative Democracy 民粹主义、对执政人士的反弹和代议制民主可能出现的失灵
Pub Date : 2019-08-01 DOI: 10.2139/ssrn.3438897
M. Gilli, Elena Manzoni
The aim of this paper is to investigate the links between lack of trust in ruling politicians and the functioning of a representative democracy. Within a standard principal-agent model of democracy, we show how lack of trust by citizens as reflected by passive beliefs updating may lead to the malfunctioning of representative democracy. We highlight how de facto accountability crucially depends on out-of-equilibrium beliefs, and that this is indeed descriptive of a substantive feature of public opinion that affects the functioning of democracy. Specifically, we show that effective accountability needs more than simple retrospective voting, as it requires voters to believe in the existence of good politicians that always choose according to voters’ interests, so that a deviation from bad policies can happen only because the leader is congruent. In this case, the unique equilibrium is an efficient one that maximizes voters’ welfare. However, if, on the other hand, the citizens share an overall lack of trust in ruling elites, then there is another inefficient equilibrium, where even the congruent politician behaves badly because of the adverse but rational voters’ behavior. This inefficient equilibrium does not depend on fake news or on distorted beliefs or, again, on voters’ heterogeneous preferences, since the voters' perfectly observe the quality of the policy implemented by the government, are fully rational and share the same interests. This result might contribute to explain the increasing negative perceptions on the working of democracy as due to a self-fulfilling equilibrium.
本文的目的是调查对执政政治家缺乏信任与代议制民主运作之间的联系。在一个标准的民主委托-代理模型中,我们展示了由被动的信念更新所反映的公民缺乏信任如何导致代议制民主的失灵。我们强调,事实上的问责如何至关重要地取决于失衡的信念,这确实描述了影响民主运作的公众舆论的一个实质性特征。具体来说,我们表明有效的问责制需要的不仅仅是简单的回顾性投票,因为它要求选民相信存在优秀的政治家,他们总是根据选民的利益进行选择,因此只有在领导人是一致的情况下,才会出现偏离糟糕政策的情况。在这种情况下,唯一均衡是使选民福利最大化的有效均衡。然而,另一方面,如果公民对统治精英普遍缺乏信任,那么就会出现另一种低效均衡,在这种均衡中,即使是一致的政治家也会因为不利但理性的选民行为而表现糟糕。这种低效的均衡不依赖于假新闻或扭曲的信念,也不依赖于选民的异质偏好,因为选民完全观察到政府实施的政策的质量,是完全理性的,并且拥有相同的利益。这一结果可能有助于解释对民主运作的日益负面的看法是由于一种自我实现的平衡。
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引用次数: 0
Does Social Context Affect Poverty? The Role of Religious Congregations 社会背景会影响贫困吗?宗教团体的作用
Pub Date : 2019-06-01 DOI: 10.2139/ssrn.3398438
A. Poggi
This paper contributes to the literature that aims at identifying and measuring the impact of social context on individual-level outcomes. We focus on religious congregations (social groups with which Christian worshipers feel associated) and investigate congregation effects on individual poverty using U.S. data and a multilevel approach. In order to correct for selection effects, we model congregation choice using a multinomial logit model and subsequently incorporate correction components into the multilevel model of congregation effects. Our empirical results support the existence of congregation effects and, therefore, the importance of social context on individual poverty. We find that congregation size, recreational services, initiatives to integrate new members and behavior standards play important roles in shaping the probability that churchgoers experience poverty. Individual behavior (in terms of participation in the religious life of congregations) also matters. These finding are in line with the idea that congregations’ activities can foster social interactions and cooperation reducing individual probability of experiencing poverty.
本文为旨在识别和衡量社会背景对个人水平结果的影响的文献做出了贡献。我们关注宗教集会(与基督教崇拜者有联系的社会团体),并使用美国数据和多层次方法调查集会对个人贫困的影响。为了校正选择效应,我们使用多项logit模型对会众选择进行建模,并随后将校正成分纳入会众效应的多层模型中。我们的实证结果支持聚集效应的存在,因此,社会背景对个人贫困的重要性。我们发现,教会规模、娱乐服务、整合新成员的举措和行为标准在塑造去教堂的人经历贫困的可能性方面发挥着重要作用。个人行为(就参与教会的宗教生活而言)也很重要。这些发现与“教会活动可以促进社会互动和合作,减少个人经历贫困的可能性”的观点一致。
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引用次数: 0
Activating Women Cognitive Abilities: Impact of a Financial Literacy Pilot Program in India 激活女性认知能力:印度金融素养试点项目的影响
Pub Date : 2019-05-01 DOI: 10.2139/ssrn.3396881
L. dalla Pellegrina, Giorgio Di Maio, P. Landoni, Beatrice Rama
This study is based on a randomized control trial (RCT) aimed at understanding the effectiveness of a financial literacy pilot program conducted in 2014-2016 at the Institute for Indian Mother and Child, a non-profit microfinance institution based near Kolkata. Significant impacts are revealed in terms of improvements in saving accumulation and punctuality in the repayment of the loan instalments for borrowers belonging to the treated group, compared to the group of borrowers who did not participated to the program. In particular, positive contribution emerges from the evolution of both the cognitive skills and the level of financial knowledge developed by the beneficiaries during the training program. Estimates provide evidence that enhancing cognitive abilities turn out to be strongly beneficial in fostering the accumulation savings, whereas financial principles also had an (although weaker) impact on stimulating a more timely reimbursement of the instalments. We conclude that the financial literacy pilot program has significantly activated women cognitive abilities, giving them the opportunity to apply them both in the course and in their businesses.
本研究基于一项随机对照试验(RCT),旨在了解2014-2016年在加尔各答附近的非营利性小额信贷机构印度母婴研究所(Institute for india Mother and Child)开展的金融素养试点项目的有效性。与未参加该计划的借款人相比,受治疗组的借款人在储蓄积累和按时偿还分期贷款方面的改善显示了显著的影响。特别是,在培训过程中,受益人的认知技能和金融知识水平的发展产生了积极的贡献。估计提供的证据表明,提高认知能力对促进积累储蓄非常有益,而财务原则对促进更及时偿还分期付款也有(虽然较弱)影响。我们的结论是,金融知识试点项目极大地激活了女性的认知能力,使她们有机会在课程和业务中应用这些认知能力。
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引用次数: 0
Regularized Semiparametric Estimation of High Dimensional Dynamic Conditional Covariance Matrices 高维动态条件协方差矩阵的正则半参数估计
Pub Date : 2019-04-01 DOI: 10.2139/ssrn.3190500
C. Morana
Abstract A three-step estimation strategy for dynamic conditional correlation (DCC) models is proposed. In the first step, conditional variances for individual and aggregate series are estimated by means of QML equation by equation. In the second step, conditional covariances are estimated by means of the polarization identity and conditional correlations are estimated by their usual normalization. In the third step, the two-step conditional covariance and correlation matrices are regularized by means of a new non-linear shrinkage procedure and optimally smoothed. Due to its scant computational burden, the proposed regularized semiparametric DCC model (RSP-DCC) allows to estimate high dimensional conditional covariance and correlation matrices. An application to global minimum variance portfolio is also provided, confirming that RSP-DCC is a simple and viable alternative to existing DCC models.
摘要提出了一种动态条件相关(DCC)模型的三步估计策略。第一步,利用QML方程对单个序列和集合序列的条件方差进行估计。第二步,用极化恒等式估计条件协方差,用它们通常的归一化估计条件相关。在第三步中,通过一种新的非线性收缩过程对两步条件协方差和相关矩阵进行正则化并进行最优平滑。由于计算量小,本文提出的正则化半参数DCC模型(RSP-DCC)可以估计高维条件协方差和相关矩阵。最后给出了在全局最小方差组合中的应用,验证了RSP-DCC模型是一种简单可行的DCC模型替代方案。
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引用次数: 5
Solidarity and Efficiency in Preference Aggregation: A Tale of Two Rules 偏好聚合中的团结与效率:两个规则的故事
Pub Date : 2018-11-15 DOI: 10.2139/ssrn.3285105
Stergios Athanasoglou
This paper is concerned with preference-aggregation rules satisfying desirable efficiency and solidarity requirements. We formulate weaker versions of existing solidarity axioms and show how they imply, in conjunction with strategy-proofness, the existence of reference outcomes holding privileged status. We propose a new class of rules, fixed order status-quo rules, that can be productively contrasted to their closest counterparts in the literature, status-quo rules based on the least upper bound of a lattice. Fixed order status-quo rules satisfy stronger efficiency requirements than lattice status-quo rules but have weaker, though still significant, solidarity properties. A subfamily based on lexicographic orders is analyzed further. Fixed order status-quo rules are characterized by strategy-proofness, strong efficiency, and a third axiom, unanimity-basedness.
本文研究满足理想效率和团结要求的偏好聚合规则。我们制定了现有团结公理的较弱版本,并展示了它们如何暗示,与策略证明性相结合,具有特权地位的参考结果的存在。我们提出了一类新的规则,固定顺序的现状规则,它可以与文献中最接近的对应规则,基于格的最小上界的现状规则进行有效的对比。定序现状规则比点阵现状规则满足更强的效率要求,但具有更弱的团结性,尽管仍然很重要。进一步分析了一个基于字典顺序的亚族。固定秩序的现状规则的特点是无策略性、高效率和第三个公理——基于一致性。
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引用次数: 0
Existence, Multiplicity and Dynamic Complexity in an OLG Model with Fiscal Policy and Debt 考虑财政政策和债务的OLG模型的存在性、多重性和动态复杂性
Pub Date : 2018-07-28 DOI: 10.2139/ssrn.3222152
L. Cerboni Baiardi, A. Naimzada
We consider the overlapping generation model formulated in Dioikitopoulos (2018) that tackles the problem of fiscal policy rules for debt sustainability, allowing for the presence of debt bubbles. The author gives conditions for sustainability achievement in terms of debt and capital control channels, taking into account initial conditions. Our mathematical analysis improves his study and reveals a wider spectrum of possible economic outcomes that might sometimes be opposed to the conclusions to which Dioikitopoulos (2018) comes. In detail, we reconsider the role of fiscal policy prescriptions, implemented by means of debt and capital responsiveness parameters, in determining the existence and multiplicity of stationary states. We also deepen the influence of policy parameters on local stability properties, highlighting the possible occurrence of two bifurcation scenarios and the consequent emergence of periodic and complex dynamics. Moreover, we review the role of fiscal policies in changing the fate of incoming economic scenarios and in preventing non sustainable paths from occurring.
我们考虑了diikitopoulos(2018)提出的重叠代模型,该模型解决了债务可持续性的财政政策规则问题,允许债务泡沫的存在。考虑初始条件,作者从债务和资本控制渠道两方面给出了可持续性实现的条件。我们的数学分析改进了他的研究,揭示了更广泛的可能的经济结果,这些结果有时可能与Dioikitopoulos(2018)得出的结论相反。详细地说,我们重新考虑财政政策处方的作用,通过债务和资本响应参数来实施,在确定稳定状态的存在性和多样性方面。我们还深化了政策参数对局部稳定性特性的影响,强调了两种分岔情景的可能发生以及随之而来的周期性和复杂动力学的出现。此外,我们回顾了财政政策在改变未来经济情景的命运和防止不可持续路径发生方面的作用。
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引用次数: 0
Political Regimes and the Determinants of Terrorism and Counter-Terrorism 政治制度与恐怖主义和反恐的决定因素
Pub Date : 2018-07-16 DOI: 10.2139/ssrn.3214601
Nicola Brugali, P. Buonanno, M. Gilli
Why do some democratic governments react weakly to terrorism, while apparently similar regimes react harshly? More generally, what are the determinants of governments' reaction to terrorism? And, what are the determinants of terrorism and of its dynamic? In this paper we focus on domestic terrorism and counter-terrorism as affected by economic development, political heterogeneity, citizens' human capital, and government accountability and responsiveness. The empirical research has not reached a consensus on the socioeconomic determinants of terrorism. A possible explanation is that observable data may depend on hidden causal links that are not simply caught by standard regressions. In this paper we argue that terrorism activities are endogenous to the governments' counter-terrorism choices, which in turn does depend on political and socioeconomic factors. Our basic point is that both causes and consequences of terror can only be understood in terms of strategic interaction among political actors, primarily government and citizens. We propose a model that considers human capital, economic development, political heterogeneity, government responsiveness and accountability as possible factors influencing terrorism and the government's response. We show that the game has three possible equilibrium outcomes, uniquely determined by our parameters: a Strong Regime characterized by no terrorism, high counter-terrorism and increasing protests, a Flexible Regime characterized by low terrorism which increase or decrease according to the random reaction of the government, and a Permissive Regime characterized by terrorism activity, no counter-terrorism and no protests. We also show that it is possible for a democratic regime to repress harshly and for an autocratic polity to be permissive.
为什么一些民主政府对恐怖主义反应软弱,而显然类似的政权却反应严厉?更一般地说,是什么决定了政府对恐怖主义的反应?恐怖主义及其动态的决定因素是什么?在本文中,我们将重点关注受经济发展、政治异质性、公民人力资本以及政府问责和响应能力影响的国内恐怖主义和反恐。实证研究尚未就恐怖主义的社会经济决定因素达成共识。一种可能的解释是,可观察到的数据可能依赖于隐藏的因果关系,而这些因果关系不是简单地由标准回归捕捉到的。在本文中,我们认为恐怖主义活动是政府反恐选择的内生因素,而政府的反恐选择又取决于政治和社会经济因素。我们的基本观点是,恐怖的起因和后果只能从政治行为者(主要是政府和公民)之间的战略互动来理解。我们提出了一个模型,将人力资本、经济发展、政治异质性、政府反应和问责制作为影响恐怖主义和政府反应的可能因素。我们表明,游戏有三种可能的均衡结果,由我们的参数唯一决定:一个强大的政权,其特征是没有恐怖主义,高度反恐和不断增加的抗议;一个灵活的政权,其特征是低恐怖主义,根据政府的随机反应增加或减少;一个宽容的政权,其特征是恐怖主义活动,没有反恐和没有抗议。我们还表明,一个民主政权有可能进行严厉的镇压,而一个专制政体有可能是宽容的。
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引用次数: 0
期刊
University of Milan Bicocca Department of Economics
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