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Still Crazy after All These Years: The Returns on Carry Trade 多年后依然疯狂:套息交易的回报
Pub Date : 2016-02-07 DOI: 10.2139/ssrn.2728990
E. Colombo, Gianfranco Forte, Roberto Rossignoli
This paper proposes a novel approach to provide directional forecasts for carry trade strategies; this approach is based on Support VectorMachines (SVM), a learning algorithm which delivers extremely promising results. Building on recent findings of the literature on carry trade we condition the SVM on indicators of uncertainty and risk; we show that this provides a dramatic improvement of the performance of the strategy, in particular during periods of financial distress such as the recent financial crises. Disentangling between measures of risk we show that the best performances are obtained by conditioning the SVM on measures of liquidity risk rather than on market volatility.
本文提出了一种为套息交易策略提供方向性预测的新方法;该方法基于支持向量机(SVM),这是一种学习算法,可以提供非常有希望的结果。基于最近关于套利交易的文献发现,我们将支持向量机条件化为不确定性和风险指标;我们表明,这为该战略的绩效提供了显着改善,特别是在财务困境期间,如最近的金融危机。通过对风险度量的分离,我们发现通过将支持向量机调节为流动性风险度量而不是市场波动度量来获得最佳性能。
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引用次数: 0
A Cobweb Model with Alternating Demand and Supply Functions 需求和供给函数交替的蛛网模型
Pub Date : 2016-02-07 DOI: 10.2139/ssrn.2728986
F. Cavalli
In this work I present a cobweb model for markets characterized by two couples of demand and supply functions which cyclically alternate with period two, in a succession of peak and off-peak market phases. Starting from classical adaptive expectations, a new expectation formation mechanism is presented, to take into account such markets’ peculiarity. In particular, to adapt the previous in-phase expected price, agents use both in-phase and out-of-phase expectation errors, suitably weighted through a phase weight. It is shown that the resulting model is described by a non-autonomous difference equation. The local asymptotic stability of the steady state equilibrium is studied, showing that it depends on the expectation weight, the phase weight and on both the relative slopes, at the equilibrium, of the supply functions with respect to the demand functions. Several crucial differences with respect to the classical cobweb model are highlighted, showing the potentially ambiguous role of expectation weight and of relative slopes. It is shown that destabilization can occur both through a flip and a Neimark-Sacker bifurcation, which can occur for the same market conditions and different expectation weights.
在这项工作中,我提出了一个以两对需求和供给函数为特征的市场蛛网模型,这两对需求和供给函数在连续的高峰和非高峰市场阶段周期性地与第二阶段交替。从经典的适应性预期出发,提出了一种考虑市场€™特性的新的预期形成机制。特别是,为了适应先前的同期期望价格,代理使用同期和非同期期望误差,并通过相位权重适当地加权。结果表明,所得模型用非自治差分方程来描述。研究了稳态平衡的局部渐近稳定性,表明稳态平衡的局部渐近稳定性取决于期望权值、相位权值以及供给函数相对于需求函数在平衡点处的相对斜率。强调了与经典蛛网模型的几个关键区别,显示了期望权重和相对斜率的潜在模糊作用。结果表明,对于相同的市场条件和不同的期望权重,不稳定可以通过翻转和neimmark - sacker分岔发生。
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引用次数: 0
In Search of the Euro Area Fiscal Stance 寻找欧元区的财政立场
Pub Date : 2016-01-29 DOI: 10.2139/ssrn.2724453
Alice Albonico, Alessia Paccagnini, P. Tirelli
This paper investigates the role of fiscal policies over the aggregate EMU business cycle. Previous studies, based on the assumption of non-separability between public and private consumptions, obtain a large public consumption multiplier, a small fraction of non-Ricardian households and, consequently, a relatively small multiplier for public transfers. We provide motivations for assuming separability and, on these grounds, we estimate a relatively large share of non-Ricardian households. As a result, we obtain that both multipliers are large. We also find that, in spite of their potentially strong effects, fiscal policies were substantially muted during the EMU years. This result is confirmed even for the post 2007 period. In fact fiscal policies did not complement the monetary policy stimulus in response to the financial crisis. Further, we cannot detect any substantial aggregate effect of austerity measures. Finally, the post-2007 surge in expenditure-to-GDP ratios was apparently determined by non-policy shocks that reduced output growth.
本文研究了财政政策对经济周期的影响。先前的研究基于公共消费和私人消费不可分割的假设,得出了一个很大的公共消费乘数,一小部分非李嘉图家庭,因此,公共转移的乘数相对较小。我们提供了假设可分离性的动机,并基于这些理由,我们估计了相对较大比例的非李嘉图家庭。结果,我们得到两个乘数都很大。我们还发现,尽管财政政策具有潜在的强大影响,但在欧洲货币联盟时期,财政政策基本上是温和的。这一结果甚至在2007年以后的时期也得到证实。事实上,在应对金融危机时,财政政策并没有补充货币政策刺激。此外,我们无法发现紧缩措施的任何实质性总体效应。最后,2007年后支出与gdp之比的飙升显然是由降低产出增长的非政策冲击决定的。
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引用次数: 30
The Cost of Default: Private vs. Official Sovereign Debt Restructurings 违约成本:私人与官方主权债务重组
Pub Date : 2015-12-26 DOI: 10.2139/ssrn.2708440
S. Marchesi
This paper studies the relationship between sovereign debt default and (short term) GDP growth taking into account the depth of a debt restructuring and distinguishing between commercial and official sovereign debt restructurings. Analyzing default episodes in 117 countries over the period 1975-2013, I find that, in the short term, defaults are correlated with significant contraction of output growth. Moreover, by controlling for both the occurrence and the magnitude of private and official defaults, I am able to detect a more lasting and negative link between default and growth (which eventually turns out to be positive but only for haircuts). In both cases I find evidence of a trade-off concerning the restructuring's size. Higher haircuts, however, may have some benefits in the short-run, but in turn imply a negative stigma which lower growth over a longer period. Conversely, higher amount of official restructuring may have some costs in the short-run, but are associated to an increase in growth in the long run. Adopting an alternative specification, in which the dependent variable is a country's credit rating, I investigate whether variation in the borrowing costs (highly correlated with credit ratings) may be one of the channels behind the link between restructuring and growth. I find that, in the case of haircuts, an improvement in the borrowing conditions a few years after the restructuring may explain a growth recovery. For official restructurings the evidence is more mixed.
本文研究了主权债务违约与(短期)GDP增长之间的关系,同时考虑了债务重组的深度,并区分了商业主权债务重组和官方主权债务重组。通过分析1975年至2013年117个国家的违约事件,我发现,在短期内,违约与产出增长的显著收缩相关。此外,通过控制私人和官方违约的发生和规模,我能够发现违约与增长之间更持久、更消极的联系(最终证明这是积极的,但仅适用于“理发”)。在这两种情况下,我都发现了重组规模方面存在权衡的证据。然而,更高的削发率可能在短期内有一些好处,但反过来意味着一种负面的耻辱,这种耻辱会降低长期的增长。相反,较高的官方结构调整在短期内可能有一些成本,但在长期内与增长的增加有关。采用另一种规范,其中因变量是一个国家的信用评级,我研究借款成本的变化(与信用评级高度相关)是否可能是重组与增长之间联系背后的渠道之一。我发现,就减记而言,重组几年后借款条件的改善或许可以解释增长复苏的原因。官方重组的证据则更为复杂。
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引用次数: 3
Semiparametric Estimation of Multivariate GARCH Models 多元GARCH模型的半参数估计
Pub Date : 2015-12-10 DOI: 10.2139/ssrn.2701700
C. Morana
The paper introduces a new simple semiparametric estimator of the conditional variance covariance and correlation matrix (SP-DCC). While sharing a similar sequential approach to existing dynamic conditional correlation (DCC) methods, SP-DCC has the advantage of not requiring the direct parameterization of the conditional covariance or correlation processes, therefore also avoiding any assumption on their long-run target. In the proposed framework, conditional variances are estimated by univariate GARCH models, for actual and suitably transformed series, in the first step; the latter are then nonlinearly combined in the second step, according to basic properties of the covariance and correlation operator, to yield nonparametric estimates of the various conditional covariances and correlations. Moreover, in contrast to available DCC methods, SP-DCC allows for straightforward estimation also for the non-symultaneous case, i.e., for the estimation of conditional cross-covariances and correlations, displaced at any time horizon of interest. A simple ex-post procedure, to ensure well behaved conditional covariance and correlation matrices, grounded on nonlinear shrinkage, is finally proposed. Due to its sequential implementation and scant computational burden, SP-DCC is very simple to apply and suitable for the modeling of vast sets of conditionally heteroskedastic time series.
介绍了一种新的条件方差、协方差和相关矩阵的简单半参数估计。虽然与现有的动态条件相关(DCC)方法共享类似的顺序方法,但SP-DCC的优点是不需要对条件协方差或相关过程进行直接参数化,因此也避免了对其长期目标的任何假设。在该框架中,第一步采用单变量GARCH模型对实际和适当变换的序列进行条件方差估计;然后在第二步中,根据协方差和相关算子的基本性质,将后者非线性组合,以产生各种条件协方差和相关性的非参数估计。此外,与可用的DCC方法相比,SP-DCC还允许对非同步情况进行直接估计,即对条件交叉协方差和相关性的估计,在任何感兴趣的时间范围内进行迁移。一个简单的事后处理,以确保良好的表现条件协方差和相关矩阵,基于非线性收缩,最后提出。SP-DCC算法具有顺序实现和计算量小的特点,应用简单,适用于大量条件异方差时间序列的建模。
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引用次数: 12
Communication and Performance in Bank-Fund Joint Participation 银资联合参与的沟通与绩效
Pub Date : 2015-11-26 DOI: 10.2139/ssrn.2708456
S. Marchesi
In this paper I relate Bank-Funds performance to their willingness (or ability) to communicate. I find evidence that a Bank-Fund simultaneous loan is associated to an increase in economic growth and that such effect is diminished by factors preventing full communication, such as the degree of Bank-Fund competition and the salience of asymmetric information. Politically motivated loans seem - at least to some extent - stimulate more IMF-WB interaction which turns out to be associated to higher economic growth.
在本文中,我将银行-基金的绩效与其沟通意愿(或能力)联系起来。我发现有证据表明,银行-基金同步贷款与经济增长的增长有关,而这种影响因阻碍充分沟通的因素而减弱,例如银行-基金竞争的程度和信息不对称的突出性。出于政治动机的贷款似乎——至少在某种程度上——刺激了国际货币基金组织与世界银行之间更多的互动,而这种互动最终被证明与更高的经济增长有关。
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引用次数: 0
Trend e stagionalità delle presenze turistiche russe in Italia (Trends and Seasonality in the Case of Russian Tourism in Italy) 俄罗斯旅游在意大利的趋势和季节性
Pub Date : 2015-11-16 DOI: 10.2139/SSRN.2691501
Giovanni Tonini
Italian Abstract: Il turismo russo in Italia sta assumendo un peso, anche in termini economici, sempre piu rilevante che, al di la di eventi sfavorevoli contingenti, tendera a consolidarsi e a svilupparsi anche nel futuro. Tuttavia, nonostante l'importanza di questo segmento turistico, mancano studi sistematici che ne analizzino, con opportuni modelli statistici, le componenti temporali di breve e medio-lungo periodo. Il presente contributo intende colmare tale lacuna sviluppando un'analisi del trend e della stagionalita delle presenze turistiche russe in Italia dal gennaio 2001 al dicembre 2012. Tale analisi sara condotta con due approcci diversi, il primo dei quali fa ricorso a un metodo di scomposizione fondato su opportune medie mobili, mentre il secondo si basa su modelli dinamici di regressione multipla. Cosi facendo sara possibile cogliere il fenomeno da piu punti di vista e procedere poi ad un confronto sistematico dei risultati ottenuti. Tali approcci saranno applicati non solo all'insieme delle presenze russe in Italia, ma anche a suoi opportuni sottoinsiemi, distinti per settore ricettivo (alberghiero e complementare) e per intervallo temporale (2001-2006 e 2007-2012); in questo modo, mediante opportuni confronti intersettoriali e intertemporali, si potranno evidenziare meglio le caratteristiche dei flussi turistici russi che interessano l'Italia. Queste caratteristiche saranno poi ulteriormente approfondite ponendole a confronto con quelle sia delle presenze turistiche di altre nazionalita (tedesca e italiana), sia delle presenze straniere totali. English Abstract: In economic terms and otherwise, Russian tourism in Italy is becoming increasingly important; despite various historically contingent and adverse events, it will tend to consolidate and develop further in the future. However, despite the importance of this tourism segment, systematic studies that analyse, with appropriate statistical models, its short- and long-term temporal components are missing. This paper aims to fill this gap by developing a trend and seasonality analysis of Russian overnight stays in Italy from January 2001 to December 2012. Two different approaches will be followed: the first will use a decomposition method based on appropriate moving averages, while the second will be based on dynamic multiple regression models. This approach will enable the study to examine the phenomenon from different perspectives and then to proceed to a systematic comparison of the results obtained. These approaches will be applied not only to the total number of Russian tourists coming to Italy but also to its appropriate subsets, distinguished by hospitality sector (hotels and other tourist accommodations) and time interval (2001-2006 and 2007-2012). In this way, through appropriate intersectoral and intertemporal comparisons, the characteristics of Russian tourist flows to Italy can be better highlighted. These characteristics will be further analysed, comparing them with th
意大利摘要:俄罗斯在意大利的旅游业正变得越来越重要,甚至在经济方面也越来越重要,除了不利的事件之外,它还将在未来巩固和发展。然而,尽管这一旅游部门很重要,但缺乏系统的研究来分析短期和中期和长期的时间组成部分,并提供适当的统计模型。本贡献旨在通过分析2001年1月至2012年12月期间俄罗斯在意大利旅游的趋势和季节来填补这一空白。这种分析将采用两种不同的方法进行,一种是使用基于适当移动平均值的分解方法,另一种是基于动态多元回归模型。这将使我们能够从几个角度来看待这一现象,并对所取得的结果进行系统的比较。这些方法不仅适用于所有俄罗斯人在意大利的存在,而且也适用于适当的子集,按住宿部门(住宿和补充)和时间间隔(2001-2006年和2007-2012年)划分;因此,通过适当的部门间和跨时间比较,可以更好地突出影响意大利的俄罗斯游客流动的特点。然后将这些特征与其他国家(德国和意大利)的游客人数以及外国游客总数进行比较。英语摘要:在经济术语和otherwise中,意大利的俄罗斯旅游变得越来越重要;它将在未来得到巩固和发展。请说明这一旅游部分的重要性,该分析的系统研究,适当的统计模型,其短时间和长期的成分缺失。从2001年1月到2012年12月,这篇论文旨在填补意大利俄罗斯隔夜分析的趋势和季节性差距。将遵循两种不同的方法:第一种方法将使用基于不合适的移动平均线的解合成法,而第二种方法将基于多个动态回归模型。这一方法将使研究能够从不同的观点出发,然后对结果进行系统的比较。这些方法不仅适用于进入意大利的俄罗斯游客的总数,而且也适用于其适当的subsets,通过酒店和其他游客的联系和时间间隔(2001-2006年和2007-2012年)来区分。在这种情况下,通过适当的跨部门和跨时间比较,俄罗斯游客流向意大利的characteristics可以得到更好的改善。这些特性将进一步分析,并与其他国家旅游者的隔夜地位进行比较。
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引用次数: 1
Model Averaging by Stacking 模型叠加平均法
Pub Date : 2015-09-25 DOI: 10.2139/ssrn.2665704
C. Morana
The paper introduces a new Frequentist model averaging estimation procedure, based on a stacked OLS estimator across models, implementable on cross-sectional, panel, as well as time series data. The proposed estimator shows the same optimal properties of the OLS estimator under the usual set of assumptions concerning the population regression model. Relatively to available alternative approaches, it has the advantage of performing model averaging exante in a single step, optimally selecting models’ weight according to the MSE metric, i.e. by minimizing the squared Euclidean distance between actual and predicted value vectors. Moreover, it is straightforward to implement, only requiring the estimation of a single OLS augmented regression. By exploiting exante a broader information set and benefiting of more degrees of freedom, the proposed approach yields more accurate and (relatively) more efficient estimation than available expost methods.
本文介绍了一种新的Frequentist模型平均估计方法,该方法基于跨模型的堆叠OLS估计器,可在横截面、面板和时间序列数据上实现。在关于总体回归模型的通常假设集下,所提出的估计量显示出与OLS估计量相同的最优性质。相对于现有的替代方法,它的优点是在一个步骤中执行模型平均扩展,根据MSE度量最优地选择模型的权重,即通过最小化实际值向量和预测值向量之间的平方欧几里德距离。此外,它很容易实现,只需要估计单个OLS增广回归。通过利用更广泛的信息集并受益于更多的自由度,所提出的方法比现有的导出方法产生更准确和(相对)更有效的估计。
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引用次数: 7
Can a DSGE Model Explain a Costly Disinflation? DSGE模型能解释代价高昂的反通胀吗?
Pub Date : 2015-07-01 DOI: 10.2139/ssrn.2640114
M. Ferrara, P. Tirelli
This paper shows that a medium-scale DSGE model is able to explain a contemporaneous reduction of output and consumption during a disinflation policy, as it is in the empirical evidence. To this aim, we introduce Rotemberg (1982) adjustment costs and the limited asset market participation assumption.
本文表明,中等规模的DSGE模型能够解释在反通货膨胀政策期间产出和消费的同时减少,正如经验证据所证明的那样。为此,我们引入Rotemberg(1982)的调整成本和有限资产市场参与假设。
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引用次数: 0
Longevity's Factors in Small-Scale Business System: An Italian Case Study During the 20th Century 小企业制度的长寿因素:一个20世纪意大利的案例研究
Pub Date : 2015-04-15 DOI: 10.2139/SSRN.2594640
I. Suffia
Firms’ survival and longevity have recently emerged as a new intriguing theme of business history, spreading from the initial studies on family business to all forms of business. In family business the transition to the next generation can represent a strong limit to survival, as it depends on three different longevity factors: the family members’ involvement and commitment, the preparation of an adequate succession planning and the presence of a competitive advantage. Temporal continuity has become an independent topic involving all types of business, with respect to size, ownership and sectorial diversity. The goal of the analysis was to identify the determinants of longevity. The present research moves along this second line of investigation, focusing on small-scale businesses and taking into consideration a case study. The small and medium-scale (SME) system examined is that of Sesto San Giovanni, one of the most important Italian Company-town during the 20th century, considered the ‘industrial district’ of Milan. The study first verifies the evolution of the local SMEs system, highlighting its development during the century. Having defined the context, the attention shifts to the temporal survival of local businesses and its determinants. Finally, the research includes the history of several enterprise experiences to illustrate the analysis’ results.
企业的生存和长寿最近成为商业史上一个有趣的新主题,从最初对家族企业的研究扩展到所有形式的企业。在家族企业中,向下一代的过渡可能会对企业的生存造成很大的限制,因为它取决于三个不同的长寿因素:家族成员的参与和承诺、制定适当的继任计划以及竞争优势的存在。时间连续性已经成为一个独立的话题,涉及所有类型的业务,涉及规模、所有权和部门多样性。分析的目的是确定长寿的决定因素。目前的研究沿着这第二条调查路线进行,重点是小型企业,并考虑到一个案例研究。中小规模(SME)系统是Sesto San Giovanni的系统,Sesto San Giovanni是20世纪意大利最重要的公司城镇之一,被认为是米兰的“工业区”。本研究首先验证了地方中小企业制度的演变,突出了其百年发展历程。在定义了上下文之后,注意力转移到当地企业的暂时生存及其决定因素上。最后,本研究包含了几家企业的历史经验来说明分析的结果。
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引用次数: 2
期刊
University of Milan Bicocca Department of Economics
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