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Multivariate Spatial IV Regression 多元空间IV回归
Pub Date : 2019-01-04 DOI: 10.12660/BRE.V38N22018.74235
Marcus L. Nascimento, C. A. Abanto-Valle, Mario Jorge Cardoso Mendonca
In this paper, a Multivariate Spatial Regression model with Endogenous Variables 
is proposed. In order to deal with endogeneity and spatial dependence, 
the instrumental variables (IV) methodology and an autoregressive spatial structure, 
frequently used in econometric applications, are implemented. A Bayesian inference 
procedure based on simulation schemes designed to obtain samples from the 
posterior distribution of model parameters is developed. Finally, the methodology 
is illustrated through an application to the impact of broadband access on the 
economic sectors. 
本文提出了一个具有内生变量的多元空间回归模型。为了处理内生性和空间依赖性,实施了计量经济学应用中经常使用的工具变量(IV)方法和自回归空间结构。开发了一种基于仿真方案的贝叶斯推理程序,从模型参数的后验分布中获取样本。最后,通过应用宽带接入对经济部门的影响来说明该方法。
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引用次数: 2
Correcting the population of Brazilian municipalities using the Jackknife 使用Jackknife修正巴西城市的人口
Pub Date : 2018-05-25 DOI: 10.12660/BRE.V38N12018.56157
Enlinson Mattos, Pedro Santos
Este trabalho propoe um metodo para identificar e corrigir a distorcao observada na distribuicao de populacao dos municipios brasileiros presente nos dados de Censo Demografico (Monasterio, 2014). Essa distorcao se caracteriza por uma concentracao elevada de municipios com valores de populacao proximos das faixas usadas como criterio de distribuicao de fundos para os municipios do Brasil (Fundo de Participacao de Municipios, FPM). O metodo proposto utiliza dois passos. Primeiro, busca identificar os municipios candidatos a ajuste, atraves de um metodo Jackknife , e segundo, sugere uma correcao para sua populacao de acordo com um modelo linear que segue a Lei de Zipf de distribuicao de populacao de cidades (ZIPF, 1949). Apos a deteccao e correcao da populacao daqueles municipios, apresentamos o teste de McCrary (2007) o qual nao aponta mais descontinuidades significativas na distribuicao da populacao dos municipios para os anos de 2000, 2007 e 2010 sugerindo o sucesso do procedimento. Mais importante, nao e encontrada alteracao significativa na distribuicao do FPM apos esta correcao.
这项工作提出了一种方法来识别和纠正在人口普查数据中观察到的巴西城市人口分布的扭曲(Monasterio, 2014)。这种扭曲的特点是高度集中的市政当局,其人口值接近作为巴西市政当局资金分配标准的范围(市政参与基金,FPM)。提出的方法有两个步骤。首先,它试图通过折刀方法确定候选城市进行调整,其次,根据遵循城市人口分布Zipf定律(Zipf, 1949)的线性模型提出其人口的修正。在对这些城市的人口进行检测和校正后,我们提出了McCrary检验(2007),该检验没有显示2000年、2007年和2010年城市人口分布的显著不连续,表明该程序是成功的。更重要的是,修正后的FPM分布没有发现显著变化。
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引用次数: 1
Can Switching Costs Reduce Prices 转换成本能降低价格吗
Pub Date : 2018-05-25 DOI: 10.12660/BRE.V38N12018.65890
R. Castilho
The existence of switching costs for consumers may aect prices.While rms have an incentive to increase prices and exploit its currentconsumers, they also might reduce prices to increase the number ofconsumers next period. This paper presents a model of consumer andpricing behavior with switching costs to investigate how prices vary withdierent switching costs levels. I also present a method to estimatemodel's parameters. Results show that prices do not monotonicallyincrease with switching costs. Market shares and prots increase forsmall switching cost values and decrease for larger ones.
消费者转换成本的存在可能会影响价格。虽然rms有提高价格和剥削现有消费者的动机,但他们也可能降低价格以增加下一时期的消费者数量。本文建立了考虑转换成本的消费者和定价行为模型,探讨了不同转换成本水平下价格的变化规律。本文还提出了一种估计模型参数的方法。结果表明,价格并非随着转换成本的增加而单调增加。较小的转换成本值会增加市场份额和利润,而较大的转换成本值会减少市场份额和利润。
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引用次数: 0
Predictability of Aggregate Consumption in Brazil: habits, Non-Separability between Consumption and Leisure, or Credit Constraint? 巴西总消费的可预测性:习惯、消费与休闲之间的不可分离性,还是信贷约束?
Pub Date : 2018-05-25 DOI: 10.12660/bre.v38n12018.59824
Fernando Antônio de Barros Júnior, Bruno R. Delalibera, Valdemar Pinho Neto
O objetivo deste trabalho e estudar o consumo agregado no Brasil. Realizamos um teste que permite identificar se o processo de consumo apresenta formacao de habitos, nao separabilidade entre consumo e lazer ou se existe um grupo de consumidores com restricao ao credito. Em nosso exercicio empirico encontramos evidencias de que os consumidores sao restritos e rejeitamos as hipoteses de formacao de habitos e nao separabilidade. Desse modo, a renda disponivel e um fator importante na determinacao do consumo agregado. Alem disso, fazemos testes que nos permitem realizar inferencia robusta mesmo na presenca de instrumentos fracos.
这项工作的目的是研究巴西的总消费。我们进行了一个测试,以确定消费过程是否表现出习惯的形成,消费和休闲之间的不可分离性,或者是否存在一个受信贷限制的消费者群体。在我们的实证练习中,我们发现了消费者受到限制的证据,我们拒绝了习惯形成和不可分离的假设。因此,可支配收入是决定总消费的重要因素。此外,我们做的测试使我们能够在弱仪器存在的情况下进行稳健的推断。
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引用次数: 2
Monetary Policy and Exchange Rate: Effects on Disaggregated Prices in a FAVAR Model for Brazil 货币政策与汇率:巴西FAVAR模型对分类价格的影响
Pub Date : 2018-05-25 DOI: 10.12660/BRE.V38N12018.43674
E. Lima, Thiago Sevilhano Martinez, V. S. Cerqueira
This paper investigates the effects of monetary and exchange rate shocks on disaggregated prices of the Brazilian Consumer Price Index (IPCA), from 1999 to 2011, using a factor-augmented vector autoregressive model (FAVAR). We estimate the model with Bayesian techniques, and construct impulse-response functions using sign restrictions over the responses of macroeconomic variables. The main results are: a) taking into account the weights, 50% of the rates of price change at the sub-items level fell after a monetary shock and 40% rose after exchange rate's shock; b) only 0.3% of the sub-items showed price puzzle for monetary shocks and 4.7% for exchange rate shocks; c) macroeconomic shocks are more persistent than series-specific shocks; d) for the sub-itens, series-specific shocks are the main determinants of the variance, but macro shocks are more influent over aggregated series e) the answers are different according to the sector considered.
本文采用因子增强向量自回归模型(FAVAR)研究了1999年至2011年货币和汇率冲击对巴西消费者价格指数(IPCA)分类价格的影响。我们使用贝叶斯技术估计模型,并使用宏观经济变量响应的符号限制构造脉冲响应函数。主要结果是:a)考虑权重,分项物价变动率在货币冲击后下降了50%,在汇率冲击后上升了40%;B)只有0.3%的分项显示货币冲击的价格难题,4.7%的分项显示汇率冲击的价格难题;C)宏观经济冲击比特定系列的冲击更持久;D)对于分项,特定系列的冲击是方差的主要决定因素,但宏观冲击对汇总系列的影响更大。e)根据所考虑的部门,答案不同。
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引用次数: 1
Expectations about Monetary Policy and the Behaviour of the Central Bank 对货币政策和央行行为的预期
Pub Date : 2017-11-28 DOI: 10.12660/BRE.V37N22017.55248
Bernardo Dutra
Using microdata from the IBRE-FGV Consumer Survey we investigate if Brazilian consumers form expectations consistent with the Taylor rule and if the consistency changes according to the monetary policy conducted by the Central Bank of Brazil. We find that the public can properly understand the relationship between interest rates and inflation in the rule framework, but not the relationship between interest rates and unemployment, probably due to the single mandate adopted in Brazil and some features of the data. The partial effects methodology introduced by Carvalho and Nechio (2014) confirm these results. Furthermore, we also find that the consistency of expectations significantly drops during periods that the central bank deviates from the Taylor rule, indicating that a higher tolerance to inflationary shocks can damage the coordination of society’s expectations.
利用IBRE-FGV消费者调查的微观数据,我们调查了巴西消费者是否形成了与泰勒规则一致的预期,以及这种一致性是否会根据巴西中央银行实施的货币政策而变化。我们发现公众可以很好地理解规则框架下的利率与通胀之间的关系,但却不能理解利率与失业率之间的关系,这可能是由于巴西采用的单一任务以及数据的一些特点。Carvalho和Nechio(2014)引入的部分效应方法证实了这些结果。此外,我们还发现,在央行偏离泰勒规则期间,预期的一致性显著下降,这表明对通胀冲击的更高容忍度会损害社会预期的协调。
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引用次数: 0
Misallocation in the Brazilian Manufacturing Sector 巴西制造业的配置不当
Pub Date : 2017-11-28 DOI: 10.12660/BRE.V37N22017.61801
R. Vasconcelos
This work investigates the existence of resource misallocation in the Brazilian manufacturing sector and measures possible distortions in it. Using a similar method of measurement to the one developed by Hsieh and Klenow (2009) and firm-level data for 1996-2011 we find evidence of misallocation in the manufacturing sector during the observed period. Moreover, our results show that misallocation has been growing since 2005. We find that the Brazilian manufacturing sector operates at about 50% of its efficient product. We also find that the economic crisis did not have a substantial effect on the total productivity factor or on the sector's misallocation. However, small firms in particular seem to be strongly affected in a global crisis. Furthermore, the effects described would be attenuated if we consider network effects. Despite Brazil's well-known high tax burden, there is not evidence that this is the main source of resource misallocation.
这项工作调查了巴西制造业资源分配不当的存在,并衡量了其中可能存在的扭曲。使用与Hsieh和Klenow(2009)开发的测量方法相似的方法和1996-2011年的企业层面数据,我们发现了在观察期间制造业分配不当的证据。此外,我们的研究结果表明,自2005年以来,不当配置一直在增长。我们发现,巴西制造业的高效产品利用率约为50%。我们还发现,经济危机对总生产率要素或该部门的错配没有实质性影响。然而,在全球危机中,小企业似乎尤其受到严重影响。此外,如果我们考虑网络效应,所描述的影响将会减弱。尽管巴西的高税负是众所周知的,但没有证据表明这是资源分配不当的主要原因。
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引用次数: 6
Economies of Scale and Scope in the Sanitation Sector 卫生部门的规模经济和范围经济
Pub Date : 2017-11-28 DOI: 10.12660/BRE.V37N22017.47626
C. Lucinda, Francisco Anuatti
A recente crise de abastecimento em Sao Paulo mostrou a importância da regulacao no setor de saneamento no Estado de Sao Paulo. Neste sentido, o presente artigo busca auxiliar o desenho de regulacao no sentido de verificar a existencia de economias de escala e de escopo no setor de saneamento em Sao Paulo. Para tanto, foi construida uma base de dados a partir de dados internos da SABESP, combinados com dados operacionais extraidos do SNIS. Com esta base de dados foi utilizada a metodologia de Evans e Heckman, para a avaliacao de economias de escala e de escopo. Os resultados nos permitem concluir que a existencia de deseconomias de escala e algo extremamente raro nas cidades atendidas pela SABESP, sendo que quase todas apresentam valores negativos para a estatistica SC -- o que indica que o custo de producao dos servicos de agua e esgoto, nos niveis observados, e mais economicamente oferecido no âmbito de uma empresa do que em duas empresas separadas. No entanto, as evidencias sao mais fracas com relacao as economias de escopo. Mas mesmo assim, na grande maioria das cidades atendidas pela SABESP, e mais barato o fornecimento dos servicos de agua e esgoto conjuntamente dentro de uma empresa do que a separacao em duas empresas focadas em diferentes servicos.Tendo em vista os resultados, podemos concluir que iniciativas que visem a separacao estrutural de operadoras de agua integradas tendem a gerar ineficiencias do lado produtivo, fazendo com que o fornecimento dos servicos seja menos economico.
Sao Paulo最近的供应危机表明了监管在Sao Paulo州卫生部门的重要性。在这个意义上,本文试图帮助监管设计,以验证Sao保罗的卫生部门存在规模经济和范围经济。为此,我们建立了一个基于SABESP内部数据的数据库,并结合从SNIS提取的操作数据。利用这个数据库,我们使用Evans和Heckman的方法来评估规模经济和范围经济。使我们得出结果的存在范围的管理不当,极其罕见的城市遭遇的不善,几乎所有的SC - - -到统计服务的生产成本,这表明水和污水,我们观察到,而经济水平在一个公司的两个独立的公司。然而,关于范围经济的证据较弱。但即便如此,在SABESP服务的绝大多数城市,在一家公司内共同提供水和污水服务比分成两家专注于不同服务的公司更便宜。考虑到这些结果,我们可以得出结论,旨在将综合供水运营商的结构分离的举措往往会导致生产方面的效率低下,导致服务的提供不那么经济。
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引用次数: 2
Functional Autoregressive Models: An Application to Brazilian Hourly Electricity Load 功能自回归模型:在巴西小时电力负荷中的应用
Pub Date : 2017-11-28 DOI: 10.12660/BRE.V37N22017.62293
Lucélia Viviane Vaz, G. B. D. S. Filho
The features of the electrical demand and its response to climate variables impose three main features to the load curves: (1) strong inertia, (2) Each observation is a function and (3) cyclical movements. Based on that, we present a generalization of periodic autoregressive models for functional data with functional covariates. We also estimate a functional autoregressive model, where the periodicity of the parameters is induced by harmonic acceleration operators. Using this method, we handle annual load curves, while the first takes into account the daily load curves. We use splines to represent the smooth functions underlying the points. The estimators of the parameters embody the smoothness restrictions enforced on load curves. We compare the Root Mean Squared Error (RMSE) of our models with the RMSE of a benchmark model. We apply this framework to a dataset from the Southeast/Midwest Brazilian Interconnected Power System, from 2003/01/01 to 2011/01/20.
电力需求的特征及其对气候变量的响应使负荷曲线具有三个主要特征:(1)强惯性;(2)每次观测都是一个函数;(3)周期性运动。在此基础上,我们提出了具有函数协变量的函数数据的周期自回归模型的推广。我们还估计了一个函数自回归模型,其中参数的周期性是由谐波加速算子引起的。使用这种方法,我们处理年负荷曲线,而第一个考虑日负荷曲线。我们用样条来表示点下面的光滑函数。参数的估计量体现了对负荷曲线的平滑性约束。我们将模型的均方根误差(RMSE)与基准模型的RMSE进行比较。我们将此框架应用于2003年1月1日至2011年1月1日期间巴西东南部/中西部互联电力系统的数据集。
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引用次数: 1
Disagreement in Inflation Forecasts and Inflation Risk Premia in Brazil 巴西通胀预测与通胀风险溢价的分歧
Pub Date : 2017-05-25 DOI: 10.12660/bre.v37n12017.57700
Jonas Takayuki Doi, Marcelo Fernandes, Clemens Nunes
The aim of this study is to investigate the link between the inflation uncertainty and the inflation risk premia implied by the term structures of nominal and real interest rates in Brazil. We gauge the latter by the difference between the breakeven inflation rate and agents’ inflation median expectations in the Focus Survey published by the Central Bank of Brazil. To proxy for inflation uncertainty, we employ the standard deviation of the 12-month inflation expectations in the Focus Survey. We first estimate the impact of inflation uncertainty on the inflation risk premia across different horizons using a VAR approach. We find that shocks in inflation uncertainty significantly affect the 9-, 12-, 24- and 36-month inflation risk premia. The impact is positive, increasing with maturity at least up to 12 months. We then estimate an alternative VAR specification that summarizes the term structure of inflarion risk premia by means of level, slope and curvature factors. It turns out that shocks in inflation uncertainty do not affect the slope and curvature factors, resulting only in parallel shifts in the inflation premium term structure. This is in line with the fact that the higher the inflation uncertainty, the higher is the compensation that investors will require to hold fixed rate bonds.
本研究的目的是探讨巴西名义利率和实际利率期限结构所隐含的通胀不确定性与通胀风险溢价之间的联系。我们通过巴西央行发布的焦点调查(Focus Survey)中的盈亏平衡通胀率与代理人通胀预期中位数之差来衡量后者。为了代表通胀的不确定性,我们在焦点调查中采用了12个月通胀预期的标准差。我们首先使用VAR方法估计通胀不确定性对不同视域通胀风险溢价的影响。我们发现通胀不确定性的冲击显著影响9个月、12个月、24个月和36个月的通胀风险溢价。这种影响是积极的,至少在12个月的时间里,随着年龄的增长而增加。然后,我们估计了一个替代VAR规范,该规范通过水平、斜率和曲率因素总结了通胀风险溢价的期限结构。结果表明,通货膨胀不确定性的冲击不影响斜率和曲率因子,只导致通货膨胀溢价期限结构的平行移动。这符合这样一个事实,即通胀不确定性越高,投资者持有固定利率债券所需的补偿就越高。
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引用次数: 3
期刊
Brazilian Review of Econometrics
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