Testing the optimality of aggregate consumption decisions: is there rule-of-thumb behavior?

Consumption is an important macroeconomic aggregate, being about 70% of GNP. Finding sub-optimal behavior in consumption decisions casts a serious doubt on whether optimizing behavior is applicable on an economy-wide scale, which, in turn, challenge whether it is applicable at all. This paper has several contributions to the literature on consumption optimality. First, we provide a new result on the basic rule-of-thumb regression, showing that it is observational equivalent to the one obtained in a well known optimizing real-business-cycle model. Second, for rule-of-thumb tests based on the Asset-Pricing Equation, we show that the omission of the higher-order term in the log-linear approximation yields inconsistent estimates when lagged observables are used as instruments. However, these are exactly the instruments that have been traditionally used in this literature. Third, we show that nonlinear estimation of a system of N Asset-Pricing Equations can be done efficiently even if the number of asset returns (N) is high vis-a-vis the number of time-series observations (T). We argue that efficiency can be restored by aggregating returns into a single measure that fully captures intertemporal substitution. Indeed, we show that there is no reason why return aggregation cannot be performed in the nonlinear setting of the Pricing Equation, since the latter is a linear function of individual returns. This forms the basis of a new test of rule-of-thumb behavior, which can be viewed as testing for the importance of rule-of-thumb consumers when the optimizing agent holds an equally-weighted portfolio or a weighted portfolio of traded assets. Using our setup, we find no signs of either rule-of-thumb behavior for U.S. consumers or of habit-formation in consumption decisions in econometric tests. Indeed, we show that the simple representative agent model with a CRRA utility is able to explain the time series data on consumption and aggregate returns. There, the intertemporal discount factor is significant and ranges from 0.956 to 0.969 while the relative risk-aversion coefficient is precisely estimated ranging from 0.829 to 1.126. There is no evidence of rejection in over-identifying-restriction tests.

Análise dos fatores de convencimento do juízo brasileiro quanto à ocorrência de fraude contábil: um estudo de caso Múltiplo da Gallus, da Encol e do Banco Santos

This work is based on the analysis of three Brazilian cases of condemnation by accounting fraud and financial reports manipulation of data, where we tried to identify if there is condemnation by accounting fraud in Brazil and the main factors considered by the judge to convince them about the accounting fraud. The theoretical reference quoted involves the theory of fraud, the psychology of fraud, examples of financial fraud in foreign companies and Brazilians banks and the law in Brazil regarding fraud and money laundering. The methodology consisted in studies of Brazilian cases with the data collection criteria from three law suits. The methodology used was the Contents Analysis The samples were chosen according to the impact those cases had in Brazil and the facility to access their law suits. Therefore, we chose Gallus Agropecuária S/A, Encol S/A and Banco Santos S/A for a matter of convenience. The evidence indicated that in those three cases, the court was convinced by the accounting fraud due to omission of relevant financial information in the balance sheet, by information provided to the market that didn¿t reflect the healthy of the company (assets written up without the property). It was identified as well that, in those three cases, there was condemnation not only for the accounting fraud per si, but also by the combination of other crimes as money laundering, fraud gang, material and ideological false fraud, and bankruptcy.

Vontade do tribunal ou constituição generosa? Trazendo o constituinte para o debate sobre o controle de constitucionalidade preventivo

Uma das respostas dadas à expansão dos poderes do STF responsabiliza a Assembleia Constituinte pelos poderes dados ao tribunal. O objetivo desse trabalho é comprovar que o STF avoca para si competências nunca entregues pela constituinte, mesmo em matérias em que a omissão de outros poderes não pode ser alegada. Para isso estudamos o controle preventivo de emendas fazendo uma análise comparativa entre o seu desenho na Assembleia e as mudanças ocorridas ao longo da jurisprudência da Corte.

O judiciário e a governança democrática dos recursos hídricos na região metropolitana: uma abordagem a partir do caso Matanza-Riachuelo

A previsão constitucional de competência concorrente dos entes políticos para a promoção de políticas públicas nas regiões metropolitanas abre caminho para que no caso de omissão dos poderes legislativos e executivos a questão seja judicializada. O Judiciário, como guardião dos direitos fundamentais e dos princípios democráticos, tem legitimidade para impor a cooperação entre os entes políticos a fim de que seja prestado um serviço publico eficiente e igualitário para todos os cidadãos. Essa atuação, contudo, está limitada aos princípios constitucionais e à vontade popular, além da existência de capacidade institucional e atenção aos efeitos sistêmicos. É apresentado o caso Matanza Riachuelo, em que o Judiciário condenou os entes políticos a promoverem, entre outras medidas, um plano estratégico comum. Ao final, apresenta-se uma visão crítica da atuação do Judiciário na execução desse julgado.