3,247 research outputs found
AlteraçÔes oftalmológicas na gravidez
Pregnancy is needed for the perpetuation of the human species, and it leads to physiological adaptations of the various maternal organs and systems. The eye, although a closed space, also undergoes some modifications, most of which are relatively innocuous, but they may occasionally become pathological. For women, pregnancy is a susceptibility period; however, for many obstetricians, their knowledge of the ocular changes that occur during pregnancy tends to be limited. For this reason, this is a important area of study as is necessary the development of guidelines to approach those changes. Of equal importance are the knowledge of the possible therapies for ophthalmological problems in this period and the evaluation of the mode of delivery in particular conditions. For this article, an extensive review of the literature was performed, and a summary of the findings is presented.A gravidez Ă© necessĂĄria Ă perpetuação da espĂ©cie humana, levando a adaptaçÔes fisiolĂłgicas dos diversos ĂłrgĂŁos e sistemas maternos. O olho, apesar de uma cavidade fechada, sofre tambĂ©m algumas modificaçÔes, a maioria relativamente inĂłcuas, que pontualmente poderĂŁo se tornar patolĂłgicas. A gravidez assume-se como um perĂodo particular de suscetibilidade para a mulher; no entanto, muitos obstetras tĂȘm conhecimento limitado sobre as alteraçÔes oftalmolĂłgicas na gravidez. Por conseguinte, impĂ”e-se o seu estudo, bem como a elaboração de diretrizes para lidar com essas mudanças. De igual importĂąncia sĂŁo o conhecimento da eventual terapĂȘutica para problemas oftalmolĂłgicos neste perĂodo e a avaliação do tipo do parto em condiçÔes particulares. Desta forma, foi efetuada uma revisĂŁo bibliogrĂĄfica extensa e apresentada uma sĂntese do tema.info:eu-repo/semantics/publishedVersio
Has core inflation been doing a good job in Brazil?
This paper assesses the performance of the core inflation measures calculated by the Brazilian Central Bank (BCB). The evidence shows that they do not meet some key statistical criteria that a good core inflation should have: unbiasedness and the ability to forecast inflation. That performance stems, to a large extent, from the lack of a well-grounded statistical and economical basis behind them. Three new measures are built and assessed using the same criteria. The evidence shows that their behaviour is more in accordance to what the theory claims. However, they still lack the ability to help forecasting inflation. Hence both the BCB and the market should use core inflation cautiously.Core inflation; inflation; supply shocks; relative prices; volatility
Forecasting Brazilian Inflation Using a Large Data Set
The objective of this paper is to verify if exploiting the large data set available to the Central Bank of Brazil, makes it possible to obtain forecast models that are serious competitors to models typically used by the monetary authorities for forecasting inflation. Some empirical issues such as the optimal number of variables to extract the factors are also addressed. I find that the best performance of the data rich models is usually for 6-step ahead forecasts. Furthermore, the factor model with targeted predictors presents the best results among other data-rich approaches, whereas PLS forecasts show a relative poor performance.
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