João Silva

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We critically review the recent literature on currency unions, and discuss the methodological challenges posed by the empirical assessment of their costs and benefits. In the process, we provide evidence on the economic effects of the euro. In particular, and in contrast with estimates of the trade effect of other currency unions, we find that the impact of(More)
This paper elaborates on the alternative measure of persistence recently suggested in Marques (2004), which is based on the idea of mean reversion. A formal distinction between γ , the unconditional probability of a given process not crossing its mean in period t and $ γ , its estimator, is made clear and the relationship between γ and , the widely used "(More)
Note : The Discussion Papers in this series are prepared by members of the Department of Economics, University of Essex, for private circulation to interested readers. They often represent preliminary reports on work in progress and should therefore be neither quoted nor referred to in published work without the written consent of the author. Abstract In(More)
Annotated corpora are fundamental for NLP, and the trend in their development is to move towards datasets with increasingly detailed linguistic annotation. To cope with the complexity of producing such resources, some approaches rely on a supporting deep processing grammar that provides annotation that is rich and consistent over its morphological,(More)
Note : The Discussion Papers in this series are prepared by members of the Department of Economics, University of Essex, for private circulation to interested readers. They often represent preliminary reports on work in progress and should therefore be neither quoted nor referred to in published work without the written consent of the author. Abstract(More)
The gravity equation for trade flows is one of the most successful empirical models in economics and has long played a key role in the trade literature (Anderson 2011). Different ways to estimate the gravity equation have been proposed, reduced-form or more structural. This paper shows that some of these differences are small when gravity is estimated with(More)
We present a Portuguese↔English hybrid deep MT system based on an analysis-transfer-synthesis architecture, with transfer being done at the level of deep syntax, a level that already includes a great deal of semantic information. The system received a few months of development, but its performance is already similar to that of baseline phrase-based MT, when(More)
Note : The Discussion Papers in this series are prepared by members of the Department of Economics, University of Essex, for private circulation to interested readers. They often represent preliminary reports on work in progress and should therefore be neither quoted nor referred to in published work without the written consent of the author. Abstract This(More)