Twitter text data may be very useful to predict financial tangibles, such as share prices, as well as intangible assets, such as company reputation. While twitter data are becoming widely available to researchers, methods aimed at selecting which twitter data are reliable are, to our knowledge,...

This paper investigates the relationships between export price and income elasticities, average unit values (AUVs) and market shares for the top world food exporters in the time period 1992-2011 using a panel data framework. Emerging countries and Spain show a high price elasticity unlike other...

We investigate competitive, selection and reallocation effects in monopolistic competition trade models. We argue that departing from CES preferences in an otherwise standard Dixit-Stiglitz setup with additive preferences seems to involve implausible assumptions about consumer behavior and...

We examine the role of per capita income in closed and open economy models of monopolistic competition based on non-homothetic directly additive preferences a la Dixit-Stiglitz, as in Krugman (1979). In a closed economy with free entry income is always neutral on markups and firm size. In a...

We study empirically the role of air service in boosting exports. We focus on the link between non-stop flights and outgoing trade of the Italian manufacturing sector in Europe using a panel of 12,000 half- yearly observations ranging from 1998 to 2010. The analysis shows that the supply of...

In this paper I investigate the role of an increasingly demanded class of green services, characterised by having strong roots in local communities, high human labour intensity, flat labour productivity growth and a low impact on the environment. In order to do so, I build an endogenous growth...

The measurement of the quality of academic research is a rather controversial issue. Recently Hirsch has proposed a measure that has the advantage of summarizing in a single summary statistics all the information that is contained in the citation counts of each scientist. From that seminal...

The performance of predictions models can be assessed using a variety of methods and metrics. Several new measures have recently been proposed that can be seen as refinements of discrimination measures, including variants of the AUC (Area Under the ROC curve), such as the H index. It is widely...

In this contribution we aim at improving ordinal variable selection in the context of causal models. In this regard, we propose an approach that provides a formal inferential tool to compare the explanatory power of each covariate, and, therefore, to select an effective model for classification...

We investigate competition for FDI within a region when a foreign multinational firm can profitably exploit differences in statutory corporate tax rates by shifting taxable profits to lower-tax jurisdictions. In such framework we show that targeted tax competition may lead to higher welfare for...