Revisiting the effects of regional trade agreements on trade flows with proper specification of the gravity model

This paper uses a gravity model to assess ex-post regional trade agreements. The model includes 130 countries and is estimated with panel data over the period 1962-1996. The introduction of the correct number of dummy variables allows for identification of Vinerian trade creation and trade diversion effects, while the estimation method takes into account the unobservable characteristics of each pairs of trade partner countries, the endogeneity of some of the explanatory variables as well as a potential selection bias. In contrast to previous estimates, results show that regional agreements have generated a significant increase in trade between members, often at the expense of the rest of the world.     

A risk index to model uncertain portfolio investment with options

This paper models the portfolio investment performance with options by using a risk index, which is defined as the average loss below the risk-free interest rate. Using a risk-free interest rate as the uniform reference rate for all portfolios, the risk index offers an easier-to-compare loss value than the value-at-risk return, where portfolio specific references are used to calculate the average losses. Besides, uncertainty theory is used in the paper to derive the portfolio decision when stock prices are subject to experts' estimations. By analytical computation and empirical analysis, we find that portfolios considering options generate better return than the ones without options. The empirical analysis reveals that the options can effectively hedge the risk, and the call option with a higher exercise price offers higher return per unit of option premium. Furthermore, our proposed model produces higher expected return in most cases than the model where the risk is measured by the chance of the total return failing to reach the threshold level of return.     

Interdependence or contagion: A model switching approach with a focus on Latin America

Empirical research analysing contagion has become increasingly fragmented. Different definitions of contagion have resulted in different methods being deployed to analyse financial transmission channels. This paper devises a novel econometric strategy where the nature of interdependencies, magnitude of interdependencies and transmission channels selected for inclusion can change over time. We thus appeal to multiple definitions of contagion, distinguishing between: interdependence, contagion through interdependence and abrupt contagion through changing linkages. Using our approach we analyse different crisis episodes in Latin America. Results generally indicate interdependence not contagion during the currency crises of the 1990s and Argentine crisis of 1998–2002. During the global financial crisis, results indicate abrupt contagion from the US to Argentina and Brazil. Mexico, however, experiences contagion through existing interdependencies with the US. Results also show that macroeconomic and uncertainty channels play a role during different crises not just financial channels. By establishing whether or not different interdependencies and transmission channels are present during different crises our model switching approach provides new insights.     

A dynamic CGE model for jointly accounting ageing population,automation and environmental tax reform. European Union as a case study

We develop a dynamic Computable General Equilibrium model based on the combination of different versions of GTAP utilities where alternative scenarios on ageing population trends are combined with projections on the incidence of automation into production processes and the adoption of unilateral decarbonisation policies. By simultaneously controlling for these different challenges that especially developed countries should face in the next decades, it is possible to disentangle non-linear mechanisms that will influence sustainability of public budget when the three issues are jointly combined. The European Union is taken as a case study. The first result is that ageing trends will impact fiscal sustainability reducing the EU capacity to respect the Stability and Growth Pact parameters. Second, when also considering technical change related to automation and robotics in the production process, fiscal sustainability will improve only in the case of input-neutral technological change. On the contrary, if biased technical change produces unemployment impact, negative impacts of ageing population are reinforced by automation. Third, the adoption of an environmental tax, here modelled in the form of a carbon price, leads to an improvement in environmental sustainability but has non-linear effects of fiscal sustainability.