This paper studies the time series effect of changes in liquidity on optimal portfolio allocations. Using a nonparametric approach, we are able to handle models that are analytically intractable. Specifically, we directly estimate optimal portfolio weights for a CRRA investor as functions of...

We decompose annual average years of schooling series for Portugal into different schooling levels series. By estimating a number of vector autoregressions, we provide measures of aggregate and disaggregate economic growth impacts of different education levels. Increasing education at all levels...

In this paper we use two alternative approaches to study the extent of gender wage discrimination in Portugal. Both methods involve the estimation of wage equations for males and females and the Blinder [1973] and Oaxaca [1973] decomposition. However, to take into account possible sample...

We decompose an annual average years of schooling series for Portugal into different schooling levels series. By estimating a number of vector autoregressions, we provide measures of aggregate and disaggregate economic growth impacts of different education levels. Increasing education at all...

Este artigo tem por objectivo analisar a mobilidade geográfica em Portugal tendo como domínio de referência a distância da deslocação. Tanto quanto é do nosso conhecimento, este é o primeiro trabalho que aborda esta questão em Portugal. A análise é efectuada com base num modelo logit...

Unlike previous studies, in this paper we estimate the contribution of covariates for the regional wage decomposition components along the wage distribution employing Firpo et al. (2009) method. We consider the case of Portugal, a country with persistent and large regional wage gaps. We find...

<title>Abstract</title>This paper uses logistic regression analysis to examine how intramural and extramural R&D, acquisition of machinery, equipment and software, acquisition of external knowledge, training, market introduction and other procedures and technical preparations determine the innovation behaviour...

Using standardised firm data a comparative analysis of the determinants of product and process innovation in manufacturing and services is performed. Results show that in services there are significant differences in innovation behaviour, in terms of intramural and extramural R&D. It is also...