This paper provides a theoretical functional representation of the density function related to the Dickey- Fuller random variable. The approach is extended to cover the multivariate case in two special frameworks: the independence and the perfect correlation of the series.

This paper describes CADFtest, a R (R Development Core Team 2008) package for testing for the presence of a unit root in a time series using the Covariate Augmented Dickey-Fuller (CADF) test proposed in Hansen (1995). The procedures presented here are user friendly, allow fully automatic model...

This paper provides an assessment of the existing preferences on the products currently exported in a few key developed countries’ markets: EU, Japan and US. The analysis is undertaken drawing on the trade preferences database provided by the most recent version (release 6) of the GTAP...

Principal Component Analysis (PCA) is a well known technique the aim of which is to synthesize huge amounts of numerical data by means of a low number of unobserved variables, called components. In this paper, an extension of PCA to deal with interval valued data is proposed. The method, called...

The effect of spatial agglomeration (localisation and urbanisation economies) on employment growth is explored over a balanced panel of 23,374 Italian firms, using a flexible Bayesian model. Contrary to previous research, the agglomeration economies measures are calculated using direct measures...

We develop a two period model to investigate what makes the promise to repay public debt credible. We explor a political solution excluding any role for long-run reputational arguments. There are two sources of heterogeneity among individuals: wealth and income. Differences in asset holdings...

The aim of the paper is to investigate the indirect impact of internationalisation process, undertaken by the district firms located in Veneto region (north-eastern Italy), on the logistics’ employment change within the same industrial districts. The results of the empirical analysis have...

The false discovery rate (FDR) first introduced in Benjamini and Hochberg (1995) is a powerful approach to multiple testing. Benjamini and Yekutieli (2001) proved that the original procedure developed for independent test statistics controls the FDR also for positively dependent test statistics....

This paper presents the R implementation of the panel covariate augmented Dickey-Fuller (panel-CADF) test proposed in Costantini and Lupi (2011), as well as the implementation of the tests advocated in Choi (2001) and Demetrescu, Hassler, and Tarcolea (2006). A panel-CADF extension of the test...

The false discovery rate (FDR, Benjamini and Hochberg 1995) is a powerful approach to multiple testing. However, the original approach developed by Benjamini and Hochberg (1995) applies only to independent tests. Yekutieli (2008) showed that a modification of the Benjamini-Hochberg (BH) approach...