196,880 research outputs found
Is Regional Growth in Italy Endogenous?
No full textLanzafame M. Is regional growth in Italy endogenous?, Regional Studies. This paper investigates the extent to which the natural rate of growth of the Italian regions is endogenous, in the sense that it is affected by actual growth. Using annual data for the period 1977-2003, mixed support is found for the endogeneity hypothesis. Furthermore, in line with recent findings in the literature, the analysis provides evidence of asymmetries in Okun's law when growth is endogenous. [image omitted] Lanzafame M. La croissance regionale en Italie, est-elle vraiment endogene?, Regional Studies. Cet article cherche a examiner dans quelle mesure le taux de croissance naturel des regions italiennes est endogene, en ce sens que elle est touchee par la croissance reelle. A partir des donnees annuelles pour la periode allant de 1977 jusqu'a 2003, on trouve du soutien mitige en faveur de l'hypothese endogene. Qui plus est, en accord avec des resultats recents dans la documentation, l'analyse fournit des preuves des asymetries dans la loi Okun quand la croissance est endogene. Croissance endogene Loi Okun Regions italiennes Lanzafame M. Ist das regionale Wachstum in Italien endogen?, Regional Studies. In diesem Beitrag wird untersucht, in welchem Ausmass die naturliche Wachstumsrate in den italienischen Regionen insofern endogen ausfallt, als dass sie vom tatsachlichen Wachstum beeinflusst wird. Anhand von Jahresdaten aus dem Zeitraum von 1977 bis 2003 stellen wir fest, dass fur die Hypothese der Endogenitat unterschiedliche Belege vorhanden sind. Daruber hinaus liefert unsere Analyse in Ubereinstimmung mit den jungsten Ergebnissen der Literatur Hinweise darauf, dass das Okunsche Gesetz bei einem endogenen Wachstum Asymmetrien aufweist. Endogenes Wachstum Okunsches Gesetz Italienische Regionen Lanzafame M. �Es endogeno el crecimiento regional en Italia?, Regional Studies. En este articulo investigamos en que medida la tasa natural de crecimiento en las regiones italianas es endogena en la medida en que este afectada por el crecimiento real. Con ayuda de datos anuales durante el periodo 1977-2003, observamos un apoyo mezclado para la hipotesis de endogeneidad. Ademas, de acuerdo con resultados recientes en la literatura, nuestro analisis ofrece ejemplos de asimetrias en la Ley de Okun cuando el crecimiento es endogeno. Crecimiento endogeno Ley de Okun Regiones italianasEndogenous growth, Okun's law, Italian regions,
Dike emplacement and related hazard in volcanoes with sector collapse: the 2007 Stromboli (Italy) eruption
No full textUnderstanding dike propagation is fundamental for hazard mitigation. In February 2007, two effusive vents opened (at 650 and 400 m a.s.l.) along the inner flank of Sciara del Fuoco (SdF) sector collapse at Stromboli. The summit craters collapsed, obstructing the central conduit, choking the vents and increasing the deformation within SdF. Here a new vent opened (500 m a.s.l.), releasing the deformation. The eruption continued from the 400 m vent, after a summit explosion, until early April. The vents were fed by laterally propagating feeder dikes, following the maximum gravitational stresses within a cone with sector collapse. Vent location is similar to that of the 2002-2003 eruption, fed by dikes triggering landslides and tsunami. Such a dike propagation represents a constant feature of the recent Stromboli eruptions. However, this eruption did not develop catastrophic landslides, suggesting that their triggering also depends on other factors, such as the magmatic pressure
Finance, globalisation, technology and inequality: Do nonlinearities matter?
No full textRelying on data for 90 economies over 1970-2015 and panel estimation techniques, we investigate how financial development, globalisation and technology affect income inequality. Our findings reveal significant nonlinearities, consistent with either Ushaped or inverted-U shaped relationships. As such, depending on whether a certain threshold value is achieved, the same determinants of income distribution exert opposite effects in different countries. Globalisation is associated with increasing inequality in most advanced economies, but with falling disparities for the large majority of emerging economies. Technology and financial development lead to increasing inequality for most emerging economies, while the effects for advanced economies are mixed. Furthermore, our results indicate that credit constraints act as a transmission channel for the effects of financial development on inequality, foreign direct investment and the supply of unskilled labour for the impact of technology and the supply of skilled labour for the effects of globalisation
Structural features of the 2007 Stromboli eruption
No full textOn 27 February 2007, two NE–SW and NNW–SSE dike-fed effusive vents opened to the North (at 650 and
400 m above sea level, asl) of the summit craters at Stromboli, forming a fissure parallel to the inner walls of
the Sciara del Fuoco (SdF) sector collapse depression. The formation of these vents was soon followed by
rapid subsidence of the summit crater area. This partly obstructed the central conduit, temporarily choking
the fissure and increasing the deformation of the upper part of SdF. The reactivation of the NNW–SSE vent
and the opening of a new vent located at 500 m asl, fed by a second dike, released the internal pressure and
surface deformation ceased. The eruption then continued again from the 400 m vent, after a summit
explosion on 15 March, until ending in early April after a progressive decrease of magma output. Repeated
NE–SW dike intrusions have occurred in recent years, close to the upper SE limit of the SdF. In that zone,
named Bastimento, the eruptive fractures traced the discontinuities that borders the SdF, increasing the risk
of triggering new sector collapse. Whereas the NE–SW trending structures lie along the regional volcanostructural
trend of the Aeolian arc through Stromboli, the NNW–SSE vents are oblique to this trend and may
be controlled by the anomalous stress field within the unstable flank of the SdF. Another fundamental aspect
of the 2007 eruption is the collapse of the central conduit, due to the rapid and deep magma drainage linked
to the opening of the 400 m vent. The intrusion of dikes and development of flank vents during the 2007
eruption could possibly have triggered catastrophic landslides and related tsunami or eruptive paroxysms,
but the opening of new effusive vents released the internal pressures, diminishing the hazard.Work funded by INGV and Dipartimento Protezione Civile, Italy.Published137-1441.5. TTC - Sorveglianza dell'attività eruttiva dei vulcani3.2. Tettonica attiva3.5. Geologia e storia dei vulcani ed evoluzione dei magmi3.6. Fisica del vulcanismo4.3. TTC - Scenari di pericolosità vulcanicaJCR Journalreserve
Unusual, rapidly growing ulcerative genital mass due to herpes simplex virus in a human immunodeficiency virus-infected woman.
No full textUnusual, rapidly growing ulcerative genital mass due to herpes simplex virus in a human immunodeficiency virus-infected woman
Progressive multifocal leukoencephalopathy in an HIV patient receiving successful long-term HAART
No full textProgressive multifocal leukoencephalopathy (PML) has been traditionally associated to severe immunosuppression and described mainly in highly active antiretroviral therapy (HAART)-naïve patients with a low lymphocyte CD4+ count. In the last years, some cases of PML have been described in HIV patients with a higher CD4+ count shortly after initiation of HAART and in association with the immune reconstitution inflammatory syndrome (IRIS). We report on a rare case of PML, not IRIS associated, that occurred in a HIV-positive patient with a lymphocyte CD4+ count greater than 700/μl and with an undetectable HIV viral load resulting from a long-term HAART. We describe the pathological and the ultrastructural features of the brain lesion. This case confirms that a severe immunosuppression or an IRIS is not required for the development of PML in HIV positives. The diagnosis of PML should always be considered in patients with consistent neurological symptoms, even with a high lymphocyte CD4+ level and a full viral suppression resulting from a long-term HAART
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