Econometric Modelling of Long-Distance Domestic Travel

The main goal of this study is to determine the effects of socio-economic, demographic and land-use factors on long-distance travel. Intercity trips are not very frequent activities, which caused a large share of the survey respon-dents to report zero kilometres travelled. The Double Hurdle Model, Infrequent Purchase Model and Heckman Selection Models are estimated. Distance tra-velled in trips longer than 50 km. is a function of gender, age, income, size of municipality, region of residence, mode of transport and trip purpose. Results indicate that zeroes reported in the survey are caused by corner solutions, which allow us to make recommendations about designing long-distance sur-veys

Relations between the sedimentary evolution of the Aren Group and the Boixols thrust (Uppermost CampanianMaastrichtian of South-Central Pyrenees)

The Arén Croup was deposited synchronously to the growth of the Boixols thrust. Sedimentation took place in siliciclastic marine and alluvial environments. The growth of a footwall syncline affected the geometry of the basin fill by adding drowning and uplifting movements. Such a mechanism might be common to those settings where fault propagation folds develop. In the Arén Croup, this differential subsidence mechanism was not able to overprint the identified sedimentary cycle

Modelización econométrica de los viajes nacionales de larga distancia

The main goal of this study is to determine the effects of socio-economic, demographic and land-use factors on long-distance travel. Intercity trips are not very frequent activities, which caused a large share of the survey respondents to report zero kilometres travelled. The Double Hurdle Model, Infrequent Purchase Model and Heckman Selection Models are estimated. Distance travelled in trips longer than 50 km. is a function of gender, age, income, size of municipality, region of residence, mode of transport and trip purpose. Results indicate that zeroes reported in the survey are caused by corner solutions, which allow us to make recommendations about designing long-distance surveys.El objetivo principal de este estudio es analizar los efectos de los factores socioeconómicos, demográficos y de uso del suelo sobre los viajes de larga distancia. Este tipo de viajes son actividades que se realizan con una frecuencia baja lo que provoca que en los datos recogidos por las encuestas una amplia proporción de las respuestas sea de cero kilómetros viajados. Para tratar esta peculiaridad de los datos se estiman Modelos de Doble Valla, Modelos de Infrecuencia de Compra y Modelos de Selección de Heckman. La distancia recorrida en los viajes de más de 50 kilómetros es función del género, la edad, y la renta del encuestado, del tamaño del municipio y la región de residencia así como del modo de transporte y del propósito del viaje. Los resultados indican que los ceros recogidos en la encuesta son provocados por soluciones de esquina, lo cual permite hacer recomendaciones acerca del diseño de encuestas de viajes de larga distancia

Intra-urban house prices in Madrid following the financial crisis: an exploration of spatial inequality

In this paper we explore the temporal dynamics of spatial inequality in housing prices for Madrid, the capital city of Spain. Spatial inequalities are a concerning feature of urban areas across the globe. It has been suggested that within cities housing prices are becoming more geographically unequal over time, particularly since the 2008 housing market crash. However, more evidence is needed at the intra-urban level to understand neighbourhood house price differences in large urban areas. Changes are analysed during a key period of the housing market bust (2010–2015) and boom (2016–2019), using data from a major housing listing portal. Fine grain space-time analysis of the distribution of housing prices supports an increase in spatial inequality and polarisation at the neighbourhood level. Two spatially differentiated housing sub-markets of high- and low-priced housing are identified. The persistence and growth of spatial house price inequality has important societal implications for the wealth gap and segregation of rich and poor in cities