Coauthorship and Thematic Networks in AAEP Annual Meetings

We analyze the coauthorship production of the AAEP Annual Meeting since 1964. We use social network analysis for creating coauthorship networks and given that any paper must be tagged with two JEL codes, we use this information for also structuring a thematic network. Then we calculate network metrics and find main actors and clusters for coauthors and topics. We distinguish a gender gap in the sample. Thematic networks show a cluster of codes and the analysis of the cluster shows the preeminence of the tags related to trade, econometric, distribution/poverty and health and education topics.Comment: 30 pages, 12 Figures, 16 Table

Adapting the Unique Minds Program: exploring the feasibility of a multiple family intervention for children with learning disabilities in the context of Spain

[Abstract] The Unique Minds Program (Stern, Unique Minds Program, 1999) addresses the socio-emotional needs of children with learning disabilities (LD) and their families. Children and their parents work together in a multiple family group to learn more about LD and themselves as people with the capacity to solve problems in a collaborative way, including problems in family school relationships. This article reports the cultural adaptation of the program for use in Spain and findings from a feasibility study involving three multiple family groups and a total of 15 children and 15 mothers, using a pre-post design. This Spanish adaptation of the program is called “Mentes Únicas”. Standardized outcome measures indicated an overall statistically significant decrease in children's self-rated maladjustment and relationship difficulties by the end of the program. Improvements were endorsed by most mothers, although they were not always recognized by the children's teachers. The program had a high level of acceptability: Mothers and children felt safe, understood, and helped throughout the sessions. The efficacy of the adapted intervention for the context of Spain remains to be tested in a more rigorous study

Neural progenitor cell implants modulate vascular endothelial growth factor and brain-derived neurotrophic factor expression in rat axotomized neurons

Axotomy of central neurons leads to functional and structural alterations which largely revert when neural progenitor cells (NPCs) are implanted in the lesion site. The new microenvironment created by NPCs in the host tissue might modulate in the damaged neurons the expression of a high variety of molecules with relevant roles in the repair mechanisms, including neurotrophic factors. In the present work, we aimed to analyze changes in neurotrophic factor expression in axotomized neurons induced by NPC implants. For this purpose, we performed immunofluorescence followed by confocal microscopy analysis for the detection of vascular endothelial growth factor (VEGF), brain-derived neurotrophic factor (BDNF), neurotrophin-3 (NT-3) and nerve growth factor (NGF) on brainstem sections from rats with axotomy of abducens internuclear neurons that received NPC implants (implanted group) or vehicle injections (axotomized group) in the lesion site. Control abducens internuclear neurons were strongly immunoreactive to VEGF and BDNF but showed a weak staining for NT-3 and NGF. Comparisons between groups revealed that lesioned neurons from animals that received NPC implants showed a significant increase in VEGF content with respect to animals receiving vehicle injections. However, the immunoreactivity for BDNF, which was increased in the axotomized group as compared to control, was not modified in the implanted group. The modifications induced by NPC implants on VEGF and BDNF content were specific for the population of axotomized abducens internuclear neurons since the neighboring abducens motoneurons were not affected. Similar levels of NT-3 and NGF immunolabeling were obtained in injured neurons from axotomized and implanted animals. Among all the analyzed neurotrophic factors, only VEGF was expressed by the implanted cells in the lesion site. Our results point to a role of NPC implants in the modulation of neurotrophic factor expression by lesioned central neurons, which might contribute to the restorative effects of these implants

Contactos, especialización y litigios : una revisión del papel del capital humano y social en la profesión legal

La profesión legal representa un sector laboral gravitante tanto en la política cómo en la economía de países desarrollados y subdesarrollados. Su trabajo en el sector privado consiste en atender las demandas de consultoría legal de los clientes ¿Qué recursos utilizan los profesionales para acercar dicha demanda a su propia oferta? Mucho de su trabajo en el sector privado es obtenido gracias al nivel de capital humano del profesional mientras que otro tanto lo es a través del uso de los recursos insertos en su capital social. El capital humano representa los conocimientos específicos de un profesional para desenvolverse profesionalmente. El capital social, por otra parte, representa la inversión de un individuo en relaciones sociales con retornos esperados. Este trabajo realiza una revisión de la bibliografía enfocándose en la profesión de abogados y su relación con estas dimensiones del capital. Particular interés se presta a la relación que existe entre estas formas de capital y la efectividad en el desempeño profesional

Local generic behavior of a planar Filippov system with non-smooth switching curve

The version of record is available online at: http://dx.doi.org/10.1007/s40863-021-00270-zThis paper discusses the generic local classification of typical singularities of 2D piecewise smooth vector fields when the switching set is an non smooth curve. The main goal is to obtain classification results concerning structural stability and generic codimension one local bifurcations.Tere M. Seara the Catalan Grant 2014SGR504. Tere M-Seara is also supported by the Russian Scientic Foundation grant 14-41-00044 and the European Marie Curie Action FP7-PEOPLE-2012-IRSES: BREUDS. J. Larrosa has been supported by FAPESP grants 2011/22529-8 and 2014/13970-0 and the European Marie Curie Action FP7-PEOPLE-2012-IRSES: BREUDS.Peer ReviewedPostprint (author's final draft

Regularization around a generic codimension one fold-fold singularity

This paper is devoted to study the generic fold-fold singularity of Filippov systems on the plane, its unfoldings and its Sotomayor–Teixeira regularization. We work with general Filippov systems and provide the bifurcation diagrams of the fold-fold singularity and their unfoldings, proving that, under some generic conditions, is a codimension one embedded submanifold of the set of all Filippov systems. The regularization of this singularity is studied and its bifurcation diagram is shown. In the visible–invisible case, the use of geometric singular perturbation theory has been useful to give the complete diagram of the unfolding, specially the appearance and disappearance of periodic orbits that are not present in the Filippov vector field. In the case of a linear regularization, we prove that the regularized system is equivalent to a general slow-fast system studied by Krupa and SzmolyanPeer ReviewedPostprint (published version

Non cooperative stackelberg network formation.

Non-cooperative network formation games in industrial organizations analyzehow firms create links. We assume that links portray cost-reducing informationand that access to this information is not reciprocal. We study the consequences interms of profits if one firm can move first in establishing a link. A classic modelof exogenous Stackelberg leadership is developed and first-mover advantage isobserved.Non-cooperative network formation games in industrial organizations analyzehow firms create links. We assume that links portray cost-reducing informationand that access to this information is not reciprocal. We study the consequences interms of profits if one firm can move first in establishing a link. A classic modelof exogenous Stackelberg leadership is developed and first-mover advantage isobserved

Caustic Ingestion in Children

Caustic ingestion (CI) is an unfortunate event that occurs in families with a poor prevention culture. Its prevalence is unknown in developing countries; it occurs mainly in children < 5 years and is more common in boys. The chemical caustic agents are alkaline (85%) or acid products stored in food or beverage containers without warning labels and safety caps. The immediate symptoms include salivation, oropharyngeal burns, vomiting and oropharyngeal/retrosternal pain. Upper endoscopy is the first‐line tool to identify the type and extension of oesophageal and gastric damage. A barium swallow performed 2–3 weeks after the CI may identify oesophageal stricture. Dysphagia occurs in about one‐third of cases. Regarding the nutritional status, children with dysphagia and/or oesophageal strictures may have lower fat reserves or muscle mass than the cases without these complications, meaning impaired nutritional status. All patients should be hospitalized for evaluation and treatment. Hemodynamic stabilization and adequacy of the patient’s airway are priorities; vomiting induction and gastric lavage are contraindicated. Methylprednisolone in II-b oesophageal burns for 3 days diminishes the risk of stricture. Selected cases will require oesophageal dilatations, gastrostomy or oesophageal replacement by colon or stomach. There are other promising agents in the management of caustic oesophageal strictures