Measuring the effectiveness of volatility auctions

We propose a method for event studies based on synthetic portfolios that provides a robust data-driven approach to build a credible counterfactual. The method is used to evaluate the effectiveness of volatility auctions using intraday data from the Colombian Stock Exchange. The results indicate that the synthetic portfolio method provides an accurate way to build a credible counterfactual that approximates the behavior of the asset if the auction had not taken place. The main results indicate that the volatility auction mitigates the volatility of the asset, but its effect on liquidity and trading activity is ambiguous at best

Planeación y gestión estratégica

Trabajo en el se presenta el plan de negocios utilizado en el simulador de negocios Capstone que se desenvuelve en la industria de los sensores. El objetivo fue aplicar una estrategia genérica, utilizar herramientas y analizar las diferentes áreas de una organización. La estrategia incluye la revisión de los departamentos de investigación y desarrollo, producción, mercadotecnia, recursos humanos, calidad y finanzas

International Pediatric Otolaryngology Group (IPOG) consensus recommendations: Hearing loss in the pediatric patient

Objective To provide recommendations for the workup of hearing loss in the pediatric patient. Methods Expert opinion by the members of the International Pediatric Otolaryngology Group. Results Consensus recommendations include initial screening and diagnosis as well as the workup of sensorineural, conductive and mixed hearing loss in children. The consensus statement discusses the role of genetic testing and imaging and provides algorithms to guide the workup of children with hearing loss. Conclusion The workup of children with hearing loss can be guided by the recommendations provided herein

Continuación del programa de desarrollo de habilidades interpersonales en una empresa de servicio de transporte: manejo de conflictos y negociación

El nombre del proyecto de este PAP es Continuación del programa de desarrollo de habilidades interpersonales en una empresa de servicio de trasporte: Manejo de Conflictos y Negociación y el propósito general se basa en su relación con dos PAP’s anteriores. En el PAP de otoño 2021 el proyecto con el que se trabajó fue: “Realización de un diagnóstico para tipificar la cultura organizacional, en una empresa dedicada al transporte de personal, con el objetivo de fortalecer su proceso de cambio estratégico”. El propósito general fue diagnosticar la cultura organizacional de la empresa. Esta intervención fue la primera que la empresa tuvo con la universidad. Después de esto en el PAP de primavera 2022 se seleccionaron los temas a través de una reunión del equipo PAP junto con un grupo de colaboradores de la empresa, tales como la directora general y la coordinadora del talento humano. Se decidió de manera conjunta, que la empresa requiere darle continuación a las acciones pasadas para abordar las problemáticas en las áreas de comunicación efectiva, liderazgo y trabajo en equipo, además de que se requiere la capacitación para el manejo del conflicto y la capacidad de negociación por parte de los colaboradores. Durante este PAP nos enfocamos en brindar talleres abordando principalmente los últimos dos temas. Los talleres se impartieron a 4 grupos de dos sesiones cada uno. Además de esto, se dio continuación a un grupo del PAP de primavera 2022 abordando los temas de comunicación, liderazgo y trabajo en equipo.ITESO, A.C

The Role of Inflammatory Mediators in the Pathogenesis of Otitis Media and Sequelae

This review deals with the characteristics of various inflammatory mediators identified in the middle ear during otitis media and in cholesteatoma. The role of each inflammatory mediator in the pathogenesis of otitis media and cholesteatoma has been discussed. Further, the relation of each inflammatory mediator to the pathophysiology of the middle and inner ear along with its mechanisms of pathological change has been described. The mechanisms of hearing loss including sensorineural hearing loss (SNHL) as a sequela of otitis media are also discussed. The passage of inflammatory mediators through the round window membrane into the scala tympani is indicated. In an experimental animal model, an application of cytokines and lipopolysaccharide (LPS), a bacterial toxin, on the round window membrane induced sensorineural hearing loss as identified through auditory brainstem response threshold shifts. An increase in permeability of the blood-labyrinth barrier (BLB) was observed following application of these inflammatory mediators and LPS. The leakage of the blood components into the lateral wall of the cochlea through an increase in BLB permeability appears to be related to the sensorineural hearing loss by hindering K+ recycling through the lateral wall disrupting the ion homeostasis of the endolymph. Further studies on the roles of various inflammatory mediators and bacterial toxins in inducing the sensorineumral hearing loss in otitis media should be pursued

Impact of COVID-19 on cardiovascular testing in the United States versus the rest of the world

Objectives: This study sought to quantify and compare the decline in volumes of cardiovascular procedures between the United States and non-US institutions during the early phase of the coronavirus disease-2019 (COVID-19) pandemic. Background: The COVID-19 pandemic has disrupted the care of many non-COVID-19 illnesses. Reductions in diagnostic cardiovascular testing around the world have led to concerns over the implications of reduced testing for cardiovascular disease (CVD) morbidity and mortality. Methods: Data were submitted to the INCAPS-COVID (International Atomic Energy Agency Non-Invasive Cardiology Protocols Study of COVID-19), a multinational registry comprising 909 institutions in 108 countries (including 155 facilities in 40 U.S. states), assessing the impact of the COVID-19 pandemic on volumes of diagnostic cardiovascular procedures. Data were obtained for April 2020 and compared with volumes of baseline procedures from March 2019. We compared laboratory characteristics, practices, and procedure volumes between U.S. and non-U.S. facilities and between U.S. geographic regions and identified factors associated with volume reduction in the United States. Results: Reductions in the volumes of procedures in the United States were similar to those in non-U.S. facilities (68% vs. 63%, respectively; p = 0.237), although U.S. facilities reported greater reductions in invasive coronary angiography (69% vs. 53%, respectively; p < 0.001). Significantly more U.S. facilities reported increased use of telehealth and patient screening measures than non-U.S. facilities, such as temperature checks, symptom screenings, and COVID-19 testing. Reductions in volumes of procedures differed between U.S. regions, with larger declines observed in the Northeast (76%) and Midwest (74%) than in the South (62%) and West (44%). Prevalence of COVID-19, staff redeployments, outpatient centers, and urban centers were associated with greater reductions in volume in U.S. facilities in a multivariable analysis. Conclusions: We observed marked reductions in U.S. cardiovascular testing in the early phase of the pandemic and significant variability between U.S. regions. The association between reductions of volumes and COVID-19 prevalence in the United States highlighted the need for proactive efforts to maintain access to cardiovascular testing in areas most affected by outbreaks of COVID-19 infection