Author: alvarohofflinger

Publicaciones

Out of Sight, Out of Mind: Participatory Sensing for Monitoring Indoor Air Quality.

alvarohofflinger

Àlex Boso, Boris Álvarez, Christian Oltra, Jaime Garrido, Carlos Muñoz & Álvaro Hofflinger 

Abstract

In southern Chile, epidemiological studies have linked high levels of air pollution produced by the use of wood-burning stoves with the incidence of numerous diseases. Using a quasi-experimental design, this study explores the potential of participatory sensing strategies to transform experiences, perceptions, attitudes, and daily routine activities in 15 households equipped with wood-burning stoves in the city of Temuco, Chile. The results suggest that the experience of using a low-cost sensor improves household members’ awareness levels of air pollution. However, the information provided by the sensors does not seem to improve the participants’ self-efficacy to control air quality and protect themselves from pollution. The high degree of involvement with the participatory sensing experience indicates that the distribution of low-cost sensors could be a key element in the risk communication policies.

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Publicaciones

Narratives of Resistance to Technological Change: Drawing Lessons for Urban Energy Transitions in Southern Chile.

alvarohofflinger

Àlex Boso, JaimeGarrido, Boris Álvarez, Christian Oltra, ÁlvaroHofflinger & Germán Gálvez

Abstract

Several cities in southern Chile are immersed in energy transition processes due to the severe air pollution that the massive use of firewood for domestic heating and cooking has generated. Semi-structured interviews and news analysis of local newspapers were combined to explore the narratives of residents of Temuco and Padre Las Casas, two of the most polluted cities in Latin America. The study uses some aspects of the innovation systems theory to try to understand the social origins of the narratives of resistance to technological change in a city where most homes use wood-burning stoves and cookers. Few studies have employed narratives to study urban energy transitions. A rich narrative about the complexity of technological change emerged from the interviews, offering valuable insights into energy transition research. The results show the relevance of early events in energy transitions in the development of these transitions. The narrative dichotomy between hero and horror stories emerges as a social mechanism capable of slowing the diffusion of emerging energy technologies. The findings of this study suggest that narratives of resistance to change constitute a critical issue that local governments must learn to manage in the transitions toward scenarios of greater urban sustainability.

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Publicaciones

Breathing Clean Air or Cheaply Heating Your Home: An Environmental Justice Dilemma in Chilean Patagonia.

alvarohofflinger

Àlex Boso, Álvaro Hofflinger, Jaime Garrido & Boris Álvarez

Abstract

Cities in southern Chile face serious environmental pollution due to extensive use of firewood for heating and cooking. Lack of access to cleaner energy fuel, low-efficiency building materials, and a cold climate exacerbate the problem, which increases the deforestation of the native forests of Patagonia. While environmental justice research has established clear links between air pollution hazards and vulnerable populations, little is known about how this relationship influences the risk perception and adaptation strategies among all urban residents. This study assesses social vulnerability variables, indoor environments, and air pollution adaptation strategies in households located in the city of Coyhaique by monitoring households’ temperatures and conducting semistructured interviews with residents. Focused on interactions between people and their indoor and outdoor environments, this study reveals the microscale hazards and difficulties in overcoming the dilemma between breathing clean air and cheap heating as additional dimensions of environmental injustice.

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Publicaciones

The Data Revolution Comes to Higher Education: Identifying Students at Risk of Dropout in Chile.

alvarohofflinger

Paul T. von Hippel & Álvaro Hofflinger

Abstract

Enrolment in higher education has risen dramatically in Latin America, especially in Chile. Yet graduation and persistence rates remain low. One way to improve graduation and persistence is to use data and analytics to identify students at risk of dropout, target interventions, and evaluate interventions’ effectiveness at improving student success. We illustrate the potential of this approach using data from eight Chilean universities. Results show that data available at matriculation are only weakly predictive of persistence, while prediction improves dramatically once data on university grades become available. Some predictors of persistence are under policy control. Financial aid predicts higher persistence, and being denied a first-choice major predicts lower persistence. Student success programmes are ineffective at some universities; they are more effective at others, but when effective they often fail to target the highest risk students. Universities should use data regularly and systematically to identify high-risk students, target them with interventions, and evaluate those interventions’ effectiveness.

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Publicaciones

Does Achievement Rise Fastest with School Choice,School Resources, or Family Resources? Chile from 2002 to 2013.

alvarohofflinger

Álvaro Hofflinger & Paul T. von Hippel

Abstract

Debates in education policy draw on different theories about how to raise children’s achievement. The school competition theory holds that achievement rises when students can choose among competing schools. The school resources theory holds that achievement rises with schools’ resources per student. The family resources theory holds that achievement rises as parents become more educated and earn higher incomes. We test all three theories in Chile between 2002 and 2013, when reading and math scores rose by 0.2 to 0.3 standard deviations, as school competition, school resources, and family resources all increased. We compare Chilean municipalities in a difference-in-differences analysis, asking whether test scores rose fastest in municipalities with greater increases in school competition, school resources, or family resources. We find that municipal test scores did not rise with school competition but did rise with family resources (parental education, not income) and, to a smaller extent, with school resources (as measured by class sizes). Results favor the family resource theory, and to a lesser extent the school resource theory, but not the school competition theory.

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Publicaciones

Missing Children: How Chilean Schools Evaded Accountably by Having Low-Performing Students Miss High-Stakes Test.

alvarohofflinger

Álvaro Hofflinger & Paul T. von Hippel

Abstract

High-stakes testing pressures schools to raise test scores, but schools respond to pressure in different ways. Some responses produce real, broad increases in learning, but other responses can raise reported test scores without increasing learning. We estimate the effect of an accountability program on reading scores and math scores in Chile. Over a 6-year period, fourth-grade reading and math scores rose by 0.2 to 0.3 standard deviations, on average, and half the rise was due to the accountability program. However, many schools, especially schools serving disadvantaged students, inflated their accountability ratings by having low-performing students miss high-stakes tests. To encourage healthier responses to accountability, we recommend setting accountability goals that are attainable for schools with disadvantaged students, and providing incentives for all students to take high-stakes tests.

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Publicaciones

COVID-19 and Indigenous Peoples in Chile: Vulnerability to Contagion and Mortality.

alvarohofflinger

Pablo Millalén, Hector Nahuelpán, Álvaro Hofflinger & Edgars Martínez

Abstract

This research investigates whether Indigenous Populations are disproportionately vulnerable to COVID-19 infection and deaths in Chile. To answer this question, we use a regression model to analyze data from the Chilean government. Our analysis indicates that municipalities with a higher proportion of Indigenous people evinced higher rates of infection and deaths to COVID-19. Indigenous groups were not only highly affected at the beginning of the coronavirus outbreak; their rate of infection and mortality has increased as the virus has spread to the general population. We argue that the COVID-19 pandemic can have devastating effects on Indigenous communities, mainly because it increases the historically accumulated inequalities and structural racism linked to colonization, neoliberalism, and neo-extractivism in Chile.

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Publicaciones

Energy Poverty Influences Urban Outdoor Air Pollution Levels During COVID-19 Lockdown in South-Central Chile.

alvarohofflinger

Aner Martínez-Soto, Constanza C. Avendaño Vera, Àlex Boso, Álvaro Hofflinger & Matthew Shupler

Abstract

The effect of COVID-19 lockdowns on ambient air pollution levels in urban south-central Chile, where outdoor air pollution primarily originates indoors from wood burning for heating, may differ from trends in cities where transportation and industrial emission sources dominate. This quasi experimental study compared hourly fine (PM2.5) and coarse (PM10) particulate matter measurements from six air monitors (three beta attenuation monitors; three low-cost sensors) in commercial and low/middle-income residential areas of Temuco, Chile between 2019 and 2020. The potential impact of varying annual meterological conditions on air quality was also assessed. During COVID-19 lockdown, average monthly ambient PM2.5 concentrations in a commercial and middle-income residential neighborhood of Temuco were up to 50% higher (from 12 to 18 μg/m3) and 59% higher (from 22 to 35 μg/m3) than 2019 levels, respectively. Conversely, PM2.5 levels decreased by up to 52% (from 43 to 21 μg/m3) in low-income areas. The fine fraction of PM10 in April 2020 was 48% higher than in April 2017–2019 (from 50% to 74%) in a commercial area. These changes did not appear to result from meterological differences between years. During COVID-19 lockdown, higher outdoor PM2.5 pollution from wood heating existed in more affluent areas of Temuco, while PM2.5 concentrations declined among poorer households refraining from wood heating. To reduce air pollution and energy poverty in south-central Chile, affordability of clean heating fuels (e.g. electricity) should be a policy priority.

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Publicaciones

Who Buys Certified Firewood? Individual Determinants of Clean Fuel Adoption for Promoting The Sustainable Energy Transition in Southern Chile.

alvarohofflinger

Boris Álvarez, Àlex Boso, Ignacio Rodríguez, Álvaro Hofflinger & Arturo Vallejos-Romero

Background

Temuco and Padre Las Casas, Chile, have severe problems of air pollution due to the extensive use of firewood for heating. The local authorities have made various efforts to improve fuel quality and introduce greater regulation into the market. Certified firewood guarantees low levels of humidity (< 25%) and has better combustion, but its distribution is still limited and the variables that determine its purchase have scarcely been studied. The aim of this study is to identify the determinants of certified firewood consumption in urban southern Chile.

Methods

This study was conducted with a cross-sectional non-experimental design. Following a non-probability sampling by convenience, we applied 355 surveys to participants who use a firewood system. Nonparametric comparisons analyses were made to identify differences in the use of certified wood by socio demographic variables. In addition, an Ordinal Logistic Regression was used to analyze the relation between the use of certified firewood and various psycho-social variables.

Results

Half of the users of wood-burning stoves participating in the study declared that they “never” (38%) or “almost never” (12%) used certified firewood to heat their home. Situational and product-related variables, such as price, availability, convenience and time are fundamental to people’s purchase behavior, partially explaining the low public interest shown in this product. On the other hand, the results indicate the influence of socio-demographic variables such as income level and the presence of older adults at home, as well as psycho-social variables which include how much participants pay attention to air quality, the information level they have about it, the feelings of discomfort due to air pollution and concern for its effects on health.

Conclusions

First, increasing information levels and awareness among the population through communication campaigns is necessary to promote the sustainable urban energy transition in southern Chile. Second, information strategies may be complemented by boosting employment, driving investment, improving income, and strengthening the mechanisms of social protection, especially for the most vulnerable groups, to be effective. Finally, protecting and stimulating the formal trade in firewood could increase the points of sale of certified firewood, which would facilitate user access to cleaner fuels.

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Publicaciones

Another One Breathes the Dust. The Relation Between Severe Air Pollution Episodes and School Attendance in Southern Chile.

alvarohofflinger

Álvaro Hofflinger & Àlex Boso

The intermediate-sized cities of southern Chile experience days of high pollution levels every winter due to the use of wood-burning stoves. Several studies have analysed the factors that hinder energy transition and the social acceptance of measures to improve air quality, the consequences of which are disturbing. However, they have mainly focused on health issues without considering the social impacts of air pollution. This study aims to assess whether exposure to outdoor air pollution is associated with school absenteeism. We analysed the records of approx. 5,000 students in the fourth grade from 25 schools in five cities in southern Chile (2010–2017). Using a fixed-effects model and applying it to the school level, we were able to estimate the effect of air pollution on absenteeism from school after controlling for the effects of individual characteristics. Previous studies have found that independent of air pollution, students from low-income families have a higher absenteeism rate. Our findings suggest that as air pollution worsens, pupils from middle and high-income households are also more likely to miss school days. We argue that this is, presumably, because high-income families are able to develop protective behaviour such as bringing their children to the doctor or keeping them at home on highly polluted days.

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