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| Registros recuperados: 23 | |
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| Ando, Amy Whritenour; McConnell, Virginia D.; Harrington, Winston. |
| The Arizona I/M program provides one of the first opportunities to examine the costs and effectiveness of vehicle emission repair. This paper examines various aspects of emission reductions, fuel economy improvements, and costs of repair, drawing data from over 80,000 vehicles failing the I/M test in Arizona between 1995 and the first half of 1996. We summarize the wealth of repair data from the Arizona program and highlight its limitations. Because missing or incomplete cost information has been a serious shortcoming for evaluation of I/M programs, we develop a method for estimating the costs of repair when those costs are not reported. We find surprising evidence that almost one quarter of all vehicles that take the I/M test are never observed to pass... |
| Tipo: Working or Discussion Paper |
Palavras-chave: I/M; Repair; Emissions; Mobile sources; Environmental Economics and Policy; Q25; R48. |
| Ano: 1999 |
URL: http://purl.umn.edu/10915 |
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| Walls, Margaret; Nelson, Peter. |
| In 1999 Congress passed the National Air Quality and Telecommuting Act. This Act established pilot telecommuting programs in five major U.S. metropolitan areas with the express purpose of studying the feasibility of addressing air quality concerns through telecommuting. This study provides the first analysis of data from the "ecommute" program. Using two-and-one-half years of data, we look at telecommuting frequency, mode choice, and emissions reductions. We also look at reporting behavior, dropout rates, and other information to assess the program's performance. We analyze results by city- Denver, Washington, D.C., Houston, Los Angeles, and Philadelphia are the five pilot cities. And finally, we use the program's emissions reduction findings to calculate... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Telecommuting; Mode choice; Air quality; Emissions; Labor and Human Capital; R4; Q53; Q58. |
| Ano: 2004 |
URL: http://purl.umn.edu/10628 |
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| Walls, Margaret; Safirova, Elena. |
| In this paper, we review 20 relatively recent empirical studies of telecommuting, all of which focus on the trip reduction perspective. The studies include earlier ones with smaller datasets, such as some pilot studies of individual employers, and more recent studies based on broader surveys of both telecommuters and nontelecommuters. We focus on the results of the studies with respect to participation and frequency of telecommuting, the effects on vehicle-miles-traveled (VMT) and trips, and in some cases, the impacts on emissions and air quality. Although there does not seem to be a consensus, there is a predominant view that certain factors increase both the likelihood of telecommuting and the frequency of telecommuting. These factors are having children... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Telecommuting; Mode choice; Air quality; Emissions; Labor and Human Capital; R4; Q53; Q58. |
| Ano: 2004 |
URL: http://purl.umn.edu/10492 |
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| Schmidt, Thomas G.; Osterburg, Bernhard. |
| How can we estimate the negative externalities of agriculture at the national level, and attribute these to specific production activities and outputs? The paper presents a method that calculates the mass flow in the whole agricultural sector including inputs from other sectors, and that allows to analyse resource use and emissions, e.g. of greenhouse gases. Data inputs are the German economic accounts for agriculture, farm structural survey and market statistics, as well as environmental statistics. In the framework of the German agricultural sector model RAUMIS, material flows within the agricultural sector are described, as well as inputs from other German sectors and imports. Through a processanalytical approach, all information is integrated and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: SEEA; Input-Output Analysis; Agriculture; Resource use; Trade; Emissions; Carbon footprint; Livestock Production/Industries; Resource /Energy Economics and Policy. |
| Ano: 2010 |
URL: http://purl.umn.edu/91268 |
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| Harrington, Winston; McConnell, Virginia D.. |
| This paper examines the current assignment of liability for in-use vehicle emissions and suggests some alternative policies that may reduce the cost and increase the effectiveness. We first discuss the cost, performance and incentives under current Inspection and Maintenance (I/M) programs, using the recently implemented Arizona "Enhanced I/M" program as an example. These programs were designed to identify and repair vehicles with malfunctioning emission control systems. Since their inception, however, I/M programs have been plagued by transaction costs that have drastically raised the cost of I/M as well as limited its effectiveness. These transaction costs fall into three categories: emission monitoring, repair avoidance, and non-transferability of... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Mobile sources; Emissions; Coase; Liability; I/M; Environmental Economics and Policy; Q25; Q28; R48. |
| Ano: 1999 |
URL: http://purl.umn.edu/10911 |
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| Tarlera,Silvana; Capurro,María Cristina; Irisarri,Pilar; Scavino,Ana Fernández; Cantou,Guillermina; Roel,Alvaro. |
| ABSTRACT Water management impacts both methane (CH4) and nitrous oxide (N2O) emissions from rice paddy fields. Although controlled irrigation is one of the most important tools for reducing CH4emission in rice production systems it can also increase N2O emissions and reduce crop yields. Over three years, CH4 and N2O emissions were measured in a rice field in Uruguay under two different irrigation management systems, using static closed chambers: conventional water management (continuous flooding after 30 days of emergence, CF30); and an alternative system (controlled deficit irrigation allowing for wetting and drying, AWDI). AWDI showed mean cumulative CH4 emission values of 98.4 kg CH4 ha−1, 55 % lower compared to CF30, while no differences in nitrous... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Greenhouse gases; Emissions; Methane; Nitrous oxide; Mitigation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000100043 |
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| Arcidiacono, C.. |
| In this work, the general objective was to give a contribute to the knowledge of breeding environment conditions as regards issues of great interest which concern the protection of animal welfare, healthiness of the breeding environment, the operators’ safety in the workplace and the environmental protection. The objective of this work was to verify the levels of ammonia concentrations in different functional areas of two naturally ventilated semi-open dairy houses in Sicily (Italy), through the measurement of the concentrations of ammonia at different heights from the floor of the breeding environment, also in relation to the main inside microclimatic variables and outside climate conditions. An experimental protocol for measuring ammonia concentration... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Emissions; Animal welfare; Operators’ safety; Naturally ventilated barns. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3077 |
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| Registros recuperados: 23 | |
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