Agglomeration Externalities and Technical Efficiency in Pig Production

The objective of the paper is to assess the effects of agglomeration on technical efficiency of French pig farms. We use a two-stage method to evaluate the effects of agglomeration on technical efficiency. The first stage consists in calculating pig activity’s efficiency scores with the non-parametric method Data Envelopment Analysis (DEA). The second stage is a truncated regression of these scores on agglomeration variables. Data are for 899 French pig producers in 2004. Results suggest that these farms were as much affected by positive agglomeration externalities (that are knowledge spillovers due to farms’ density, and also arise from farms’ closeness to downstream market) as any other businesses. There was however no evidence of negative externalities in the form of constraints in farmers’ land demand due to legal disposition relating to manure spreading.Agglomeration, Externalities, Data Envelopment Analysis, Industrial Organization, Livestock Production/Industries,

Modelling the Spatial Structure of Pig Production in Denmark

In Denmark, the concentration of pig production is highest in the western part of the country. However, there may be even larger local differences in the number of pigs produced. In this study we analyze the determinants of the location of pig production in Denmark with particular focus on spatial externalities and the interaction between the location of pig production and upstream sector and slaughterhouses. It is the assumption that the location of slaughterhouses is influenced by the location of the primary producers, implying that this variable is endogenous, whereas the location of primary producers is independent of the location of slaughterhouses. This is due to the fact that transportation costs of pigs are paid by the cooperatives owning the slaughterhouses. This assumption is tested applying a spatial econometric model. The model is estimated for 1999 and 2004. Furthermore, the impact of negative environmental externalities of pig production on location is analyzed. The results show that spatial externalities have a positive effect on the location of pig production whereas environmental regulation has a negative effect on location.Agglomeration, Externalities, Spatial Econometrics, Polluted Production, Livestock Production/Industries,

Why Judges Applying the Daubert Trilogy Need to Know About the Social, Institutional, and Rhetorical - And Not Just the Methodological - aspects of Science

In response to the claim that many judges are deficient in their understanding of scientific methodology, this Article identifies in recent cases (1) a pragmatic perspective on the part of federal appellate judges when they reverse trial judges who tend to idealize science (i.e., who do not appreciate the local and practical goals and limitations of science), and (ii) an educational model of judicial gatekeeping that results in reversal of trial judges who defer to the social authority of science (i.e., who mistake authority for reliability). Next, this Article observes that courts (in the cases it analyzes) are not interested in pragmatically constructing legal science, but rather attempt to ensure that science itself, conceived pragmatically (i.e., without idealizing science), is appropriated in law. This Article concludes that trial judges who fail to appreciate the social, institutional, and rhetorical aspects of science tend to reject reliable—albeit pragmatic—science, welcome unreliable—albeit authoritative— science, and thereby create a body of legal science that is out of sync with mainstream science

Post-Trilogy Science in the Courtroom: What are the Judges Doing?

Not available

A Non-Romantic View of Expert Testimony

The Daubert trilogy as a whole deflects attention away from abstract identifications of scientific validity (including the demarcation controversy aimed at rooting out allegedly junk science from the courtroom), and toward the application of expertise to the particular case at hand. That emphasis on application is reflected as well in post-trilogy scholarship, wherein we see three patterns or contours that both help quiet the debates and provide useful guidance to judges and lawyers. First, there is a pragmatic recognition, in various forms, that the focus should be on how science is being used rather than on science in the abstract. Second, that focus must be accompanied by a modest view of science rather than an idealized version of its capacity to produce knowledge for law. Third, the focus on the application phase of expertise must also be accompanied by a modest view of law itself, including judges, lawyers, juries, and the evidentiary rules. It is far too easy, in the post-trilogy series of debates, to romanticize the power of science, or the virtues of the legal system, or both, and to fail to recognize their practical limitations. Romantic images of science are often bolstered by demonizations of forensic scientists, plaintiff\u27s experts, or social science, just as romantic images of law often rely on demonizations of judges untrained in science, lawyers as overly zealous advocates, or jurors as emotional, uncritical, and confused. Thus the pragmatic emphasis on application needs to be mediated by pragmatic views of science and law. Fortunately, the pragmatic aspects of science and law - which we associate with their local, social, rhetorical, and institutional features - are most visible in the focus on application. Nevertheless, in the heat of debate, the limitations of law and science often recede into the background, which results in undue attention to red herrings as well as unrealistic proposals for reform

Post-Trilogy Science in the Courtroom, Part II: What are the Judges Still Doing?

Not available

A Non-Romantic View of Expert Testimony

The Daubert trilogy as a whole deflects attention away from abstract identifications of scientific validity (including the demarcation controversy aimed at rooting out allegedly junk science from the courtroom), and toward the application of expertise to the particular case at hand. That emphasis on application is reflected as well in post-trilogy scholarship, wherein we see three patterns or contours that both help quiet the debates and provide useful guidance to judges and lawyers. First, there is a pragmatic recognition, in various forms, that the focus should be on how science is being used rather than on science in the abstract. Second, that focus must be accompanied by a modest view of science rather than an idealized version of its capacity to produce knowledge for law. Third, the focus on the application phase of expertise must also be accompanied by a modest view of law itself, including judges, lawyers, juries, and the evidentiary rules. It is far too easy, in the post-trilogy series of debates, to romanticize the power of science, or the virtues of the legal system, or both, and to fail to recognize their practical limitations. Romantic images of science are often bolstered by demonizations of forensic scientists, plaintiff\u27s experts, or social science, just as romantic images of law often rely on demonizations of judges untrained in science, lawyers as overly zealous advocates, or jurors as emotional, uncritical, and confused. Thus the pragmatic emphasis on application needs to be mediated by pragmatic views of science and law. Fortunately, the pragmatic aspects of science and law - which we associate with their local, social, rhetorical, and institutional features - are most visible in the focus on application. Nevertheless, in the heat of debate, the limitations of law and science often recede into the background, which results in undue attention to red herrings as well as unrealistic proposals for reform

On the Early History of Current Algebra

The history of Current Algebra is reviewed up to the appearance of the Adler-Weisberger sum rule. Particular emphasis is given to the role current algebra played for the historical struggle in strong interaction physics of elementary particles between the S-matrix approach based on dispersion relations and field theory. The question whether there are fundamental particles or all hadrons are bound or resonant states of one another played an important role in this struggle and is thus also regarded.Comment: 17 page

On-Farm Food Safety and Environmental Farm Plans: A Conceptual Framework for Identifying and Classifying Benefits and Costs

This series of six reports entitled: "On-Farm Food Safety and Environmental Farm Plans: Identifying and Classifying Benefits and Costs" was initiated soon after the launch of the Agricultural Policy Framework (APF) in 2002. The APF recognized the importance of food safety and environmental concerns for the future growth of the agriculture and Agri-food sector. For this reason, Agriculture and Agri-Food Canada (AAFC) commissioned this series of reports to develop a conceptual framework to strengthen our understanding of the potential benefit and cost implications of On-farm Food Safety (OFFS) and Environmental Farm Plans (EFP) that were key components of the APF. The reports were prepared by a group of academics with extensive knowledge of the agriculture and Agri-food sector and issues related to food safety, traceability and the environment. The first report presents a summary of the findings in the five main reports in the series. The second report presents the conceptual framework that was developed to help identify qualitatively the potential benefits and costs that the various players in the agriculture and agri-food supply chain would face in implementing OFFS and EFP programs. The third report applies this framework to pork, the fourth, to beef, the fifth, to grains and the sixth, to dairy. In general, benefits and costs are divided into both demand and supply side effects. In addition, both public and private costs and benefits are considered, especially since they help indicate where a role for government might be required and where markets are not working as well as they might. Based on these preliminary qualitative assessments, the beef and pork sector have more to gain from HACCP-based OFFS and EFP initiatives, due to their ability to gain market share from marketing their products internationally, while the grains sector already benefits internationally from its high quality reputation and the dairy sector is restricted to produce only for the domestic market. However, more work is required in these areas to validate and quantify costs and benefits.Agribusiness, Agricultural and Food Policy, Environmental Economics and Policy, Food Consumption/Nutrition/Food Safety, Production Economics, Resource /Energy Economics and Policy,