1,721,391 research outputs found
Replication Data for: "Can Behavioral Interventions Be Too Salient? Evidence from Traffic Safety Messages"
No full textThis replication package replicates the results in "Can Behavioral Interventions Be Too Salient? Evidence from Traffic Safety Messages" by Jonathan D. Hall and Joshua Madsen. Please see README.html (or README.txt) for more information
Replication code and data for "Can Tolling Help Everyone? Estimating the Aggregate and Distribution Consequences of Congestion Pricing"
No full textThis repository contains the online appendix and replication code and data for "Can Tolling Help Everyone? Estimating the Aggregate and Distribution Consequences of Congestion Pricing". Please see readme.pdf for more details. Also note that "tree view" is much more user friendly then the default "list view".Abstract: Economists have long advocated road pricing as an efficiency-enhancing solution to traffic congestion, yet it has rarely been implemented because it is thought to create losers as well as winners. This paper uses survey and travel time data, combined with a structural model of traffic congestion, to estimate the joint distribution of agent preferences and evaluate the aggregate and distributional effects of road pricing. I find that adding tolls on half of the lanes of a highway yields a Pareto improvement. Further, the social welfare gains from doing so are substantial---up to $1,740 per road user per year
Phenomenological aspects of the E6SSM
No full textThe work in this thesis explores various phenomenological aspects of the E6SSM with a particular focus on the inert neutralino sector of the model and on the dark matter implications. The E6SSM is a string theory inspired supersymmetric extension to the Standard Model with an E6 grand unification group. The model provides a solution to the hierarchy problem of the Standard Model, provides an explanation for neutrino mass, and has automatic gauge anomaly cancellation. The inert neutralino sector of the E6SSM and the dark matter that naturally arises from this sector is studied for the first time. Limits on the parameter space from experimental and cosmological observations relating to the inert neutralino dark matter are explored and the consequences for Higgs boson phenomenology are investigated. In plausible scenarios it is found that the couplings of the lightest inert neutralinos to the SM-like Higgs boson are always rather large. This has major implications for Higgs boson collider phenomenology and leads to large spin-independent LSP-nucleon cross-sections. Because of the latter, scenarios in which E6SSM inert neutralinos account for all of the observed dark matter are now severely challenged by recent dark matter direct detection experiment analyses. In plausible scenarios consistent with observations from both cosmology and LEP the lightest inert neutralino is required to have a mass around half of the Z boson mass if it contributes to cold dark matter and this means that tan(?) cannot be too large. A new variant of the E6SSM called the E6ZS 2 SSM is also presented in which the dark matter scenario is very different to the inert neutralino cold dark matter scenario and in which the presence of supersymmetric massless states in the early universe modifies the expansion rate of the universe prior to Big Bang Nucleosynthesis. The new dark matter scenario is consistent with current observations and the modified expansion rate provides a better explanation of various data than the SM prediction. The prospects for a warm dark matter scenario in the E6SSM are also briefly discusse
Replication Data for: The impact of war exposure and morality: Evidence from the Battle of Mosul
No full textOnline Appendix (.pdf) as well as the dataset (.dta) and do file (.do) to run analyses described in the main text and Online Appendix in Stata
Replication Data and Code for: VancUber: The long-run effect of ride-hailing on public transportation, congestion, and traffic fatalities
No full textThis data and programs replicate tables and figures from "VancUber: The long-run effect of ride-hailing on public transportation, congestion, and traffic fatalities" by Cairncross, Hall, and Palsson. Please see the ReadMe file for additional details
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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