Why Are Prices Sticky? The Dynamics of Wholesale Gasoline Prices

The menu-cost interpretation of sticky prices implies that the probability of a price change should depend on the past history of prices and fundamentals only through the gap between the current price and the frictionless price. We find that this prediction is broadly consistent with the behavior of 9 Philadelphia gasoline wholesalers. We nevertheless reject the menu-cost model as a literal description of these firms' behavior, arguing instead that price stickiness arises from strategic considerations of how customers and competitors will react to price changes.

In Pursuit of Our Heroine\u27s Biographer : A Study of Narrative Method in Henry James\u27 The Portrait of a Lady & The Ambassadors

Henry James\u27 novels The Portrait of a Lady (1881) and The Ambassadors (1903) are highly psychological; they address the complexities of the human mind, from motives and morals to flaws and potentials. The author is far more concerned with the way his characters\u27 minds respond to events than with the events themselves. If we enjoy reading James it is largely because of the fascinating tensions he creates which give rise to these responses. Whether these tensions arise between characters or between an individual and his or her external circumstances, James sounds the depths of his characters\u27 responses, demanding through the text a close scrutiny of our sense of human interaction and free will. James poignantly confronts the question of social freedom in both works, depicting Isabel Archer in the process of forming herself in The Portrait, and Lambert Strether struggling to reconcile a past identity with the truths of self discovery in The Ambassadors

Attempting to validate the over/under triage matrix at a level I trauma center.

The Optimal Resources Document (ORD) mandates trauma activation based on injury mechanism, physiologic and anatomic criteria and recommends using the over/undertriage matrix (Matrix) to evaluate the appropriateness of trauma team activation. The purpose of this study was to assess the effectiveness of the Matrix method by comparing patients appropriately triaged with those undertriaged. We hypothesized that these two groups are different and Matrix does not discriminate the needs or outcomes of these different groups of patients.Trauma registry data, from 1/2013-12/2015, at a Level I trauma center were reviewed. Over and undertriage rates were calculated by Matrix. Patients with ISS ≥16 were classified by activation level (full, limited, consultation), and triage category by Matrix. Patients in the limited activation and consultation groups were compared to patients with full activation by demographics, injuries, initial vital signs, procedures, delays to procedure, ICU admission, length of stay, and mortality.7031 patients met activation criteria. Compliance with ACS tiered activation criteria was 99%. The Matrix overtriage rate was 45% and undertriage was 24%. Of 2282 patients with an ISS ≥16, 1026 were appropriately triaged (full activation), and 1256 were under triaged. Undertriaged patients had better GCS, blood pressure, and BD than patients with full activation. ICU admission, hospital stays, and mortality were lower in the undertriaged group. The under triaged group required fewer operative interventions with fewer delays to procedure.Despite having an ISS ≥ 16, patients with limited activations were dissimilar to patients with full activation. Level of activation and triage are not equivalent. The ACS-COT full and tiered activation criteria are a robust means to have the appropriate personnel present based on available pre-hospital information. Evaluation of the process of care, regardless of level of activation should be used to evaluate trauma center performance.Level III Therapeutic and Care managementThis is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal

Reflecting on Recurring Failures in IoT Development

As IoT systems are given more responsibility and autonomy, they offer greater benefits, but also carry greater risks. We believe this trend invigorates an old challenge of software engineering: how to develop high-risk software-intensive systems safely and securely under market pressures? As a first step, we conducted a systematic analysis of recent IoT failures to identify engineering challenges. We collected and analyzed 22 news reports and studied the sources, impacts, and repair strategies of failures in IoT systems. We observed failure trends both within and across application domains. We also observed that failure themes have persisted over time. To alleviate these trends, we outline a research agenda toward a Failure-Aware Software Development Life Cycle for IoT development. We propose an encyclopedia of failures and an empirical basis for system postmortems, complemented by appropriate automated tools.Comment: Accepted at the New Ideas and Emerging Results Track (NIER) at The 37th IEEE/ACM International Conference on Automated Software Engineering (ASE 2022

Reflecting on Recurring Failures in IoT Development

As IoT systems are given more responsibility and autonomy, they offer greater benefits, but also carry greater risks. We believe this trend invigorates an old challenge of software engineering: how to develop high-risk software-intensive systems safely and securely under market pressures? As a first step, we conducted a systematic analysis of recent IoT failures to identify engineering challenges. We collected and analyzed 22 news reports and studied the sources, impacts, and repair strategies of failures in IoT systems. We observed failure trends both within and across application domains. We also observed that failure themes have persisted over time. To alleviate these trends, we outline a research agenda toward a Failure-Aware Software Development Life Cycle for IoT development. We propose an encyclopedia of failures and an empirical basis for system postmortems, complemented by appropriate automated tools

Positive views of immigration are linked to more favorable views about welfare among Americans.

Whether immigrants to the US are a negative or positive influence on US society has been the source of much debate in recent years. In new research, James Garand, Ping Xu, and Belinda C. Davis examine the relationship between people’s attitudes towards immigration and welfare. Using election data, they find that those who are in favor of immigration are also more likely to support welfare and greater welfare spending. They write that much of this relationship can be explained by the growing “immigrationalization” of welfare attitudes in recent decades due to demographic change and the growing number of immigrants participating in welfare programs

Current outcomes of blunt open pelvic fractures: how modern advances in trauma care may decrease mortality.

Background:Open pelvic fracture, caused by a blunt mechanism, is an uncommon injury with a high mortality rate. In 2008, evidence-based algorithm for managing pelvic fractures in unstable patients was published by the Western Trauma Association (WTA). The use of massive transfusion protocols has become widespread as has the availability and use of pelvic angiography. The purpose of this study was to evaluate the outcome of open pelvic fractures in association with related advances in trauma care. Methods:A retrospective review was performed, at an American College of Surgeon verified level I trauma center, of patients with blunt open pelvic fractures from January 2010 to April 2016. The WTA algorithm, including massive transfusion protocol, and pelvic angiography were uniformly used. Data collected included injury severity score, demographic data, transfusion requirements, use of pelvic angiography, length of stay, and disposition. Data were compared with a similar study from 2005. Results:During the study period, 1505 patients with pelvic fractures were analyzed; 87 (6%) patients had open pelvic fractures. Of these, 25 were from blunt mechanisms and made up the study population. Patients in both studies had similar injury severity scores, ages, Glasgow Coma Scale, and gender distributions. Use of angiography was higher (44% vs. 16%; P=0.011) and mortality was lower (16% vs. 45%; P=0.014) than in the 2005 study. Conclusions:Changes in trauma care for patients with open blunt pelvic fracture include the use of an evidence-based algorithm, massive transfusion protocols and increased use of angioembolization. Mortality for open pelvic fractures has decreased with these advances. Level of evidence:Level IV

Computer Software for Aquaculture: Descriptions and Evaluations.

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IMMIGRATION ATTITUDES AND SUPPORT FOR THE WELFARE STATE IN THE AMERICAN MASS PUBLIC

In this article, we explore the relationship between Americans’ attitudes toward immigrants and immigration and their attitudes toward welfare. Using data from the Cumulative American National Election Study from 1992 to 2012, we find ample evidence of the influence of immigration attitudes on both individuals’ attitudes toward welfare recipients and their attitudes toward increased welfare spending. These immigration effects persist even in the face of statistical controls for attitudes toward African Americans and attitudes toward the poor; indeed, in our models, the magnitude of the effects of immigration attitudes surpasses the magnitude of effects of attitudes toward blacks. Further, our findings of immigration effects withstand a range of robustness tests. Our results point to the possible “immigrationalization” of Americans’ welfare attitudes and provide strong evidence that how Americans think about immigration and immigrants is a major factor in how they think about welfare