scholarly journals Implementing quantile selection models in Stata

2021 ◽  
Vol 21 (4) ◽  
pp. 952-971
Author(s):  
Ercio Muñoz ◽  
Mariel Siravegna
Keyword(s):  
Sample Selection ◽  
Quantile Regressions ◽  
One Dimensional ◽  
The United Kingdom ◽  
Base Reference ◽  
Frank Copula ◽  
Males And Females ◽  
Using Data ◽  
Selection Correction ◽  
Reference Manual

In this article, we describe qregsel, a community-contributed command that implements a copula-based sample-selection correction for quantile regression recently proposed by Arellano and Bonhomme (2017, Econometrica 85: 1–28). The command allows the user to model selection in quantile regressions by using either a Gaussian or a one-dimensional Frank copula. We illustrate the use of qregsel with two examples. First, we apply the method to the fictional dataset used in the Stata Base Reference Manual for the heckman command. Second, we replicate part of the empirical application of the original article using data for the United Kingdom that cover the period 1978–2000 to compare wages of males and females at different quantiles.

Morphometric variability in round goby Neogobius melanostomus (Perciformes: Gobiidae) from the Sea of Azov

2017 ◽  
Vol 26 (2) ◽  
pp. 392-405 ◽  
Author(s):  
O.A. Diripasko ◽  
T.A. Zabroda
Keyword(s):  
Round Goby ◽  
Joint Effect ◽  
Neogobius Melanostomus ◽  
Sea Of Azov ◽  
Morphometric Characters ◽  
One Dimensional ◽  
The Sea Of Azov ◽  
Size Dependent ◽  
Size Variability ◽  
Males And Females

A total of 38 morphometric characters of the round goby Neogobius melanostomus melanostomus (Pallas, 1814) were studied in its native range in the Sea of Azov. The aim was to assess joint effect of sexual dimorphism and size variability on overall variability within groups of samples (populations) using appropriate methods of traditional statistical analysis (one-dimensional and multivariate statistics). Sex and size-dependent variability was studied based on model samples of males and females of different size. Most of the studied morphometric characters of round goby from the Sea of Azov demonstrated statistically significant sex- and size-dependent in-group variability. The pattern of the variability suggests that, for a comparison of round goby from different sea regions and between populations, separate samples of males and females within the range 9–13 cm SL should be examined in order to minimise the effect of the size and sex factors. The approach of searching for the most informative size range could be useful not only for further studies of infraspecific variation but for comparisons between morphologically close gobiin species.

scholarly journals The Authoritarian Dynamic During the COVID-19 Pandemic: Effects on Nationalism and Anti-Immigrant Sentiment

2021 ◽  
pp. 194855062097802
Author(s):  
Todd K. Hartman ◽  
Thomas V. A. Stocks ◽  
Ryan McKay ◽  
Jilly Gibson-Miller ◽  
Liat Levita ◽  
...  
Keyword(s):  
Social Order ◽  
Situational Factors ◽  
Right Wing ◽  
Right Wing Authoritarianism ◽  
The United Kingdom ◽  
The Social ◽  
Political Outcomes ◽  
Nationally Representative ◽  
Using Data ◽  
The Relationship

Research has demonstrated that situational factors such as perceived threats to the social order activate latent authoritarianism. The deadly COVID-19 pandemic presents a rare opportunity to test whether existential threat stemming from an indiscriminate virus moderates the relationship between authoritarianism and political attitudes toward the nation and out-groups. Using data from two large nationally representative samples of adults in the United Kingdom ( N = 2,025) and Republic of Ireland ( N = 1,041) collected during the initial phases of strict lockdown measures in both countries, we find that the associations between right-wing authoritarianism (RWA) and (1) nationalism and (2) anti-immigrant attitudes are conditional on levels of perceived threat. As anxiety about the COVID-19 pandemic increases, so too does the effect of RWA on those political outcomes. Thus, it appears that existential threats to humanity from the COVID-19 pandemic moderate expressions of authoritarianism in society.

scholarly journals Exploring the Relationship Between Palatal Cleft Type and Width With the Use of Relieving Incisions in Primary Repair

2021 ◽  
pp. 105566562110196
Author(s):  
Alex Davies ◽  
Amy Davies ◽  
Yvonne Wren ◽  
Scott Deacon ◽  
Alistair R.M. Cobb ◽  
...  
Keyword(s):  
Oral Mucosa ◽  
Primary Repair ◽  
Fistula Formation ◽  
The United Kingdom ◽  
Using Data ◽  
The Uk ◽  
The Relationship ◽  
Soft Edge ◽  
Intravelar Veloplasty ◽  
Pierre Robin

Objective: The mainstay of palatal repair in the United Kingdom is the intravelar veloplasty (IVVP). It is not always possible to align the oral mucosa in the midline to achieve tension-free repair. The addition of lateral relieving incisions may aid transposition of the oral mucosa to allow closure. The aim of this study was to explore cleft features that may predispose to a requirement for relieving incisions in order to allow palate closure. Design: We performed a national multiinstitutional retrospective study using data from the UK Cleft Collective cohort study. Patients: The study sample consisted of 474 patients who had undergone IVVP at the time of palatal closure across all 16 of the UK cleft units. Results: We found strong evidence for the requirement for relieving incisions in patients with an increased degree of clefting per the Veau classification ( P < .001), increasing palatal soft-edge width ( P < .001) and moderate evidence of an associated use in patients with Pierre Robin sequence ( P = .015). Insufficient data were available to explore the relationship between intertuberosity distance and the presence of fistula formation with the use of relieving incisions. Conclusions: The results of this study identify cleft features that increase the likelihood for requiring lateral relieving incisions to allow palatal closure. The degree to which the addition of relieving incisions to IVVP affects maxillary growth and speech outcomes is unknown. Further study is required to answer this important question.

scholarly journals Outcomes of head and neck cancer management from two cancer centres in Southern and Northern Europe during the first wave of COVID-19

2021 ◽  
pp. 030089162110079
Author(s):  
Marta Tagliabue ◽  
Beth Russell ◽  
Charlotte Moss ◽  
Rita De Berardinis ◽  
Francesco Chu ◽  
...  
Keyword(s):  
Head And Neck Cancer ◽  
Head And Neck ◽  
Neck Cancer ◽  
Ace Inhibitors ◽  
Northern Europe ◽  
Nasopharyngeal Swab ◽  
Cancer Management ◽  
The United Kingdom ◽  
Tertiary Hospitals ◽  
Using Data

Objective: To describe the approach and outcomes from two cancer centres in Southern and Northern Europe during the first wave of coronavirus disease 2019 (COVID-19) of patients with head and neck cancer (HNC). Methods: Data collection was performed on a retrospective cohort of patients surgically treated for primary HNC between March and May 2020, using data from two tertiary hospitals: the European Institute of Oncology (Milan) and Guy’s & St Thomas’ NHS Foundation Trust (London). Results: We included 77 patients with HNC. More patients with COVID-19 were taking angiotensin-converting enzyme (ACE) inhibitors and had Clavien-Dindo Classification grade I compared to negative patients, respectively (60% vs 22% [ p = 0.058] and 40% vs 8% [ p = 0.025]). Multivariate logistic regression analyses confirmed our data ( p = 0.05 and 0.03, respectively). Sex and age were statistically significantly different ( p = 0.05 and <0.001 respectively), showing more male patients (75% vs 53.66%, respectively) and more elderly patients in Italy than in the United Kingdom (patients aged >63 years: 69.44% vs 29.27%). Conclusions: This study presents a large cohort of patients with HNC with nasopharyngeal swab during the first peak of the COVID-19 pandemic in Europe. Patients with HNC with COVID-19 appeared more likely to develop postsurgical complications and to be taking ACE inhibitors. The preventive measures adopted guaranteed the continuation of therapeutic surgical intervention.

Migration Processes among the Highly Skilled in Europe

1992 ◽  
Vol 26 (2) ◽  
pp. 484-505 ◽  
Author(s):  
John Salt
Keyword(s):  
United Kingdom ◽  
Skilled Workers ◽  
Migration Process ◽  
The United Kingdom ◽  
Highly Skilled ◽  
European Business ◽  
Business Structures ◽  
Using Data ◽  
Corporate Business ◽  
Official Sources

This article seeks to show that the migration process for highly skilled workers in contemporary Europe is part of the structuring of European business. It focuses on the employer's perspective and role in articulating movement, using data from various official sources as well as survey evidence from the United Kingdom. It suggests that the increasing importance of this form of mobility is related to the process of internationalization by large employers and that the particular form of movement is dependent on the evolution of corporate business structures.

scholarly journals Trends in mortality from ill-defined causes among the elderly in Brazil, 1979-2013: ecological study

2016 ◽  
Vol 134 (5) ◽  
pp. 437-445 ◽  
Author(s):  
Davi Félix Martins Junior ◽  
Ridalva Dias Martins Felzemburg ◽  
Acácia Batista Dias ◽  
Tania Maria Costa ◽  
Pedro Nascimento Prates Santos
Keyword(s):  
Ecological Study ◽  
Temporal Trend ◽  
Health Indicators ◽  
The Elderly ◽  
Simple Linear Regression ◽  
Geographical Regions ◽  
Proportional Mortality ◽  
Males And Females ◽  
Using Data ◽  
Health Situation

ABSTRACT CONTEXT AND OBJECTIVE: Mortality measurements are traditionally used as health indicators and are useful in describing a population's health situation through reporting injuries that lead to death. The aim here was to analyze the temporal trend of proportional mortality from ill-defined causes (IDCs) among the elderly in Brazil from 1979 to 2013. DESIGN AND SETTING: Ecological study using data from the Mortality Information System of the Brazilian Ministry of Health. METHODS: The proportional mortality from IDCs among the elderly was calculated for each year of the study series (1979 to 2013) in Brazil, and the data were disaggregated according to sex and to the five geographical regions and states. To analyze time trends, simple linear regression coefficients were calculated. RESULTS: During the study period, there were 2,646,194 deaths from IDCs among the elderly, with a decreasing trend (ß -0.545; confidence interval, CI: -0.616 to -0.475; P < 0.000) for both males and females. This reduction was also observed in the macroregions and states, except for Amapá. The states in the northeastern region reported an average reduction of 80%. CONCLUSIONS: Mortality from IDCs among the elderly has decreased continuously since 1985, but at different rates among the different regions and states. Actions aimed at improving data records on death certificates need to be strengthened in order to continue the trend observed.

scholarly journals Gypsy–Traveller communities in the United Kingdom and the Netherlands: socially and digitally excluded?

2018 ◽  
Vol 42 (5) ◽  
pp. 637-653
Author(s):  
Leanne Townsend ◽  
Koen Salemink ◽  
Claire Denise Wallace
Keyword(s):  
United Kingdom ◽  
The Netherlands ◽  
Digital Communications ◽  
Digital Inclusion ◽  
Left Behind ◽  
The United Kingdom ◽  
Mainstream Society ◽  
Using Data ◽  
Socially Excluded ◽  
The Impact

With the pervasiveness of digitisation communications, those that are left behind are seen as socially excluded. In both academic and policy discourses, it is assumed that digital inclusion as a route into mainstream society is a desirable solution to problems of multiple exclusion and has led to many studies of the digital inclusion/exclusion of ‘hard to reach’ groups. Yet, Gypsy–Travellers, among the most marginalised people in society, have received little attention. Using data from the Netherlands and the United Kingdom, we assess the impact of digital communications on Gypsy–Traveller communities. This article makes a contribution in the following ways: First, we address the theories of ‘fields of inclusion’ to show how exclusion and inclusion work together in different ways; Second, we explore how different policy frameworks in the Netherlands and the United Kingdom shape these possibilities; Third, we document the forms of inclusion that Gypsy–Travellers experience in terms of digital communications; Fourth, we look at how Gypsy–Travellers use digital communications to recreate their own cultures as well as selectively integrate with mainstream society.

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