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1.
Am J Ind Med ; 67(7): 636-645, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38770905

RESUMEN

BACKGROUND: Drug mortality risks vary among industries, creating distinctive geographic patterns across US counties. However, less is known about how local labor market structure relates to drug overdose mortality amid the synthetic opioid era in the United States. This study investigates the relationship between industry-specific job composition and drug overdose mortality at the county level while exploring how fentanyl's presence in illicit drug supplies may moderate the relationship. METHODS: Data were derived from the National Center for Health Statistics' Multiple Cause of Death files for the rates of drug overdose mortality of any intent, linked with four other sources on industry-specific job shares, drug supply, and county-level sociodemographic characteristics and opioid prescribing rates from the US Census Bureau, the CDC, and the Drug Enforcement Administration. Negative binomial regression models were employed to examine associations between county industry-specific job composition and drug overdose mortality, with tests for moderating effects of state-level fentanyl seizure rates. RESULTS: Our models indicate negative associations between job shares of manufacturing, retail trade, and educational services industries and drug overdose mortality. Positive associations were found for arts/entertainment/recreation and public administration. State-level fentanyl seizure rates had moderating effects on administrative/support/waste management/remediation (A/S/WM/R) and educational services. CONCLUSION: Counties with a higher concentration of arts/entertainment/recreation and public administration jobs need targeted efforts to mitigate drug-related overdose risks. Additionally, areas with higher concentrations of A/S/WM/R service jobs, particularly where fentanyl seizure rates are higher, may require proactive harm reduction strategies for reducing overdose risks.


Asunto(s)
Sobredosis de Droga , Fentanilo , Humanos , Estados Unidos/epidemiología , Sobredosis de Droga/mortalidad , Fentanilo/envenenamiento , Femenino , Analgésicos Opioides/envenenamiento , Adulto , Industrias/estadística & datos numéricos , Masculino , Empleo/estadística & datos numéricos , Persona de Mediana Edad , Drogas Ilícitas/envenenamiento
2.
Am J Ind Med ; 67(6): 532-538, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38583075

RESUMEN

BACKGROUND: Work-related asthma (WRA), a preventable occupational disease, can result in adverse health outcomes and employment disability, including decreased productivity, lost workdays, and job loss. Early identification of WRA cases and avoidance of further exposures is crucial for optimal management. OBJECTIVE: We estimate WRA prevalence among US workers by selected sociodemographic characteristics, industry, and occupation groups and assess the differences in adverse health outcomes, preventive care, and lost workdays between persons with WRA and those with non-WRA. METHODS: The 2020 National Health Interview Survey (NHIS) data for working adults aged ≥18 years employed in the 12 months before the survey were analyzed. Prevalence, and adjusted prevalence ratios with 95% confidence intervals were estimated using multivariate logistic regression. RESULTS: Of the estimated 170 million US adults working in the past year, 13.0 million (7.6%) had asthma. Among workers with asthma, an estimated 896,000 (6.9%) had WRA. WRA prevalence was highest among males, workers aged ≥55 years, those with no health insurance, those living in the Midwest, and those employed in the accommodation, food, and other services industry, and in production, installation, transportation, and material moving occupations. Workers with WRA were significantly more likely to use preventive medication and rescue inhalers, and to experience adverse health outcomes and lost workdays than workers with non-WRA. CONCLUSION: Early identification of WRA cases, assessment of workplace exposures, and implementation of targeted interventions that consider the hierarchy of controls are critical to preventing future WRA cases and associated adverse health consequences.


Asunto(s)
Asma Ocupacional , Humanos , Masculino , Adulto , Femenino , Persona de Mediana Edad , Estados Unidos/epidemiología , Prevalencia , Adulto Joven , Adolescente , Asma Ocupacional/epidemiología , Encuestas Epidemiológicas , Enfermedades Profesionales/epidemiología , Asma/epidemiología , Modelos Logísticos , Empleo/estadística & datos numéricos , Ocupaciones/estadística & datos numéricos , Anciano , Industrias/estadística & datos numéricos
3.
Am J Ind Med ; 67(6): 539-550, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38606790

RESUMEN

OBJECTIVE: To assess workplace segregation in fatal occupational injury from 1992 to 2017 in North Carolina. METHODS: We calculated occupational fatal injury rates within categories of occupation, industry, race, age, and sex; and estimated expected numbers of fatalities among Black and Hispanic male workers had they experienced the rates of White male workers. We also estimated the contribution of workforce segregation to disparities by estimating the expected number of fatalities among Black and Hispanic male workers had they experienced the industry and occupation patterns of White male workers. We assessed person-years of life-lost, using North Carolina life expectancy estimates. RESULTS: Hispanic workers contributed 32% of their worker-years and experienced 58% of their fatalities in construction. Black workers were most overrepresented in the food manufacturing industry. Hispanic males experienced 2.11 (95% CI: 1.86-2.40) times the mortality rate of White males. The Black-White and Hispanic-White disparities were widest among workers aged 45 and older, and segregation into more dangerous industries and occupations played a substantial role in driving disparities. Hispanic workers who suffered occupational fatalities lost a median 47 life-years, compared to 37 among Black workers and 36 among White workers. CONCLUSIONS: If Hispanic and Black workers experienced the workplace safety of their White counterparts, fatal injury rates would be substantially reduced. Workforce segregation reflects structural racism, which also contributes to mortality disparities. Root causes must be addressed to eliminate disparities.


Asunto(s)
Negro o Afroamericano , Hispánicos o Latinos , Traumatismos Ocupacionales , Población Blanca , Humanos , North Carolina/epidemiología , Masculino , Persona de Mediana Edad , Adulto , Traumatismos Ocupacionales/mortalidad , Hispánicos o Latinos/estadística & datos numéricos , Población Blanca/estadística & datos numéricos , Negro o Afroamericano/estadística & datos numéricos , Lugar de Trabajo/estadística & datos numéricos , Femenino , Segregación Social , Adulto Joven , Ocupaciones/estadística & datos numéricos , Anciano , Accidentes de Trabajo/mortalidad , Accidentes de Trabajo/estadística & datos numéricos , Industrias/estadística & datos numéricos
4.
Eur J Public Health ; 34(3): 550-556, 2024 Jun 07.
Artículo en Inglés | MEDLINE | ID: mdl-38507556

RESUMEN

BACKGROUND: A large-scale industrial fire occurred in Rouen, France, in 2019. This study assessed the health-related quality of life of people exposed to its consequences 1 year later. METHODS: The study population comprised inhabitants of the exposed area and a non-exposed area. A representative sample was randomly selected using a stratified design. Data were collected using a standardized questionnaire to describe fire exposure and to calculate three health-related quality of life scores according to the SF12-v2 scale. After adjustment, descriptive and multivariate analyses were conducted. RESULTS: The sample comprised 4773 participants (response rate 47.7%). In the exposed area, the average mental, physical and overall health scores were 47.5, 52.0 and 73.8 out of 100, respectively. Mean mental and overall health scores were higher in the non-exposed area (49.0 and 76.0, respectively). After adjustment, a lower mental health score was associated with a higher number of perceived types of exposure, reaching -3.72 points [-5.41; -2.04] for five or more different types of perceived exposure. A lower mental health score was associated with soot deposits (-1.04 [-1.70; -0.39]), perceiving odours [(-2.04 [-3.22; -0.86]) up to the day of data collection], and having seen, heard or been awakened by the fire (-1.21 [-1.90; -0.52]). A slightly lower physical health score was associated with soot deposits (-0.57 [-1.07; -0.08]). CONCLUSION: This study highlighted associations between exposure to the consequences of the industrial fire in Rouen and a deterioration of perceived health-related quality of life 1 year later, particularly the mental health dimension.


Asunto(s)
Incendios , Calidad de Vida , Humanos , Francia , Masculino , Femenino , Persona de Mediana Edad , Incendios/estadística & datos numéricos , Encuestas y Cuestionarios , Adulto , Anciano , Industrias/estadística & datos numéricos , Estado de Salud , Exposición a Riesgos Ambientales/estadística & datos numéricos , Exposición a Riesgos Ambientales/efectos adversos , Salud Mental/estadística & datos numéricos
5.
J Natl Cancer Inst ; 116(5): 737-744, 2024 May 08.
Artículo en Inglés | MEDLINE | ID: mdl-38180898

RESUMEN

BACKGROUND: Industrial facilities are not located uniformly across communities in the United States, but how the burden of exposure to carcinogenic air emissions may vary across population characteristics is unclear. We evaluated differences in carcinogenic industrial pollution among major sociodemographic groups in the United States and Puerto Rico. METHODS: We evaluated cross-sectional associations of population characteristics including race and ethnicity, educational attainment, and poverty at the census tract level with point-source industrial emissions of 21 known human carcinogens using regulatory data from the US Environmental Protection Agency. Odds ratios and 95% confidence intervals comparing the highest emissions (tertile or quintile) to the referent group (zero emissions [ie, nonexposed]) for all sociodemographic characteristics were estimated using multinomial, population density-adjusted logistic regression models. RESULTS: In 2018, approximately 7.4 million people lived in census tracts with nearly 12 million pounds of carcinogenic air releases. The odds of tracts having the greatest burden of benzene, 1,3-butadiene, ethylene oxide, formaldehyde, trichloroethylene, and nickel emissions compared with nonexposed were 10%-20% higher for African American populations, whereas White populations were up to 18% less likely to live in tracts with the highest emissions. Among Hispanic and Latino populations, odds were 16%-21% higher for benzene, 1,3-butadiene, and ethylene oxide. Populations experiencing poverty or with less than high school education were associated with up to 51% higher burden, irrespective of race and ethnicity. CONCLUSIONS: Carcinogenic industrial emissions disproportionately impact African American and Hispanic and Latino populations and people with limited education or experiencing poverty thus representing a source of pollution that may contribute to observed cancer disparities.


Asunto(s)
Contaminantes Atmosféricos , Humanos , Estados Unidos/epidemiología , Contaminantes Atmosféricos/análisis , Contaminantes Atmosféricos/efectos adversos , Estudios Transversales , Exposición a Riesgos Ambientales/efectos adversos , Carcinógenos/análisis , Butadienos/análisis , Butadienos/efectos adversos , Benceno/análisis , Contaminación del Aire/efectos adversos , Contaminación del Aire/análisis , Factores Socioeconómicos , Factores Sociodemográficos , Formaldehído/análisis , Formaldehído/efectos adversos , Níquel/análisis , Níquel/efectos adversos , Industrias/estadística & datos numéricos , Puerto Rico/epidemiología
6.
Nature ; 625(7993): 85-91, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38172362

RESUMEN

The world's population increasingly relies on the ocean for food, energy production and global trade1-3, yet human activities at sea are not well quantified4,5. We combine satellite imagery, vessel GPS data and deep-learning models to map industrial vessel activities and offshore energy infrastructure across the world's coastal waters from 2017 to 2021. We find that 72-76% of the world's industrial fishing vessels are not publicly tracked, with much of that fishing taking place around South Asia, Southeast Asia and Africa. We also find that 21-30% of transport and energy vessel activity is missing from public tracking systems. Globally, fishing decreased by 12 ± 1% at the onset of the COVID-19 pandemic in 2020 and had not recovered to pre-pandemic levels by 2021. By contrast, transport and energy vessel activities were relatively unaffected during the same period. Offshore wind is growing rapidly, with most wind turbines confined to small areas of the ocean but surpassing the number of oil structures in 2021. Our map of ocean industrialization reveals changes in some of the most extensive and economically important human activities at sea.


Asunto(s)
Actividades Humanas , Industrias , Océanos y Mares , Imágenes Satelitales , Humanos , COVID-19/epidemiología , Aprendizaje Profundo , Fuentes Generadoras de Energía/estadística & datos numéricos , Abastecimiento de Alimentos/estadística & datos numéricos , Sistemas de Información Geográfica , Mapeo Geográfico , Actividades Humanas/economía , Actividades Humanas/estadística & datos numéricos , Caza/estadística & datos numéricos , Industrias/economía , Industrias/estadística & datos numéricos , Navíos/estadística & datos numéricos , Viento
7.
Orthopedics ; 47(3): 172-178, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38147497

RESUMEN

OBJECTIVE: This study sought to understand trends in industry payments for research awarded to orthopedic surgeons. MATERIALS AND METHODS: The Centers for Medicare & Medicaid Services Open Payments database was queried for the years 2016 to 2021 for industry payments for research. Financial analyses were performed to understand temporal trends and differences by orthopedic subspecialty and principal investigator characteristics such as sex. The threshold for statistical significance was set at .05. RESULTS: A total of 2014 orthopedic surgeons were identified, among whom 542 adult reconstruction (27%) and 460 sports medicine (23%) surgeons were major beneficiaries. Seventy-one female orthopedic surgeons comprised the minority (4%). Total research payments awarded during the study period aggregated to $266,633,592, with adult reconstruction ($88,819,047; 33%) and sports medicine ($57,949,822; 22%) receiving the highest amounts. Total research payments awarded trended upward yearly except for a decline in 2020 that subsequently rebounded (P<.001). Median annual research payment per orthopedic surgeon was $13,375. Median total industry payments per orthopedic surgeon differed between specialties (P <.001), with the highest amounts for adult reconstruction ($44,063) and sports medicine ($34,567) and the lowest amounts for hand ($12,052) and foot and ankle ($19,233). Median total payments did not differ significantly when stratified by sex (P=.276) and region (P=.906). Specialties in which the respective top three companies offered the majority of the research funding were musculoskeletal oncology (90%), pediatric orthopedics (66%), and shoulder and elbow (64%). CONCLUSION: These results can be used as a primer for orthopedic surgeons seeking to leverage industry relationships to fund translational research. [Orthopedics. 2024;47(3):172-178.].


Asunto(s)
Investigación Biomédica , Cirujanos Ortopédicos , Humanos , Estados Unidos , Cirujanos Ortopédicos/economía , Cirujanos Ortopédicos/estadística & datos numéricos , Femenino , Masculino , Investigación Biomédica/economía , Conflicto de Intereses/economía , Ortopedia/economía , Industrias/economía , Industrias/estadística & datos numéricos
8.
Nature ; 626(7998): 327-334, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38109939

RESUMEN

The pulp and paper industry is an important contributor to global greenhouse gas emissions1,2. Country-specific strategies are essential for the industry to achieve net-zero emissions by 2050, given its vast heterogeneities across countries3,4. Here we develop a comprehensive bottom-up assessment of net greenhouse gas emissions of the domestic paper-related sectors for 30 major countries from 1961 to 2019-about 3.2% of global anthropogenic greenhouse gas emissions from the same period5-and explore mitigation strategies through 2,160 scenarios covering key factors. Our results show substantial differences across countries in terms of historical emissions evolution trends and structure. All countries can achieve net-zero emissions for their pulp and paper industry by 2050, with a single measure for most developed countries and several measures for most developing countries. Except for energy-efficiency improvement and energy-system decarbonization, tropical developing countries with abundant forest resources should give priority to sustainable forest management, whereas other developing countries should pay more attention to enhancing methane capture rate and reducing recycling. These insights are crucial for developing net-zero strategies tailored to each country and achieving net-zero emissions by 2050 for the pulp and paper industry.


Asunto(s)
Agricultura Forestal , Efecto Invernadero , Gases de Efecto Invernadero , Industrias , Internacionalidad , Papel , Desarrollo Sostenible , Madera , Efecto Invernadero/prevención & control , Efecto Invernadero/estadística & datos numéricos , Gases de Efecto Invernadero/análisis , Gases de Efecto Invernadero/aislamiento & purificación , Industrias/legislación & jurisprudencia , Industrias/estadística & datos numéricos , Metano/análisis , Metano/aislamiento & purificación , Reciclaje/estadística & datos numéricos , Reciclaje/tendencias , Países Desarrollados , Países en Desarrollo , Bosques , Agricultura Forestal/métodos , Agricultura Forestal/tendencias , Desarrollo Sostenible/tendencias , Clima Tropical
9.
Environ Sci Pollut Res Int ; 30(37): 86790-86803, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37410328

RESUMEN

China's pulp and paper industry (CPPI) has been always the main carbon emission source in recent years. However, the analysis on influencing factors of carbon emissions from this industry is insufficient. To address the issue, the CO2 emissions from CPPI are estimated in the period of 2005-2019, the driving factors of CO2 emissions are investigated by the logarithmic mean Divisia index (LMDI) method, the decoupling state of economic growth and CO2 emissions is determined by Tapio decoupling model, and finally, future CO2 emissions are predicted under four scenarios by the STIRPAT model to explore the potential of carbon peaking. The results show that CPPI exhibits a rapid increase and a fluctuating downward trend in CO2 emissions during the period of 2005-2013 and 2014-2019, respectively. The main promoting and inhibiting factors to the increase of CO2 emission are per capita industrial output value and energy intensity, respectively. There are five decoupling states of CO2 emissions and economic growth during the study period, and the CO2 emissions exhibit a weak decoupling state with the industrial output value growth in most years of the study period. It is very difficult to realize the carbon peaking goal by 2030 under the baseline and fast development scenarios. Therefore, efficient low carbon and strong low-carbon development policies are necessary and urgent for the realization of carbon peaking goal and the sustainable development of CPPI.


Asunto(s)
Contaminación del Aire , Huella de Carbono , Carbono , Desarrollo Económico , Industrias , Papel , Carbono/análisis , Dióxido de Carbono/análisis , China , Desarrollo Económico/estadística & datos numéricos , Industrias/estadística & datos numéricos , Contaminación del Aire/estadística & datos numéricos , Huella de Carbono/estadística & datos numéricos
10.
Ann Epidemiol ; 83: 71-77.e1, 2023 07.
Artículo en Inglés | MEDLINE | ID: mdl-37100100

RESUMEN

PURPOSE: Examine the risk for site-specific incident cancer across representative transport, rescue, and security industries. METHODS: This Danish nationwide register-based study included all 302,789 workers from transport, rescue and security industries in 2001-2015 and 2,230,877 individuals aged 18-64 years from a total sample of the economically active population for comparison. We used Cox models to estimate the hazard ratios (HRs) of incident cancers. We categorized site-specific cancers by using population-attributable fraction (PAF) estimates from the previous literature. RESULTS: During an average follow-up of 13.4 years, 22,116 incident cancer cases were recorded in these industries. Compared with the reference population, the age-adjusted cancer incidence with a high PAF was higher among men in seafaring (HR 1.28; 95% CI 1.14-1.43), and land transport (HR 1.32; 95% CI: 1.26-1.37), and among women in seafaring (HR 1.26; 95% CI: 1.01-1.57), land transport (HR 1.21; 95% CI: 1.12-1.32), aviation (HR 1.22; 95% CI: 1.05-1.41), and police force (HR 1.21; 95% CI: 1.04-1.40). Overall, tobacco and physical inactivity were the most significant risk factors of cancer. CONCLUSIONS: Regardless of considerable disparities in incident cancer attributable to modifiable risk factors across industries, the total incident cancer rate was elevated in all industries in both sexes.


Asunto(s)
Industrias , Neoplasias , Policia , Trabajo de Rescate , Transportes , Adolescente , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven , Dinamarca/epidemiología , Disparidades en el Estado de Salud , Incidencia , Industrias/estadística & datos numéricos , Neoplasias/epidemiología , Sistema de Registros , Estudios Retrospectivos , Factores de Riesgo , Conducta Sedentaria , Fumar Tabaco/efectos adversos , Fumar Tabaco/epidemiología , Transportes/estadística & datos numéricos , Trabajo de Rescate/estadística & datos numéricos , Policia/estadística & datos numéricos
11.
Ind Health ; 61(1): 78-87, 2023 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-35173135

RESUMEN

This study aimed to identify the major industries and jobs with the highest proportion of workers' compensation (WC) claims for COVID-19, characterize COVID-19 WC claims in terms of their demographic properties and disease severity, and identify factors influencing the approval of COVID-19 WC claims as occupational disease. A total of 488 workers who submitted COVID-19-related claims to the Korea Workers' Compensation and Welfare Service (KWCWS) from January 2020 to July 2021 were analyzed. A Fisher's exact test was employed to associate the severity of COVID-19 infection with demographic properties. The highest proportion of all COVID-19 WC claims compensated as occupational disease (N=462) were submitted by healthcare workers (HCW=233, 50%), while only 9% (N=41) of the total originated from manufacturing industries. The 5% (N=26) of the COVID-19 WC claims accepted were evaluated as severe (N=15) and acute respiratory distress syndrome (N=9). A total of 71% (N=329) of the COVID-19 patients compensated (N=462) were from workplaces with infection clusters. A total of 26 WC cases were rejected for various reasons, including unclear infection routes, infection at private gatherings (including within families), no diagnosis, and more. Given our findings, we suggest an official system should be established to detect and compensate more job-associated infectious diseases like COVID-19.


Asunto(s)
COVID-19 , Enfermedades Profesionales , Indemnización para Trabajadores , Humanos , COVID-19/epidemiología , Industrias/estadística & datos numéricos , Enfermedades Profesionales/epidemiología , República de Corea/epidemiología , Indemnización para Trabajadores/estadística & datos numéricos
12.
Environ Sci Pollut Res Int ; 30(34): 81823-81838, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35576035

RESUMEN

Under the guidance of carbon peak and carbon neutral targets, the industrial structure transformation is vital for carbon emissions reduction in China. However, there is a rebound effect of carbon emissions during the industrial structure transformation. Resource dependence and technological progress have significant impacts on industrial structure transformation and its carbon reduction effect. This paper explores how industrial structure transformation under resource dependence causes the rebound effect from a technological progress perspective. The key results indicate that (1) resource dependence distorts the carbon emissions reduction effect of industrial structure transformation; (2) with the development of technology, the industrial structure upgrading under resource dependence could cause an increase on carbon emissions at the beginning, but the increase would be weakened subsequently, displaying a two-stage feature; (3) the industrial structure rationalization under resource dependence reduces carbon emissions at first, but the reduction would be weakened as the technology develops, then industrial structure's rationalization shows an insignificant impact on carbon emissions, and finally reduces carbon emissions again, presenting a four-stage characteristic; (4) environmental protection technology can correct the distortion effect of resource dependence on the industrial structure rationalization and amplify the industrial structure rationalization's reduction effects on carbon emissions; (5) with the development of energy-saving technology, industrial structure rationalization has a paradoxical impact on carbon emissions, the industrial structure rationalization first reduces, then increases, and finally reduces carbon emissions, indicating an inverted "N" relationship. Finally, policy recommendations for carbon emissions reduction are proposed from the perspective of industrial structure transformation and technological progress.


Asunto(s)
Huella de Carbono , Política Ambiental , Tecnología , China , Investigación Empírica , Desarrollo Económico/estadística & datos numéricos , Industrias/estadística & datos numéricos
13.
J Am Vet Med Assoc ; 260(12): 1440-1444, 2022 04 06.
Artículo en Inglés | MEDLINE | ID: mdl-35389879

RESUMEN

Within this article, a graphical discussion of the veterinary industry is constructed and discussed. This viewpoint centers around the 4 main markets that operate in veterinary medicine: the market for veterinary education, the market for veterinarians, the market for animals, and the market for veterinary services. Moreover, how each market within veterinary medicine is interconnected is the important point of the article. The purpose of the article is to provide a mechanism for discussion on how changes in one market will affect other markets. From this view, I argue that the market for veterinary services is completely dependent on the other 3 markets in terms of defining supply, demand, and market equilibrium. The remainder of the article discusses how to use the multimarket graphical model to aid in discussions around policy changes and provides an example. Some concluding remarks about this view on the interconnectedness of markets within the industry are provided. Again, the intended purpose of this viewpoint is to provide a graphical understanding of the multimarket nature of the industry and a way to discuss any proposed changes to a market based on literature that empirically estimates many aspects of these various markets. I highly encourage any proposed changes to the industry be supported by mathematical/statistical modeling, but the graphical model can aid in a conceptual understanding of those same changes.


Asunto(s)
Industrias , Modelos Teóricos , Medicina Veterinaria , Animales , Humanos , Industrias/estadística & datos numéricos , Veterinarios , Medicina Veterinaria/estadística & datos numéricos
14.
PLoS One ; 17(2): e0263185, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35108316

RESUMEN

Discussions about science and engineering postdoctoral researchers focus almost exclusively on academic postdocs and their chances of eventually securing tenure-track faculty positions. Further, biological sciences dominate policy research and published advice for new PhDs regarding postdoctoral employment. Our analysis uses the Survey of Earned Doctorates and Survey of Doctorate Recipients to understand employment implications for physical sciences and engineering (PSE) and life sciences (LS) graduates who took postdoctoral positions in government, industry, and academic sectors. We examine postdoc duration, reasons for staying in a postdoc, movement between sectors, and salary implications. There is considerable movement between employment sectors within the first six years post-PhD. Additionally, postdocs in PSE are shorter, better paid, and more often in nonacademic sectors than postdocs in LS. These results can help science and engineering faculty discuss a broader range of career pathways with doctoral students and help new PhDs make better informed early career decisions.


Asunto(s)
Investigación Biomédica/educación , Selección de Profesión , Empleo , Ingeniería/educación , Disciplinas de las Ciencias Naturales/educación , Investigadores/educación , Academias e Institutos/estadística & datos numéricos , Disciplinas de las Ciencias Biológicas/educación , Educación de Postgrado , Femenino , Gobierno , Humanos , Industrias/estadística & datos numéricos , Masculino , Estados Unidos
15.
PLoS One ; 17(2): e0263655, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35176051

RESUMEN

In the continuous review reorder point, base-stock (s, S) policy, the replenishment order is launched when the inventory position reaches the reorder point, s. It is commonly assumed that the inventory position is exactly equal to the reorder point at the moment the order is launched, when actually it could be lower at that moment. This implies neglecting the possible undershoots at the reorder point, which has a direct impact on the calculation of the expected shortages per replenishment cycle. This article presents a method for an exact calculation of the fill rate (fraction of demand that is immediately satisfied from shelf) which takes explicit account of the existence of undershoots and is applicable to any discrete demand distribution function in a context of lost sales. This method is based on the determination of the stock probability vector at the moment the replenishment order is launched. Furthermore, neglecting the undershoots is shown to lead to an overestimation of the fill rate, particularly when we move farther away from the unitary demand assumption. From a practical point of view, this behaviour involves underestimating the base-stock level, S, when a target fill rate is set for its determination. The method proposed in this paper overcomes these shortcomings.


Asunto(s)
Comercio/estadística & datos numéricos , Industrias/normas , Administración de Línea de Producción/normas , Distribuciones Estadísticas , Humanos , Industrias/estadística & datos numéricos
17.
PLoS One ; 16(11): e0260393, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34843577

RESUMEN

Large cities are more productive and generate more output per person. Using data from the UK on energy demand and waste generation, we show that they are also more energy-efficient. Large cities are therefore greener than small towns. The amount of energy demanded and waste generated per person is decreasing in total output produced, that is, energy demand and waste generation scale sublinearly with output. Our research provides the first direct evidence of green urbanization by calculating the rate at which per capita electricity use and waste decrease with city population. The energy demand elasticity with respect to city output is 83%: as the total output of a city increases by one percent, energy demand increases less than one percent, and the Urban Energy Premium is therefore 17%. The energy premium by source of energy demand is from households (13%), transport (20%), and industry (16%). Similarly, we find that the elasticity of waste generation with respect to city output is 90%. For one percent increase in total city output, there is a less than one percent increase in waste, with an Urban Waste Premium of 10%. Because large cities are energy-efficient ways of generating output, energy efficiency can be improved by encouraging urbanization and thus green living. We perform a counterfactual analysis in a spatial equilibrium model that makes income taxes contingent on city population, which attracts more people to big cities. We find that this pro-urbanization counterfactual not only increases economic output but also lowers energy consumption and waste production in the aggregate.


Asunto(s)
Urbanización , Ciudades , Electricidad , Composición Familiar , Humanos , Industrias/estadística & datos numéricos , Residuos/estadística & datos numéricos
19.
PLoS One ; 16(8): e0254722, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34347821

RESUMEN

Job security can never be taken for granted, especially in times of rapid, widespread and unexpected social and economic change. These changes can force workers to transition to new jobs. This may be because new technologies emerge or production is moved abroad. Perhaps it is a global crisis, such as COVID-19, which shutters industries and displaces labor en masse. Regardless of the impetus, people are faced with the challenge of moving between jobs to find new work. Successful transitions typically occur when workers leverage their existing skills in the new occupation. Here, we propose a novel method to measure the similarity between occupations using their underlying skills. We then build a recommender system for identifying optimal transition pathways between occupations using job advertisements (ads) data and a longitudinal household survey. Our results show that not only can we accurately predict occupational transitions (Accuracy = 76%), but we account for the asymmetric difficulties of moving between jobs (it is easier to move in one direction than the other). We also build an early warning indicator for new technology adoption (showcasing Artificial Intelligence), a major driver of rising job transitions. By using real-time data, our systems can respond to labor demand shifts as they occur (such as those caused by COVID-19). They can be leveraged by policy-makers, educators, and job seekers who are forced to confront the often distressing challenges of finding new jobs.


Asunto(s)
Algoritmos , Empleo , Competencia Profesional , Orientación Vocacional/métodos , Australia/epidemiología , COVID-19/epidemiología , Conjuntos de Datos como Asunto , Demografía , Humanos , Industrias/métodos , Industrias/organización & administración , Industrias/estadística & datos numéricos , Ocupaciones/estadística & datos numéricos , Pandemias , Dinámica Poblacional , Competencia Profesional/estadística & datos numéricos , Orientación Vocacional/organización & administración , Orientación Vocacional/estadística & datos numéricos
20.
PLoS One ; 16(8): e0256157, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34407130

RESUMEN

Subcontractors depend heavily on their prime contractor and thus find it very risky to enter a new business on their own. This study proposes a framework for these subcontractors to develop blue ocean technologies related to their prime contractor. First, the primary technologies predicted to be promising are extracted from the business reports of the prime contractor. Sub-technologies are then selected through a patent-based search using keywords and International Patent Classification codes of the primary technologies. From them, blue ocean technologies are proposed by optimizing the weighted mean of the min-max normalized market value, degree of competition in the technology market, and subcontractors' potential technological capabilities for each sub-technology. This study shows that subcontractors can enhance their technology competitiveness by finding a low-risk blue ocean technology. Our empirical research on the subcontractors of a semiconductor firm identified technological patent fields for them to pursue. From our framework, subcontractors can identify blue ocean technologies by considering their prime contractor's future industrial areas and technologies of interest as well as their own technological capabilities. Furthermore, the prime contractors can gain the synergy effect of technology expansion through cooperation.


Asunto(s)
Comercio/normas , Competencia Económica/tendencias , Industrias/normas , Invenciones/tendencias , Patentes como Asunto , Comercio/métodos , Humanos , Industrias/métodos , Industrias/estadística & datos numéricos
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