168,610 research outputs found
Are the Determinants of Markup Size Industry-Specific? The Case of Slovenian Manufacturing Firms
No full textThe aim of this paper is to identify factors that affect the pricing policy in Slovenian manufacturing firms in terms of the markup size and, most of all, to explicitly account for the possibility of differences in pricing procedures among manufacturing industries. Accordingly, the analysis of the dynamic panel is carried out on an industry-by-industry basis, allowing the coefficients on the markup determinants to vary across industries. We find that the oligopoly theory of markup determination for the most part holds for the manufacturing sector as a whole, although large variability in markup determinants exists across industries within the Slovenian manufacturing. Our main conclusion is that each industry should be investigated separately in detail in order to assess the precise role of markup factors in the markup-determination process.Industry, Manufacturing, Markup determinants, Slovenia
Differential expression of protein kinase C isozymes and erythroleukemia cell difefrentiation
No full textMental Health Knowledge: Validation of the Portuguese Version of MAKS
No full textTrabalho Final do Mestrado Integrado em Medicina apresentado à Faculdade de MedicinaIntrodução: Em 2010, investigadores do King’s College London desenvolveram e validaram um instrumento psicométrico que avalia o conhecimento em saúde mental - Mental Illness Knowledge Schedule (MAKS). O objetivo do presente estudo é obter e validar a versão portuguesa da MAKS e perceber a relação entre conhecimento em saúde mental e barreiras no acesso aos cuidados de saúde mental.Métodos: A MAKS passou por um processo de tradução-retrotradução, seguido pela distribuição da primeira versão da escala a um grupo teste com patologia psiquiátrica diagnosticada, permitindo finalizar a tradução, que foi aprovada pelos autores da escala. O questionário foi aplicado a 162 doentes com patologia mental. Por fim, foi realizada a análise descritiva, foi avaliada a consistência interna através do coeficiente de Cronbach e a MAKS e a BACE foram correlacionadas através da correlação de Spearman. Também foram relacionadas várias características da amostra com a MAKS, através do Teste U de Mann-Whitney e pelo Teste de Kruskal-Wallis.Resultados: A MAKS apresentou uma média 45,88 ± 5,17 pontos. Obtivemos um de Cronbach de 0,285. A MAKS Total e a Parte I relacionam-se com a BACE (Barriers to Access to Care Evaluation) Não Estigma (p=0,047 e p=0,049, respetivamente) e Não Estigma Instrumental (p=0,008 e p=0,045, respetivamente). As perguntas 2, 3 e 4 relacionam-se com a totalidade da BACE (p=0,009, p=0,041 e p=0,025, respetivamente) e com a BACE Estigma (p=0,018, p=0,038 e p=0,016).Discussão: A MAKS apresentou reduzida consistência interna, o que já era expectável, uma vez que não pretende funcionar como uma escala unidimensional, mas como um instrumento de avaliação de diversas áreas do conhecimento. Foram estabelecidas diversas correlações entre a MAKS e a BACE. As pontuações na MAKS mostraram ser influenciadas por fatores como escolaridade, local de acompanhamento do doente e diagnóstico psiquiátrico, mas não pelo sexo. Conclusão: A MAKS avalia o conhecimento em áreas específicas associadas à doença mental e ao estigma, permitindo-nos perceber quais as principais lacunas de conhecimento da população. Esperamos que este estudo seja uma das bases para a investigação e literacia das várias dimensões do estigma associado à saúde mental e que as conclusões obtidas contribuam para melhor educação e sensibilização para a doença mental em Portugal.Introduction: In 2010, King's College London researchers developed and validated a psychometric instrument that assesses mental health knowledge - Mental Illness Knowledge Schedule (MAKS). The aim of the present study is to obtain and validate the Portuguese version of MAKS and to understand the relationship between knowledge in mental health and barriers to access mental health care.Methods: MAKS went through a process of translation-back-translation, followed by the distribution of the first version of the scale to a test group with diagnosed psychiatric pathology, allowing the translation to be finalized, which was approved by the authors of the scale. The questionnaire was applied to 162 patients with mental pathology. Finally, the descriptive analysis was performed, the internal consistency was evaluated through Cronbach’s alpha coefficient and MAKS and BACE were correlated through the Spearman correlation. Several characteristics of the sample were also related with MAKS through the Mann-Whitney U Test and the Kruskal-Wallis Test.Results: MAKS presented an average of 45.88 ± 5.17 points. We obtained a 0,285 Cronbach’s alpha. MAKS Total and Part I were related to BACE No Stigma (p=0.047 and p=0.049, respectively) and No Instrumental Stigma (p=0.008 and p=0.045, respectively). Questions 2, 3 and 4 were related to the total BACE (p=0.009, p=0.041 and p=0.025, respectively) and to BACE Stigma (p=0.018, p=0.038 and p=0.016).Discussion: MAKS presented reduced internal consistency, which was already expected, since it is not intended to function as a one-dimensional scale, but as an instrument for evaluating several areas of knowledge. Some correlations were established between MAKS and BACE. MAKS scores were shown to be influenced by factors such as schooling, patient follow-up and psychiatric diagnosis, but not by sex.Conclusion: MAKS evaluates knowledge in specific areas associated with mental illness and stigma, allowing us to understand the main knowledge gaps in the population. We hope that this study will be one of the bases for the investigation and literacy of the various dimensions of stigma associated with mental health and that the conclusions obtained contribute to better education and awareness of mental illness in Portugal
Consistent subsets: Computing the Houtman–Maks index in Stata
No full textThe Houtman-Maks index is a measure of the size of a violation of utility-maximizing (that is, rational) behavior. In this article, we introduce the command hmindex, which calculates the Houtman-Maks index for a dataset of prices and observed choices of a consumer. The command is illustrated with an empirical application.</p
Contestability and sunk costs: An analysis of product R&D competition
No full textThe paper shows that Bertrand competition and contestability can be reconciled with sunk costs. When average total costs are constant over a range of output, marginal cost pricing does not conflict with the budget constraint faced by firms. Empirical observations support the notion of constant average total costs. When average total costs are constant, there is no trade-off between dynamic economies and static efficiency. The argument is applied to product R&D competition.industrial organization ;
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Performance evaluation of an electric vehiclein real operating conditions of Quito, Ecuador
No full textThe purpose of this paper is show a novel methodology to implementreal condition tests for electric vehicles and to assess the performance of electricvehicles in reality in Quito, to compare this to the results from the manufacturer’sstandardized tests. Electric vehicles are of particular interest for Ecuador, givenits reliance on the importation of refined fossil fuels to satisfy the energy demandsfrom the transport sector. This study assesses the performance, energy con-sumption, reliability, versatility and running cost of a BYD e6 Electric Vehicle(EV) and the associated Electric Vehicle Supply Equipment (EVSE) in thespecific geographic region of Quito, Ecuador. The test driving cycle was per-formed at different elevations ranging from 1900 to 2850 meters above sea level(m.a.s.l.). All the results were analyzed and compared with respect to the per-formance of conventional internal combustion engine (ICE) powered vehicles.The total energy needed to fully charge a battery was calculated to be 62.3 kWh,which allowed the vehicle to travel a total distance of 225 km. Overall, therunning costs for the e6 under regular use were found to be approximately 50%less than those of conventional internal combustion engine cars
Kebebasan Linear Gondran-Minoux dan Regularitas dalam Aljabar Maks-Plus
No full textAljabar maks-plus merupakan suatu himpunan Rmax = R ∪ {−∞} yang dilengkapi operasi maksimum ⊕ dan penjumlahan ⊗. Himpunan matriks ber- ukuran n × n atas aljabar maks-plus dinotasikan sebagai Rn×n max. Penelitian ini bertujuan untuk membahas mengenai kebebasan linear Gondran-Minoux dan re- gularitas serta menyelidiki hubungan antara matriks reguler kuat dengan matriks Gondran-Minoux reguler. Matriks A ∈ Rn×n max dikatakan reguler kuat jika dan ha- nya jika A permanen kuat. Untuk menentukan nilai permanen pada matriks, perlu dicari permutasi matriks yang memiliki bobot maksimum. Selanjutnya, suatu matriks dikatakan memiliki permanen kuat apabila hanya terdapat sa- tu permutasi yang memiliki bobot maksimum. Matriks A ∈ Rn×n max dikatakan Gondran minoux reguler jika ap(A) ⊆ P+ n atau ap(A) ⊆ P− n . Berdasarkan ha- sil dan pembahasan dapat disimpulkan bahwa setiap matriks yang reguler kuat adalah Gondran-Minoux reguler dan himpunan vektor S dikatakan bebas linear Gondran-Minoux jika S tidak dapat dipartisi menjadi dua subhimpunan saling asing yang membentuk ruang linear
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