scholarly journals On subcopula estimation for discrete models

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Santi Tasena
Keyword(s):  
Weak Convergence ◽  
Design Methodology ◽  
Distribution Functions ◽  
Discrete Models ◽  
Marginal Distributions ◽  
Content Type ◽  
Discrete Random Variables ◽  
Unit Hypercube ◽  
Equivalent Properties ◽  
First Time

PurposeTo discuss subcopula estimation for discrete models.Design/methodology/approachThe convergence of estimators is considered under the weak convergence of distribution functions and its equivalent properties known in prior works.FindingsThe domain of the true subcopula associated with discrete random variables is found to be discrete on the interior of the unit hypercube. The construction of an estimator in which their domains have the same form as that of the true subcopula is provided, in case, the marginal distributions are binomial.Originality/valueTo the best of our knowledge, this is the first time such an estimator is defined and proved to be converged to the true subcopula.

Interest rate option hedging portfolios without bank account

2019 ◽  
Vol 37 (1) ◽  
pp. 134-142
Author(s):  
Alberto Bueno-Guerrero
Keyword(s):  
Design Methodology ◽  
Contingent Claim ◽  
Necessary And Sufficient Condition ◽  
Barrier Option ◽  
Bank Account ◽  
Content Type ◽  
Option Hedging ◽  
Hedging Portfolio ◽  
Necessary And Sufficient ◽  
First Time

Purpose This paper aims to study the conditions for the hedging portfolio of any contingent claim on bonds to have no bank account part. Design/methodology/approach Hedging and Malliavin calculus techniques recently developed under a stochastic string framework are applied. Findings A necessary and sufficient condition for the hedging portfolio to have no bank account part is found. This condition is applied to a barrier option, and an example of a contingent claim whose hedging portfolio has a bank account part different from zero is provided. Originality/value To the best of the authors’ knowledge, this is the first time that this issue has been addressed in the literature.

The carmine dilemma: does the natural colourant preference outweigh nausea?

2018 ◽  
Vol 120 (8) ◽  
pp. 1915-1928
Author(s):  
Judith Müller-Maatsch ◽  
Johannes Jasny ◽  
Katharina Henn ◽  
Claudia Gras ◽  
Reinhold Carle
Keyword(s):  
Design Methodology ◽  
Consumer Perception ◽  
Natural Food ◽  
German Population ◽  
Misleading Information ◽  
Content Type ◽  
Broad Cross Section ◽  
First Time ◽  
Self Administered Questionnaire ◽  
Insight Into

Purpose The purpose of this paper is to provide insight into the consumers’ perception of natural and artificial food colourants. Furthermore, attitudes towards the application of carmine, being technically important and ubiquitously used to impart red shades, are assessed and analysed. Originating from insects, carmine is considered as natural but may arouse disgust. Design/methodology/approach In total, 625 individuals were surveyed using an online, self-administered questionnaire to represent a broad cross-section of the German population. Findings Independent of their origin, the application of colourants was rejected by 57.0 per cent of the interviewees. In total, 31.8 per cent of the participants stated a neutral attitude, while only 11.2 per cent expressed a positive notion. Most respondents preferred colourants from natural sources to artificial ones. While consumers perceive natural food colourants composed of genuine plant pigments positively, 61.6 per cent of respondents disliked the application of animal-derived colourants, 24.8 per cent of them did neither reject nor like it, and only 13.6 per cent of the interviewees stated a positive attitude towards them. The findings of this paper further indicate consumers’ preference for colourants to be either artificial or plant-derived rather than carmine. Food colourants are being rejected, possibly due to misleading information and confusing labelling. Consequently, information about carmine, including its origin and production, did not increase the aversion to products that are dyed with it, but increased their acceptance. Originality/value This study outlines consumer perception and attitudes towards food colourants. For the first time, the findings of this paper report the effect of revealing information about an additive, which initially aroused disgust, and its influence on consumer perception.

A multi-manned assembly line balancing problem with classified teams: a new approach

2016 ◽  
Vol 36 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Hamid Yilmaz ◽  
Mustafa Yilmaz
Keyword(s):  
Design Methodology ◽  
Assembly Line ◽  
Assembly Line Balancing ◽  
Line Balancing ◽  
Test Problems ◽  
New Approach ◽  
Content Type ◽  
Line Test ◽  
Assembly Line Balancing Problem ◽  
First Time

Purpose – Within team-oriented approaches, tasks are assigned to teams before being assigned to workstations as a reality of industry. So it becomes clear, which workers assemble which tasks. Design/methodology/approach – Team numbers of the assembly line can increase with the number of tasks, but at the same time, due to physical situations of the stations, there will be limitations of maximum working team numbers in a station. For this purpose, heuristic assembly line balancing (ALB) procedure is used and mathematical model is developed for the problem. Findings – Well-known assembly line test problems widely used in the literature are solved to indicate the effectiveness and applicability of the proposed approach in practice. Originality/value – This paper draws attention to ALB problem in which workers have been assigned to teams in advance due to the need for specialized skills or equipment on the line for the first time.

European sources for advertising and marketing history

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jeannette Strickland
Keyword(s):  
Latin America ◽  
Design Methodology ◽  
Western Europe ◽  
Original Study ◽  
Eastern Bloc ◽  
Online Searching ◽  
Content Type ◽  
Marketing History ◽  
The World ◽  
First Time

Purpose This paper aims to build on Fred Beard’s study of the world’s archives to identity historical advertising and marketing ephemera, published in this journal in 2018, by focussing on resources available in Europe to augment his survey. Design/methodology/approach Online searching, supplemented by literature emanating from the business archive sector, led to the identification of 177 repositories or online sites in Europe holding advertising and marketing archives of significance for researchers. These are set out in two accompanying tables. Findings A wide diversity of European archives that are open to researchers is revealed in this paper. Many are the archives of the business themselves, but a number of collecting repositories are also listed, brought together for the first time. Research limitations/implications This paper focusses solely on Europe but does not claim to be comprehensive, as the study was time-limited and readers will, no doubt, know of resources that the author has missed. The findings relate mostly to Western Europe, so there is scope for further study to encompass archives in the former eastern bloc. Exploration of sources in Africa, Asia and Latin America would further supplement Beard’s original study. Originality/value This research brings together the broadest list of advertising and marketing sources open to researchers in Europe published to date. As Beard’s focus was more on the Americas, this examination redresses the balance with an array of European sources which, it is hoped, will contribute to the greater use of many little-known or under-researched resources by researchers across the world.

“Never the first time on a patient”: the stakes of high-fidelity simulation for safety training

2018 ◽  
Vol 32 (5) ◽  
pp. 23-25 ◽  
Author(s):  
Lucie Cuvelier
Keyword(s):  
Case Studies ◽  
Design Methodology ◽  
Reading Time ◽  
Safety Training ◽  
High Fidelity ◽  
High Fidelity Simulation ◽  
Content Type ◽  
Pertinent Information ◽  
First Time ◽  
Practical Implications

Purpose This paper aims to review the latest management developments across the globe and pinpoint practical implications from cutting-edge research and case studies. Design/methodology/approach This briefing is prepared by an independent writer who adds their own impartial comments and places the articles in context. Findings An operative approach is described that is designed to structure the debriefing along three axes. Practical implications The paper provides strategic insights and practical thinking that have influenced some of the world’s leading organizations. Originality/value The briefing saves busy executives and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

Accounting of gross exports and tracing foreign values in the global pharmaceutical value chain

2018 ◽  
Vol 22 (4) ◽  
pp. 348-363
Author(s):  
Chang-soo Lee ◽  
Mikyung Yun
Keyword(s):  
Value Chain ◽  
Decomposition Method ◽  
Design Methodology ◽  
Bilateral Trade ◽  
Value Chains ◽  
Vertical Specialization ◽  
Content Type ◽  
Second Tier ◽  
First Time ◽  
European Regional

Purpose The purpose of this paper is to document for the first time the vertical specialization structure of the global pharmaceutical value chain. Design/methodology/approach The paper adopts Wang et al.’s (2013) gross exports decomposition method to trace foreign values in bilateral trade between major pharmaceutical producers, using the 2014 WIOT database. Findings The paper shows that as in other sectoral value chains, the pharmaceutical value chain is heavily regional. The paper identifies a strong European regional value chain, and a less intensive, Asian regional value chain. Korea is positioned in the middle of the Asian value chain, and is connected to the European regional value chain as a second-tier supplier. Originality/value The paper documents the vertical specialization structure of the global pharmaceutical value chain through gross exports decomposition method, making use of the World Input–Output Table Database 2014 which disaggregates pharmaceuticals in its industry classification for the first time.

Academic use of smartphones by university students: a developing country perspective

2016 ◽  
Vol 34 (4) ◽  
pp. 651-665 ◽  
Author(s):  
Md. Emran Hossain ◽  
S.M. Zabed Ahmed
Keyword(s):  
University Students ◽  
Design Methodology ◽  
Positive Perception ◽  
Academic Variables ◽  
Content Type ◽  
Academic Characteristics ◽  
Place Of Origin ◽  
Smartphone Use ◽  
Parametric Analyses ◽  
First Time

Purpose This paper aims to investigate the use of smartphones for academic purposes by students at Dhaka University, the top-ranked university in Bangladesh. Design/methodology/approach Students currently using smartphones answered a questionnaire survey, which focused on whether or not students used smartphones for academic works and, if so, for what purposes they used them and their opinion on the advantages of using smartphones for academic purposes. Descriptive statistics were used to analyze demographic and academic characteristics of the students in relation to their smartphone usage. Non-parametric analyses were performed using Mann–Whitney and Kruskal–Wallis tests to compare between students’ demographic and academic variables and their opinion on the advantages of academic use of smartphones. Findings The findings indicate that a vast majority of university students used smartphones for academic purposes. They, on average and across the board, had a positive perception toward academic use of smartphones. Although there were some differences in terms of gender, age, place of origin and duration of smartphone use, these differences were largely due to fact that a smartphone is a relatively new addition to the life of most students who participated in this study. Originality/value Research investigating the academic use of smartphones in the perspective of developing countries is virtually non-existent. This is the first time an effort has been made to examine the use of smartphones by a large sample of university students in Bangladesh.

Cooperatives: an alternative to water privatization in Greece

2014 ◽  
Vol 10 (2) ◽  
pp. 135-154 ◽  
Author(s):  
Ifigeneia Douvitsa ◽  
Demosthenis Kassavetis
Keyword(s):  
Design Methodology ◽  
Water Distribution ◽  
Water Privatization ◽  
Negative Effects ◽  
Content Type ◽  
Negative Results ◽  
Viable Solution ◽  
Water Provision ◽  
First Time ◽  
Practical Implications

Purpose – The aim of this article is to investigate the organization of water cooperatives in Greece for the first time, as promoted by a spontaneous social mobilization called Initiative 136. The above attempt appears as an alternative proposition as opposed to the state-driven full privatization of EYATH S.A. Design/methodology/approach – This article presents previous work on water cooperatives and the negative effects of water privatization worldwide, relating it to water privatization in Greek reality through the prism of the current recession. Findings – While full privatization under the pressure of the economic crisis is very likely to yield significantly negative results, a transformation into a water cooperative might provide a viable solution. Research limitations/implications – Water cooperatives provide a solution for water distribution that is friendly for the consumer, the society and the environment. Practical implications – Application of a cooperative method of water provision in Greece could be a springboard for the use of the model in other areas. Originality/value – The article evaluates the privatization and cooperativization attempt of EYATH S.A. based on previous related research and considering Greece ' s current conditions.

Large-cap vs small-cap portfolio performance: new empirical evidence from ETFs

2019 ◽  
Vol 18 (1) ◽  
pp. 71-94
Author(s):  
Gerasimos Rompotis
Keyword(s):  
Design Methodology ◽  
Portfolio Performance ◽  
Exchange Traded Funds ◽  
Investment Strategies ◽  
Time Data ◽  
Content Type ◽  
Risk Characteristics ◽  
The Usa ◽  
First Time ◽  
Practical Implications

PurposeA well-documented pattern in the literature concerns the outperformance of small-cap stocks relative to their larger-cap counterparts. This paper aims to address the “small-cap versus large-cap” issue using for the first time data from the exchange traded funds (ETFs) industry.Design/methodology/approachSeveral raw return and risk-adjusted return metrics are estimated over the period 2012-2016.FindingsResults are partially supportive of the “size effect”. In particular, small-cap ETFs outperform large-cap ETFs in overall raw return terms even though they fail the risk test. However, outperformance is not consistent on an annual basis. When risk-adjusted returns are taken into consideration, small-cap ETFs are inferior to their large-cap counterparts.Research limitations/implicationsThis research only covers the ETF market in the USA. However, given the tremendous growth of ETF markets worldwide, a similar examination of the “small vs large capitalization” issue could be conducted with data from other developed ETF markets in Europe and Asia. In such a case, useful comparisons could be made, so that we could conclude whether the findings of the current study are unique and US-specific or whether they could be generalized across the several international ETF markets.Practical implicationsA possible generalization of the findings would entail that profitable investment strategies could be based on the different performance and risk characteristics of small- and large-cap ETFs.Originality/valueThis is the first study to examine the performance of ETFs investing in large-cap stock indicesvis-à-visthe performance of ETFs tracking indices comprised of small-cap stocks.

Deposition-induced effects of isotactic polypropylene and polycarbonate composites during fused deposition modeling

2017 ◽  
Vol 23 (5) ◽  
pp. 869-880 ◽  
Author(s):  
Ying-Guo Zhou ◽  
Bei Su ◽  
Lih-sheng Turng
Keyword(s):  
Mechanical Properties ◽  
Design Methodology ◽  
Fused Deposition Modeling ◽  
Content Type ◽  
Fused Deposition ◽  
Close Relationship ◽  
Molded Parts ◽  
Deposition Modeling ◽  
Injection Molded ◽  
First Time

Purpose Although the feasibility and effectiveness of the fused deposition modeling (FDM) method have been proposed and developed, studies of applying this technology to various materials are still needed for researching its applicability, especially with regard to polymer blends and composites. The purpose of this paper is to study the deposition-induced effect and the effect of compatibilizers on the mechanical properties of polypropylene and polycarbonate (PP/PC) composites. Design/methodology/approach For this purpose, three different deposition modes for PP/PC composites with or without compatibilizers were used for the FDM method and tested for tensile properties. Also, parts with the same materials were made by injection molding and used for comparison. In addition, different deposition speeds were used to investigate the different deposition-induced effects. Furthermore, the behavior of the mechanical properties was clarified with scanning electron microscope images of the fracture surfaces. Findings The research results suggest that the deposition orientation has a significant influence on the mechanical behavior of PP/PC composite FDM parts. The results also indicate that there is a close relationship between the mechanical properties and morphological structures which are deeply influenced by compatibilization. Compared with injection molded parts, the ductility of the FDM parts can be dramatically improved due to the formation of fibrils and micro-fibrils by the deposition induced during processing. Originality/value This is the first paper to investigate a PP/PC composite FDM process. The results of this paper verified the applicability of PP/PC composites to FDM technology. It is also the first time that the deposition-induced effect during FDM has been investigated and studied.

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