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1 – 10 of 16This paper aims to develop and test a new way of modeling airline operations and apply it to measure and compare the efficiency of international airlines, with a special focus on…
Abstract
This paper aims to develop and test a new way of modeling airline operations and apply it to measure and compare the efficiency of international airlines, with a special focus on deregulation effects. The paper elaborates on the choice of variables, following the early work of Schefczyk (1993) and Scheraga (2004). The value chain of the airlines determines the variables included in three different models. Using data envelopment analysis, the efficiency scores show that North American airlines are more efficient in producing services offered to customers. Few differences are found between regions in allocating service output to match demand. One plausible explanation for this difference is that airlines operate within competitive environments. In a highly competitive market, management decisions focus on productive actions and cost reduction. In a less competitive environment, there is a higher degree of adjustments of the services produced. Using the Malmquist productivity index, measurements reveal that there is a catch-up effect for the European and Asian/South American airlines service production during the studied time period, which was from 1990 to 2003.
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Ghadeer Alabbadi and Rabab Allouzi
The purpose of this study is to improve the lateral capacity of Cold-Formed Steel (CFS) frame walls filled with lightweight foamed concrete (LFC) and supported with straw boards…
Abstract
Purpose
The purpose of this study is to improve the lateral capacity of Cold-Formed Steel (CFS) frame walls filled with lightweight foamed concrete (LFC) and supported with straw boards by introducing structural foamed concrete and/or bracing.
Design/methodology/approach
Finite element models are developed and calibrated based on previous experimental work. Then, these models are extended to conduct a parametric study to quantify the effect of filling CFS walls and structural LFC and the effect of supporting CFS walls with bracing.
Findings
Results of the study conclude that the finite element analysis can be used to simulate and analyze the lateral capacity of CFS walls effectively since the maximum deviation between calibrated and experimental results is 10%. The structural LFC usage in CFS walls improves the lateral capacity considerably by (25–75) % depending on the wall properties. Besides, the application of lateral bracing does not always have a positive effect on the lateral performance of these walls.
Originality/value
Although CFS walls are preferred due to it is light in weight, low in cost, easy to install and recyclable, low seismic performance, buckling vulnerability, poor thermal insulation and sound insulation properties, low lateral stiffness, and low shear strength limit their use. This study proposes the use of structural foamed concrete and a different bracing method than what is available in the literature. This can overcome the drawbacks of the CFS walls alone which can permit the usage of such walls in mid-rise buildings and other applications.
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Indira Mahalingam Carr and Katherine S. Williams
Banking and insurance sectors have witnessed an increased use of computers for transferring all types of information. There is no uniformity in the extent to which different…
Abstract
Banking and insurance sectors have witnessed an increased use of computers for transferring all types of information. There is no uniformity in the extent to which different Member States of the European Community (EC) protect a data subject's right to privacy. The EC has sought to harmonise the disparate laws while trying to maintain a balance between the free flow of information and the individual's right to privacy. This paper considers in brief some of the provisions put forward in the revised draft directive of the Council that are likely to affect the insurance and business industries.
Riccardo Bellofiore and Scott Carter
Resurgent interest in the life and work of the Italian Cambridge economist Piero Sraffa is leading to New Directions in Sraffa Scholarship. This chapter introduces readers to some…
Abstract
Resurgent interest in the life and work of the Italian Cambridge economist Piero Sraffa is leading to New Directions in Sraffa Scholarship. This chapter introduces readers to some of these developments. First and perhaps foremost is the fact that as of September 2016 Sraffa’s archival material has been uploaded onto the website of the Wren Library, Trinity College, Cambridge University, as digital colour images; this chapter introduces readers to the history of these events. This history provides sharp relief on the extant debates over the role of the archival material in leading to the final publication of Production of Commodities by Means of Commodities, and readers are provided a brief sketch of these matters. The varied nature of Sraffa scholarship is demonstrated by the different aspects of Sraffa’s intellectual legacy which are developed and discussed in the various entries of our Symposium. The conclusion is reached that we are on the cusp of an exciting phase change of tremendous potential in Sraffa scholarship.
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Alicia Robb and Robert Seamans
We extend theories of the firm to the entrepreneurial finance setting and argue that R&D-focused start-up firms will have a greater likelihood of financing themselves with equity…
Abstract
We extend theories of the firm to the entrepreneurial finance setting and argue that R&D-focused start-up firms will have a greater likelihood of financing themselves with equity rather than debt. We argue that mechanisms which reduce information asymmetry, including owner work experience and financier reputation, will increase the probability of funding with more debt. We also argue that start-ups that correctly align their financing mix to their R&D focus will perform better than firms that are misaligned. We study these ideas using a large nationally representative dataset on start-up firms in the United States.
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John T. Perry, Gaylen N. Chandler, Xin Yao and James Wolff
Among nascent entrepreneurial ventures, are some types of bootstrapping techniques more successful than others? We compare externally oriented and internally oriented techniques…
Abstract
Among nascent entrepreneurial ventures, are some types of bootstrapping techniques more successful than others? We compare externally oriented and internally oriented techniques with respect to the likelihood of becoming an operational venture; and we compare cash-increasing and cost-decreasing techniques with respect to becoming operational. Using data from the first Panel Study of Entrepreneurial Dynamics, we find evidence suggesting that when bootstrapping a new venture, the percentage of cash-increasing and cost-decreasing externally oriented bootstrapping techniques that a ventureʼs owners use are positive predictors of subsequent positive cash flow (one and two years later). But, internally oriented techniques are not related to subsequent cash flow.
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A suite of databases designed to provide a guide to archive collections, detailed descriptions of some major holdings and surveys of holdings elsewhere, has been developed at the…
Abstract
A suite of databases designed to provide a guide to archive collections, detailed descriptions of some major holdings and surveys of holdings elsewhere, has been developed at the University of Southampton Library since 1983. The databases are mounted using STATUS. Future development paths for archive systems are discussed.
Indunil Erandi Ariyaratne, Anthony Ariyanayagam and Mahen Mahendran
This paper presents the details of a research study on developing composite masonry blocks using two types of mixes, conventional and lightweight mix, to enhance their…
Abstract
Purpose
This paper presents the details of a research study on developing composite masonry blocks using two types of mixes, conventional and lightweight mix, to enhance their fire/bushfire resistance and residual compressive strength.
Design/methodology/approach
Composite masonry blocks (390 × 190 × 90 mm) were fabricated using conventional cement–sand mix as the outer layer and lightweight cement–sand–diatomite mix as the inner layer. Material properties were determined, and all the mixes were proportioned by the absolute volume method. After 28 days of curing, density tests, compression tests before and after fire exposure and fire resistance tests of the developed blocks were conducted, and the results were compared with those of conventional cement–sand and cement–sand–diatomite blocks.
Findings
Developed composite blocks satisfy density and compressive strength requirements for loadbearing lightweight solid masonry units. Fire resistance of the composite block is –/120/120, and no cracks appeared on the ambient side surface of the block after 3 h of fire exposure. Residual strength of the composite block is higher compared to cement–sand and cement–sand–diatomite blocks and satisfies the loadbearing solid masonry unit strength requirements.
Practical implications
Composite block developed in this research can be suggested as a suitable loadbearing lightweight solid masonry block for several applications in buildings in bushfire prone areas.
Originality/value
Limited studies are available for composite masonry blocks in relation to their fire resistance and residual strength.
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Glenn W. Harrison, Morten Igel Lau, Elisabet E. Rutström and Melonie B. Sullivan
We design experiments to jointly elicit risk and time preferences for the adult Danish population. The experimental procedures build on laboratory experiments that have used…
Abstract
We design experiments to jointly elicit risk and time preferences for the adult Danish population. The experimental procedures build on laboratory experiments that have used traditional subject pools. The field experiments utilize field sampling designs that we developed, and procedures that were chosen to be relatively transparent in the field with non-standard subject pools. Our overall design was also intended to be a general template for such field experiments in other countries. We examine the characterization of risk over a wider domain for each subject than previous experiments, allowing more precise estimates of risk attitudes. We also examine individual discount rates over six time horizons, as the first stage in a panel experiment in which we revisit subjects to test consistency and stability of responses over time. Risk and time preferences are heterogeneous, varying by observable individual characteristics. On a methodological level, we implement a refinement of existing procedures which elicits much more precise estimates, and also mitigates framing effects.
Motivated by the concept of procedural utility, which emphasises the salience of process-related job aspects, the purpose of this paper is to addresses three questions: first, “is…
Abstract
Purpose
Motivated by the concept of procedural utility, which emphasises the salience of process-related job aspects, the purpose of this paper is to addresses three questions: first, “is job satisfaction different for the self-employed with no employees and the self-employed with employees?”; second, “is job satisfaction different for managers employed in smaller establishments and managers employed in larger establishments?”; and third, for both the self-employed and those in waged work, is job satisfaction overall correlated with satisfaction with ten identified job aspects’?
Design/methodology/approach
A data set which has its origins in the (UK) 2006 Skills survey is examined, making use of ordinal logit estimations.
Findings
There are differences in job satisfaction between the self-employed with no employees and those with employees, with the latter tending to be more likely to be satisfied. There are differences in job satisfaction between managers in smaller establishment and managers in larger establishments, but not for the three process-related job aspects associated with procedural utility. For the self-employed, there is a predominantly positive and sometimes statistically significant correlation between an individual's job satisfaction overall and satisfaction with the ten job aspects. For the waged worker, there is a uniformly positive and predominantly statistically significant correlation between an individual's job satisfaction overall and satisfaction with the ten job aspects.
Research limitations/implications
The self-employed and those in waged work cannot be assumed to constitute homogeneous groups. Consequently, when future research seeks to examine the manner in which job satisfaction may differ across employment status groups, these groups cannot be treated as mere dichotomous dummy variables.
Originality/value
This is an empirically based reappraisal of hypotheses associated with procedural utility which focuses upon within group differences for two sub-populations in the data set, the self-employed and waged workers.
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