Search results for "efficiency"
showing 10 items of 1430 documents
Efficient Port Pricing: A New Methodology Applied to Spanish Commercial Ports
2000
This paper presents a methodology for determining efficient tariffs for the services provided by commercial ports. With this method, efficient unit profits can be obtained for the services offered and their margins of sensitivity can be found. This allows port authorities to determine what actions should be taken with regard to tariffs and/or variable costs in order to optimise their economic results. At the same time, shadow prices of port resources and their limits of sensitivity can be obtained, thus providing port authorities with orientation regarding which resources should be augmented and by how much. In the early 90's, this methodology was applied to all Spanish commercial ports and…
Disentangling Tax Evasion from Inefficiency in Firms Tax Declaration: An Integrated Approach
2019
In this article we present a new methodology to support fiscal monitoring by the Italian Revenue Agency (IRA) with the aim of improving current taxpayers fiscal compliance and fighting tax evasion within small and medium enterprises. In fact, given the methodology behind the Sector Studies (Studi di Settore - SdS) system, there is room for firms to implement tax evasion strategies by simply adjusting revenues (and costs) toward an estimated average threshold (known ex-ante), the so called "presumptive" revenues, and achieving the fiscal "congruity" status. By estimating a production function through stochastic frontier analysis we avoid estimating the average threshold know ex-ante and can …
Cost and profit efficiency in the Spanish banking sector (1985–1996): a non-parametric approach
2003
The aim of this article is to analyse the efficiency in costs and in profits of the Spanish banking sector (SBS) in the period 1985–1996 using a non-parametric approach. The results obtained show the existence of profit efficiency levels well below those corresponding to cost efficiency, alternative profit efficiency being below standard profit efficiency. These results imply the existence of market power in the setting of prices and/or the existence of differences in the quality of bank output reflected in the differences in prices. With regard to the immediate future, of full economic and monetary integration, the reduction of profit levels associated with higher competitive pressure may …
Pathways of Innovation: The I-District Effect Revisited
2018
The I-district effect establishes the existence of dynamic efficiency in Marshallian industrial districts in the form of a positive innovative differential comparing to the average of the economy. The hypothesis has been empirically validated for the case of technological innovation using patent indicators. Empirical research has assumed that all types of patentable figures (utility models, national patents, EPO, WIPO) have the same weight regardless of its actual or expected market value, which may be questionable given the differences in coverage, protection and cost of each figure. In this article, we question the existence of the I-district effect when each patent is weighted by its exp…
Culture at work: how culture affects workplace behaviors
2014
Purpose – The purpose of this paper is to give structure to the argument that “culture matters.” Further, the aim is to show how cultural differences shape the use of incentives within firms and point toward culturally affected degrees of efficiency. Design/methodology/approach – The paper incorporates differences in the evaluation of the stimuli money, order, and monitoring into a simple efficiency wage model. Profit maximizing firms are assumed. Findings – It is found that the use of incentives should respect the cultural surrounding. Data from a real-world analysis can partly be explained with this model, which was not done before. Research limitations/implications – The major limitation…
A DEA-based transport heliports' efficiencies evaluation
2015
Purpose - The purpose of the study is the evaluation of the efficiencies of a group of small Italian airports and the comparison with a set of transport heliports to show the difference in the productivity of the two types of infrastructures. Design/methodology/approach - The methodology used for the evaluation is the data envelopment analysis (DEA). Findings - The better performance of the heliports compared to the small inefficient airports. Research limitations/implications - This research is limited by the field of application and the weaknesses of the DEA methodology. However, it could be the first step for further works that will include more accurate models. Practical implications - …
Autonomous artificial nanomotor powered by sunlight
2006
Light excitation powers the reversible shuttling movement of the ring component of a rotaxane between two stations located at a 1.3-nm distance on its dumbbell-shaped component. The photoinduced shuttling movement, which occurs in solution, is based on a “four-stroke” synchronized sequence of electronic and nuclear processes. At room temperature the deactivation time of the high-energy charge-transfer state obtained by light excitation is ≈10 μs, and the time period required for the ring-displacement process is on the order of 100 μs. The rotaxane behaves as an autonomous linear motor and operates with a quantum efficiency up to ≈12%. The investigated system is a unique example of an artif…
Recursive Selective Harmonic Elimination for Multilevel Inverters: Mathematical Formulation and Experimental Validation
2023
A recursive method that eliminates +1 harmonics and their respective multiples from the output voltage of a cascaded H-bridge multilevel inverters with = 2 dc sources ( = 1, 2, 3,...) is proposed. It solves 2×2 linear systems with not singular matrices and always gives an exact solution with very low computational effort. Simulated results in three-phase five, nine, seventeen and thirty three level CHB inverters, and experimental results in five-level inverter demonstrate the validity of the method.
"Table 14" of "Search for magnetic monopoles and stable high-electric-charge objects in 13 TeV proton-proton collisions with the ATLAS detector"
2019
Selection efficiency as a function of transverse kinetic energy $E^\text{kin}_\text{T}=E_\text{kin}\sin\theta$ and pseudorapidity $|\eta|$ for $g=2g_\textrm{D}$ monopoles of mass 500 GeV.
"Table 19" of "Search for magnetic monopoles and stable high-electric-charge objects in 13 TeV proton-proton collisions with the ATLAS detector"
2019
Selection efficiency as a function of transverse kinetic energy $E^\text{kin}_\text{T}=E_\text{kin}\sin\theta$ and pseudorapidity $|\eta|$ for $g=2g_\textrm{D}$ monopoles of mass 3000 GeV.