Rowing along the computable general equilibrium modelling mainstream

Theoretical, empirical, and technical principles of computable general equilibrium models (CGE models) development have been presented. It is commented how to model the economical processes using this approach. many economists develop the CGE mosels in order to solve the problems of economical forecast. But the resonable criticism of this method is ignored. By analyzing the approaches to CGE models development in the paper it is concluded that the majority of CGE models are not able to describe properly the operation of real economics losing to the method of interindustry forecast. In the recent time the CGE models have been widely used in economics. The presented paper explain why such attractive methods can lose its popularity.     

Value stream mapping in project management: A case study

This article describes the application of value stream mapping to analyze and redesign the way of managing the materials procurement stage of a project. A framework based on integrated definition (IDEF) methodology, the stream analysis approach, activity‐based costing, and discrete event simulation is presented. The stream analysis approach is used to analyze, diagnose, and manage process changes represented using an IDEF model. A dynamic simulation is used to evaluate the impact of the changes considered, to support the analysis of the process, and to model the performance of the proposed process. The overall methodology is demonstrated by applying it to a company whose core business is the design and construction of offshore oil rigs. The company specializes in engineering, procurement, and construction projects and has an annual portfolio of about six projects. Many of these projects have common features in terms of design and components, and they are all also characterized by a short “time to delivery.” For this reason, this study was aimed at assessing the possible effects that the application of new materials management policies could have on reducing both project completion time and the resources required.     

How should Mass attendance be measured? An Italian case study

The validity of measures of Mass attendance has been a matter of controversy for some time in Italy, just as it has in other countries. This study will show that the different survey methods which can be used each have distinct advantages and disadvantages. We will compare the questionnaire and daily diary as measuring devices and try to highlight their main qualities and failings. More specifically, although the large number of up-to-date questionnaire-based surveys carry the benefit of offering a ??richer?? range of information regarding the interviewee??s religious behaviour, they provide data which is excessively approximate on a systematic basis. In comparison, time use studies are less common and much more costly, partly because they usually use a daily diary to record the activities carried out. Although the data they produce is ??scarcer?? in terms of information, it is also much more reliable. Indeed, estimates obtained from comparisons between the two tools highlight significant differences. In addition, synchronic and diachronic comparisons cannot be carried out due to the fact that the distortions introduced by the use of questionnaires are extremely variable over time and depending on the social segments studied (young people/adults, men/women etc.). The conclusion we will draw is that the daily diary is a far more suitable tool for surveying Mass attendance than the questionnaire because of these distortions. Finally, we will show that this conclusion does not depend on the specific survey methods adopted, as comparisons with multination surveys seem to confirm that, at least with regard to Italy, distortion resulting from use of a questionnaire is a general phenomenon.     

The chilling trade effects of antidumping proliferation

Advocates of antidumping (AD) laws downplay their negative effects by arguing that the trade flows that are subject to AD are small and their distortions negligible. But while the adverse effect of AD on product-level trade has long been established, the question remains whether there are trade effects at the aggregate level. The recent proliferation wave of AD laws and their use provides us with a unique policy change to estimate the true trade effects of adopting and enforcing AD laws. For this purpose, we estimate the effect of AD on bilateral trade flows between the “new adopters” of AD laws and their trade partners. Using a gravity model of annual observations (1980-2000) our estimates show that AD has trade chilling effects on aggregate import volumes but the impacts are heterogeneous across sectors. We find that new tough users experience a chilling of their aggregate imports of 14 billion US$ a year (or 5.9%) as a result of AD measures. For some countries like Mexico and India, the dampening effects of AD laws on trade flows are found to substantially offset the increase in trade volumes derived from trade liberalization.     

Design of the optimal feeding policy in an assembly system

This paper describes an innovative and integrated approach to component management optimization within a production/assembly system. In a mixed-models assembly process the handling of parts and components for each work station represents a substantial variable that can greatly affect job duration and efficiency. This paper is strictly related to Assembly to Order/Manufacturing to Order (ATO and MTO) systems, where lead time has to be very short and flexibility is at its maximum level. In Assembly to Order (ATO) or Make to Order (MTO) systems, the production is increasingly getting more customized in response to the demand, thanks to the progresses reached in both manufacturing and information technologies. It is becoming increasingly possible to assemble or make products specifically in response to the requests of either end customers or retailers. As a consequence of such customization, the design of the whole system must take into direct account several elements: parts warehouses location, feeding policies and feeding systems. In some cases the collection of parts and components required picking activities, in other the movement of entire units load.In several instances experts have analyzed the problems about material centralization/decentralization, storage policies and assembly feeding problem in different and independent ways, while the problem needs an integrated approach. While many researches regarding components allocation problems in ATO and MTO systems, did not consider feeding policies, material picking, packing activities and vehicles optimization, this paper cover focuses on filling such gap using an integrated framework that considers both aspects of the problem: the centralization/decentralization of components in order to minimize the total storage costs and the right feeding policies.Feeding problems in assembly lines are some of the most important aspects to consider during the analysis and design of an assembly system, to allow the maximization of efficiency and flexibility. To reach such goals, a multi-factorial analysis has been carried out during this experiment and will validate the introduced framework. An industrial application of the introduced framework is illustrated to explain its real significant production implication.     

Book Notes COPO No. 3 2009 by Lucia A. Reisch

Book Note

Book Notes COPO No. 3 2009 by Lucia A. Reisch     

Phases of economic development and the transitional dynamics of an innovation-education growth model

This paper extends earlier analysis of the transitional dynamics of a growth model in which both human capital and innovation drive income expansion. Funke and Strulik [2000. On endogenous growth with physical capital, human capital and product variety. European Economic Review 44, 491-515] suggest that the typical advanced economy follows three development phases, characterized in a temporal order by physical capital accumulation, human capital formation, and innovation, and that the transitional dynamics of the model reproduce such a sequencing. I argue that other sequences of the phases of development are possible and show that the model can generate a trajectory in which innovation precedes human capital formation. This trajectory accords with the observation that the rise in formal education followed with a considerable lag the process of industrialization. U.S. income and educational time series data are used to corroborate the innovation-education trajectory.     

Wealth and Income Inequality in Europe

While it has long been apparent that global levels of wealth and income inequality have been steadily increasing since the 1970s, the issue received scant attention in Europe until the recent fi nancial crisis and the resulting Great Recession illuminated for the general public just how great the chasm between the very rich and everybody else had grown. This realisation was coupled with an increased focus on inequality among economists and other academics, leading to a fresh drive for policy ideas to remedy the alarming trend. This Forum comprises a diverse range of viewpoints on the recent history and dynamics of inequality within Europe, each striving to defi ne the root causes in the various countries being examined. The defi nition of these causes, of course, can inform the direction of policies aimed at alleviating the growing inequality in many European countries and thereby curtail one of the major political and social issues of our time.     

Willingness-to-Pay for Multiple Units of Eco-Friendly Wheat-Derived Products: Results From Open-Ended Choice Experiments

A non-hypothetical open-ended choice experiment with a multi-unit elicitation format was conducted to elicit Italian consumer willingness-to-pay (WTP) and demand schedule for new wheat-derived products that were produced by adopting an ecologically friendly post-harvest technique (high heat-treated, HHT). A sample of 270 Italian consumers were surveyed in Bologna, Catania, and Palermo in June 2014. Data were analyzed using a double hurdle model. Results suggest Italian consumers are willing to pay premium prices for HHT flour, while they prefer to pay for HHT packed bread at the same price as a conventional one. Consumers’ WTP for the second, third, and more units are lower than their WTP for the first unit of product. While factors that influence consumers’ decision to buy these two new products are the same, factors that affect their desired product units differ among each products. In conclusion, Italian consumers’ preference for an eco-friendly label depends on the types of products.     

Lead time reduction through ICT application in the footwear industry: A case study

This paper analyses some relevant supply chain management issues for Italian firms operating in the footwear industry. The analysis is carried out on representative firms, located in a specialized regional district with a high density of shoe manufacturing companies. Companies were experiencing substantial problems in the management of supplier relationships, as well as in the commercial/distributive channel. Specifically, synchronization issues in the logistics pipeline were weakening firms’ lead time performances.The case study presented strives to highlight the critical points in the set up of the supply chain management programme, as well as the main results obtained. The case study also shows that the adoption of tailored Information and Communication Technology (ICT) tools has the potential to save significant lead time in supplier/buyer relationships. From the case study, generalities can be drawn and transferred to the footwear industry.