No description available.

The purpose of this thesis is to focus on some of the different decisions taken by taxi drivers. The three main areas considered are when a taxi driver chooses to work, where they choose to work and having chosen when and where, the strategy employed by the taxi driver. The chapter examining the decision on when a taxi driver chooses to work considers whether drivers are consistent with the neoclassical model of labour supply. Existing literature on taxi drivers has suggested taxi drivers behave in different ways. This thesis finds that taxi drivers respond to earning opportunities and are more likely to work when the earning opportunities are better than usual. The decision on where a taxi driver chooses to look for fares uses an experimental approach, putting subjects in the position of drivers choosing locations in a square grid. The location choice is a two dimensional extension of Hotelling’s model. In this particular experiment, Nash equilibrium is not obtained through minimum nor maximum differentiation and the learning of subjects and subsequent performance improvement is slow. Simulation through agent-based computational economics is used to investigate the different strategies taxi drivers can use. The simulations show that drivers can increase their own earnings and reduce the waiting time of potential customers by adopting a strategy which makes use of all the available information. The simulations also show that the effectiveness of a strategy is dependent on the choices of other drivers. This thesis suggests a different approach to the analysis of the labour supply decisions of taxi drivers and makes some recommendations regarding regulation of taxi services. The experimental and simulation chapters contribute to the literature through making use of these approaches in the context of looking at taxi drivers. The experiment and simulation could also be extended into other areas.

MSc, Development Planning, Faculty of Engineering and the Built Environment, University of the Witwatersrand, 2000

Student Number : 7336898 - MSc (Eng) research report - School of Civil and Environmental Engineering - Faculty of Engineering and the Built Environment / Theme and Context Despite being the source of two of Africa’s greatest rivers, the Nile and the Congo, Rwanda is a water scarce country and 50% of the citizens of the capital, Kigali, do not have access to safe drinking water. Rwanda’s tragic history of violent social upheaval combined with regional macro-economic factors and the effects of globalization have made this tiny country one of the poorest on the African continent. Aim and Objectives of this Study The aim of this report is to establish the value that Rainwater Harvesting holds as a supplementary water source for the city of. To evaluate this potential intervention, the suitability of the climate for the harvesting of rainwater is reviewed as well as the availability of the required resources and the effect that the prevailing social environment may have on an implementation program. The current developments in the practice of Rainwater Harvesting are researched and ways in which Rainwater Harvesting could be utilized are explored as well as the possible impediments that might be encountered. Scope and Methodology Adopted The scope of the report includes: 1. Providing an overview of the country both geographically as well as socially. 2. Establishing the need for alternative water sources by: a. Reviewing the present water supplies for the city particularly with regard to their vulnerability to the rapid environmental degradation being experienced within the country, b. Reviewing the prevailing water/health nexus. 3. Investigating metrological records, specifically rainfall patterns, and the quality of the statistics. 4. Review international trends and research in rainwater harvesting specifically in poor countries. 5. Considering obstacles to implementing a wide-ranging scheme to harvest rainwater. The methodology adopted includes: 1. Reviewing published research on the subject of Rainwater Harvesting techniques and implementation. 2. Attending symposia on the subject. 3. Meeting with water practitioners both in the public sector as well as in NGOs to establish the current status of water availability, quality and consumption. 4. Conducting on-site research into water sourcing problems in and around Kigali. 5. Designing, sizing and costing hypothetical installations suitable for local conditions. Summary of Main Findings, Conclusions and Recommendations Although the climate and topography are very favorable to the use of Rainwater Harvesting, this report finds that the promotion of Rainwater harvesting is just one of a number of possible interventions which should be pursued in order to improve the availability of water to the citizens of Kigali The cost and sophistication of Rainwater Harvesting schemes vary considerably but at the lower end of the scale the technology would be affordable to most Kigali residents and the community has the potential human resource to be trained to execute the work. Obstacles to this approach include ignorance about the safety of storing water, the comparative low cost of municipal water the perception that water collection is the responsibility of a family’s women and children. This report also found that a household using a Rainwater Harvesting scheme is likely to require some supplementary water on occasions. Furthermore, as the potential to catch sufficient water is a function of the ratio of a dwelling’s roof area to the number of inhabitants, its efficacy is limited in densely inhabited poor communities. Strong leadership and coordination would be necessary for a successful wideranging Rainwater Harvesting implementation project. In addition a coordinated educational programme will have to be conducted to dispel myths about stored water and to create the required skills base. The statutes and bylaws regarding water would also have to be reviewed to avoid legal impediments. This report concludes that rainwater harvesting cannot be relied upon to fulfill all the communities’ water needs but it can go a long way to improving the general access to safe water and in so doing reduce the time and labour presently demanded, mainly of women and children, in the carrying of heavy loads of water.

Digitized by Kansas Correctional Industries

No description available.

The strategic importance of FMCG SME's supply chains makes it paramount that their performances are measured. Performance measurement in the context of on-time delivery is of high importance to SME's. SME's compete with large companies within the FMCG sector, as such gaining a competitive advantage is an extremely difficult task for these small and medium companies. There is an everincreasing interest toward the field of supply chain management and much attention has been deemed towards the importance of information sharing in gaining competitive advantage for SMEs. The integration of the chain both internally and externally through information sharing ( visibility) can lead to increase supply chain performance such as on-time delivery, therefore increasing competitive advantage for the SME's. The study aim to develop a conceptual framework and a model to evaluate the impact of visibility tools usage in FMCG SME's. This research highlights some visibility tools such as ERP systems, Sage software that influences the level of information shared among the parties within the SME supply chain. This research examined the potential of information technology based tools and visibility factors and aims to provide factors that may influence the sharing of information between suppliers and customers along the supply chain, thus meeting on time delivery schedules. This research employed both quantitative and qualitative approaches, with regression and correlation tests also conducted. Two questionnaires were administered, one at the case study company, the other at 100 SME's across London, 63 valid questionnaires were received and analyzed using SPSS software (manufactured by IBM, version 20). The findings of this research revealed that having shared values among SME's influenced the level of information that is shared and thus the level of visibility achieved within the supply chain. Further, it was revealed that large companies are able to utilize more in depth IT based systems, while small and medium sized companies had a tendency to utilize informal means for their visibility tools. In addition, the analysis of the research model indicated that supplier lead time and supplier chain reliability greatly influenced the ICT infrastructure of a FMCG SME. The model analysis also indicated that the delivery lead time influenced on-time delivery. In addition supply chain responsiveness was found to explain 30.9% of the variances found in supply chain visibility.

Made available in DSpace on 2014-06-12T17:41:34Z (GMT). No. of bitstreams: 2 arquivo7318_1.pdf: 3907134 bytes, checksum: af97373928b4c23f70471b3cadc5592d (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2002 / O gerenciamento da cadeia logística e suprimentos "supply chain management" significa a integração completa de todos os parceiros e processos de uma cadeia logística. Este tem sido um objetivo perseguido por muitas empresas que buscam aumentar a competitividade diante de mercados cada vez mais concorridos. No entanto, como não há um padrão único a ser seguido, para integrar sua cadeia logística, uma empresa deve antes de tudo mudar a si mesma, passando de organização vertical para horizontal, fazendo com que todas as suas áreas e processos trabalhem de forma sincronizada, aqui surge a maior dificuldade enfrentada atualmente pelas empresas nesse processo. Diante desse quadro, este trabalho demonstra, através de simulação, como a utilização do fluxograma de processo pode contribuir para diagnosticar o estágio atual da cadeia, aperfeiçoar os fluxos de produtos e informações identificando as operações que não agregam valor, bem como as mudanças necessárias para reestruturação das atividades. Dessa forma, evidencia-se como através da análise de micro-processos a empresa pode estabelecer ações para otimizar o caminho crítico, gerar valor na cadeia logística, reduzir custos e aumentar a satisfação dos seus clientes

Doctor of Philosophy / Department of Agricultural Economics / Nathan P. Hendricks / Price changes affect the profitability of agricultural land use at the intensive margin (i.e. crop choice) and the extensive margin (i.e. land devoted to crop production). Understanding how prices impact localized land use decisions is important for predicting how production and its allocation across producers change with prices. Due to its wide expanse and diverse geography, the productivity US land differs across space and uses. Understanding the drivers of land use decisions while accounting for such diversity is essential for accurately modeling supply response at the regional and national level. This dissertation contains two studies that provide insight into how price changes impact land use decisions at the extensive and intensive margins. In the first chapter examine the corn supply-price relationship in the United States. I perform this analysis using field-level data across the contiguous US (CONUS). This study is unique in that it incorporates micro-level data from over 3 million fields to estimate region-specific supply response and then aggregates results to the national level. The dataset used in this study is nearly comprehensive, representing field-level decisions across fields that accounted for over 88% of national corn production between 2009 and 2016. The findings from this study illustrate the importance of incorporating heterogeneity in supply response models. Supply response to price differed substantially across regions with high supply sensitivity in the north-central US and Mississippi River Delta, moderate sensitivity in Corn Belt states, andlow sensitivity in the western and Gulf Coast states. The relative importance of corn production in the in the Corn Belt states of Iowa, Illinois, Indiana, and Nebraska meant that it was far less sensitive and, in the long-run, more stable to price changes than national corn supply as a whole. Including heterogeneity in supply response also provided policy relevant context to supply response studies. Overall supply response was negatively correlated with area yields. This meant that price changes have a larger effect on planted corn acres and a smaller effect quantity of corn itself. In the last chapter I examine the impact that ethanol plant capacity has on local land use at the extensive margin. The Renewable Fuel Standard (RFS) has been one of the most influential agricultural policies in the past 20 years, increasing general US crop prices by over 20% and inducing a substantial in US ethanol production capacity (Carter et al., 2016; Roberts and Schlenker, 2013). Its effect on cropland extensification was a concern before it was passed since the policy includes a stipulation forbidding ethanol production on cropland converted after 2007. Lands at the extensive margin tend to be less productive and more environmentally sensitive. Extensive transitions also tend to be less frequent than transitory breaks in crop rotations making their impacts longer-lasting. The goal of this final analysis is to isolate the impact of ethanol expansion on cropland transitions from the general price changes. The concurrent increase in general crop prices and ethanol construction from the RFS complicates the estimation of plants’ effects. I isolate these effects using difference- in-differences (DID) which removes impact from common price trends between the treatment and control group. The standard DID approach results show significant pre-treatment effects stemming from non-random ethanol plant construction. Treatment is likely non-random since ethanol plants lo- cate in areas that provide better returns. Factors that impact the returns to plants confound the analysis since they likely also impact cropland transition decisions. To address this, I use propensity score matching to ensure these confounding factors are identically distributed between the treatment and control groups. Under the matched DID models, the expansion of ethanol plants tended to increase cropland retainment and reduce lands transitioning from non-cropland to cropland. While these results seem contradictory, they are consistent with the findings in recent literature. These impacts are thought to arise due to higher program retention in the major US cropland retirement program CRP due to changes that disproportionately impacted major ethanol production areas.

The central objective of the investigation in this study is to determine a means of attaining an economically efficient combination of resources to maximize the level of services provided by a national park under the conditions of a limited budget, a constrained production possibilities set, and a limited availability of inputs. First, a theoretical model is built which elucidates the collective and private good natures of national park products. The theory identifies the optimality criteria for the provision of park products in a system of limited resources. It is noted, however, that the theoretically determined optimal solution cannot be expected to emerge automatically in a market situation due to the social good nature of some park products. Therefore, a second-best objective of maximizing the value of the park's output as evaluated by the park's superintendent is adopted for use in the study's applied analysis. The empirical model which is then constructed, combines concepts from economic theory and mathematical programming which lend themselves to solving the production economizing problems facing a park. It offers national park managers operational tools for aiding in their decision-making. While the paper points to important implications for current policy, it also indicates promising directions for future study .