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The Speed and Impact of a New Technology Diffusion in Organ Transplantation: A Case Study Approach 器官移植新技术扩散的速度和影响:一个案例研究方法
Pub Date : 2011-04-01 DOI: 10.2139/ssrn.1742649
Yu Sang Chang, Jinsoo Lee, Yun Seok Jung
A miracle in medical procedure, organ transplantation, has taken place in recent decades due to the diffusion of a new technology. The new technology refers to a family of the so‐called immunosuppressive drugs. As a result, survival rates of major organ transplants have risen to a record‐level of 80 to 90%. This paper has four objectives. First, the speed of new technology diffusion is measured from the historical penetration ratio for the major immunosuppressive drugs. It took, on average, 6 to 8 years for new drugs to gain the 50% penetration ratio. Second, historical improvement patterns of survival rates for major organ transplants are analyzed by the use of both classical and kinked experience curves. The results indicate that kinked experience equations generated much steeper slopes. Third, the relationship between the increased penetration ratios of new drugs to the improved survival rates of organ transplants is analyzed. Overall, rapid diffusion of new drugs appears to have caused faster improvement of the survival rates. Finally, we forecast the future improvement of survival rates through 2030 by the use of kinked experience equations. Our forecast shows that nearly every type of transplant will reach 90% or higher survival rates by 2020.
近几十年来,由于一项新技术的普及,器官移植在医疗过程中出现了一个奇迹。这项新技术指的是一类所谓的免疫抑制药物。因此,主要器官移植的存活率已经上升到80 - 90%的创纪录水平。本文有四个目的。首先,从主要免疫抑制药物的历史渗透比来衡量新技术扩散的速度。新药平均需要6到8年的时间才能达到50%的渗透率。其次,通过使用经典和扭结经验曲线分析了主要器官移植生存率的历史改善模式。结果表明,扭结经验方程产生了更陡的斜坡。第三,分析新药渗透率的提高与器官移植存活率的提高之间的关系。总的来说,新药的迅速传播似乎使生存率得到了更快的提高。最后,我们通过使用扭结经验方程预测了到2030年生存率的未来改善。我们的预测显示,到2020年,几乎每种移植手术的存活率都将达到90%或更高。
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引用次数: 3
Forecasting Road Fatalities by the Use of Kinked Experience Curve 利用弯曲经验曲线预测道路死亡人数
Pub Date : 2011-01-17 DOI: 10.2139/ssrn.1650482
Yu Sang Chang, Jinsoo Lee
According to the World Health Organization, more than one million road traffic deaths occur every year throughout the world. Many countries have established quantified road safety targets in response. Road safety targets need to be based on reliable forecasting methods. This paper attempts to develop such forecasting models for 13 OECD countries based on the data available from 1970 to 2007.Deploying the methodology of both classical and kinked experience curves, we obtained the averaged experience slope of 55% from the kinked experience curve in contrast to 68.6% from the classical experience curve. The averaged standard deviation and R2 calculated also show better fit to the data for the kinked analysis.For the two simulated forecasting periods, we, then, calculate mean absolute percentage error (MAPE) to measure forecasting accuracy. In comparing the MAPEs, we find that forecasting accuracy for the kinked models is significantly higher.Finally, we use our kinked models to forecast the road fatalities for 13 countries through 2030. All the countries will experience a considerable reduction in their road fatality rates. The averaged fatality rate of 7.94 in 2010 for these 13 countries is projected to decline to 5.83 in 2020 and 4.54 in 2030.
据世界卫生组织统计,全世界每年有100多万人死于道路交通事故。许多国家为此制定了量化的道路安全目标。道路安全目标需要以可靠的预测方法为基础。本文试图基于1970年至2007年的数据,对13个经合组织国家建立这样的预测模型。采用经典经验曲线和扭曲经验曲线的方法,我们从扭曲经验曲线中获得平均经验斜率为55%,而从经典经验曲线中获得平均经验斜率为68.6%。计算的平均标准差和R2也显示出与扭结分析的数据更好的拟合。对于两个模拟预测期,我们计算平均绝对百分比误差(MAPE)来衡量预测精度。通过比较mape,我们发现扭结模型的预测精度明显更高。最后,我们使用我们的扭结模型来预测13个国家到2030年的道路死亡人数。所有国家的道路死亡率都将大幅下降。这13个国家2010年的平均死亡率为7.94,预计到2020年将降至5.83,到2030年降至4.54。
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引用次数: 11
Post-Crisis Corporate Reform and Internal Capital Markets in Chaebols 金融危机后企业改革与财阀内部资本市场
Pub Date : 2009-12-01 DOI: 10.2139/ssrn.1523630
Joon-Kyung Kim
The 1997 financial crisis turns out to be a major turning point in the history of Korean chaebols. The post-crisis corporate reform has resulted in a dramatic change in the landscape of chaebols as about one half of the top 30 chaebols changed their names after the crisis. The reform was swift and unprecedented in its comprehensiveness encompassing a wide range of structural changes in the financial structure and corporate governance of chaebols. Improved transparency and strengthened shareholder rights helped chaebols to have greater access to cheaper external finance made available by capital market opening. Nevertheless, the corporate reform is an ongoing process in Korea with full effects yet to be seen. Our empirical findings suggest that the role of internal capital markets has faded out after the crisis but not fully yet. Investment by non-listed chaebol firms remains fairly insensitive to the own cash flow if the firm belongs to a chaebol that owns financial intermediaries. The positive effect of corporate reform appears to have been felt asymmetrically between non-listed firms whose ownership is more concentrated and listed firms that are now subject to more stringent international standards and monitoring by shareholders. These findings imply that key policy challenges in the future are to eliminate the gap between de jure institution and de facto enforcement standards.
1997年的金融危机是韩国财阀历史上的一个重大转折点。金融危机后的企业改革使财阀格局发生了巨大变化,30大财阀中有一半左右在金融危机后改名。此次改革的速度之快、范围之广,涉及财阀金融结构和企业治理结构的诸多结构性变化,可谓史无前例。透明度的提高和股东权利的加强,帮助财阀更容易获得资本市场开放带来的更廉价的外部融资。但是,韩国的企业改革仍在进行中,还没有看到完全的效果。我们的实证研究结果表明,内部资本市场的作用在危机后逐渐消失,但尚未完全消失。如果企业属于拥有金融中介机构的财阀,那么非上市财阀企业的投资对自身的现金流相当不敏感。公司改革的积极影响在所有权更集中的非上市公司和现在受到更严格的国际标准和股东监督的上市公司之间似乎是不对称的。这些研究结果表明,未来的主要政策挑战是消除法律制度与实际执行标准之间的差距。
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引用次数: 1
Case Study of POSCO - Analysis of its Growth Strategy and Key Success Factors 以浦项制铁为例——浦项制铁成长战略及成功要素分析
Pub Date : 2009-11-01 DOI: 10.2139/SSRN.1505288
Seung-Joo Lee, Eun-Hyung Lee
POSCO has played a major role in Korea’s economic development by supplying domestic manufacturers with high-quality, low-cost steel products. Despite its initial disadvantage and lack of resources such as capital, technology, and raw materials, it has emerged as a world-class steel maker in a short span of time. This case study aims to explore and analyze the key success factors of POSCO through examination of the company’s growth and development process. In particular, it examines the role of government policy, top management leadership, technology learning and innovation, cost competitiveness and other factors as important drivers of success. The case also identifies its strategic challenges and key issues for growth in the future.
浦项制铁向国内企业提供高质量、低成本的钢铁产品,为韩国经济的发展发挥了重要作用。尽管最初处于劣势,缺乏资金、技术和原材料等资源,但它在短时间内成为了世界级的钢铁制造商。本案例旨在通过对浦项制铁公司成长和发展过程的考察,探索和分析浦项制铁成功的关键因素。它特别研究了政府政策、最高管理层领导、技术学习和创新、成本竞争力和其他因素作为成功的重要驱动因素的作用。本案例还指出了其战略挑战和未来增长的关键问题。
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引用次数: 6
Public Finance Management in Indian States 印度各邦的公共财政管理
Pub Date : 2009-10-30 DOI: 10.2139/ssrn.2708623
N. Verma
This paper empirically constructs the fiscal performance index for Indian states by using nine separate indicators reflecting different dimensions of fiscal performance of the states. Finance Commissions also use fiscal performance for fund allocations but they use only single indicator based formula which is prone to inefficiency. There is a need for more sophisticated methods for assessing the fiscal performance more carefully. Present paper is an attempt to construct such an index to understand the public finance management of Indian states. My analysis suggests that Chandigarh and Tamilnadu are the best managers and Andhra Pradesh, Gujarat and Haryana have fairly good public finance management. On the other hand, West Bengal, Uttar Pradesh and Punjab are the worst managers.
本文利用反映各邦财政绩效不同维度的9个独立指标,实证构建了印度各邦财政绩效指标。财务委员会也使用财政表现来分配资金,但它们只使用基于单一指标的公式,这容易导致效率低下。有必要采用更复杂的方法来更仔细地评估财政表现。本文试图构建这样一个指标来理解印度各邦的公共财政管理。我的分析表明,昌迪加尔和泰米尔纳德邦是最好的管理者,安得拉邦、古吉拉特邦和哈里亚纳邦的公共财政管理相当不错。另一方面,西孟加拉邦、北方邦和旁遮普邦是最差的管理者。
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引用次数: 1
Limit to Improvement: Myth or Reality? Empirical Analysis of Historical Improvement on Three Technologies Influential in the Evolution of Civilization 进步的极限:神话还是现实?影响文明演变的三种技术的历史进步实证分析
Pub Date : 2009-07-01 DOI: 10.2139/ssrn.1444165
Yu Sang Chang, Seungmin Baek
The evolution of civilization appears to have primarily resulted from continuous improvement made possible by technological advances. A group of social evolutionists and economists have identified, among others, energy, transport, as well as information and communication to be the three most influential technologies. On the other hand, a number of eminent scholars have cited several forces, natural, physiological, technological, as well as environmental which can place a limit on on-going improvement. The purpose of this paper is to empirically explore the continuous improvement process as well as the limit placed on these three technologies. Using the framework of both connected and disconnected multiple technology S-curves and X-factor, historical improvement data on these three elements have been analyzed. The results of our analysis indicate that improvement in general has continued without limit mainly due to a series of emerging new technologies. These emerging technologies can be either connected or disconnected from the existing mature technologies. Our preliminary analysis shows that much of the past improvement comes from new technologies that on first serious application appear to be substantially superior from earlier technologies. In addition, enormous continuous improvement, which has accompanied both connected and disconnected new technologies appear to have played the critical role in sustaining the evolution of civilization. The paper discusses a number of policy implications and suggests topics for future research.
文明的进化似乎主要是由于技术进步使不断的改进成为可能。一群社会进化论者和经济学家认为,能源、交通以及信息和通信是最具影响力的三种技术。另一方面,一些著名学者列举了自然的、生理的、技术的以及环境的力量,这些力量会限制持续的改进。本文的目的是实证探讨持续改进的过程,以及对这三种技术的限制。采用连通和不连通的多技术s曲线和x因子的框架,对这三个要素的历史改进数据进行了分析。我们的分析结果表明,由于一系列新技术的出现,总体上的改善一直在无限制地继续。这些新兴技术可以与现有的成熟技术相连接,也可以与之分离。我们的初步分析表明,过去的许多改进来自新技术,这些新技术在第一次认真应用时似乎比以前的技术要好得多。此外,伴随着连接和分离的新技术而来的巨大的持续改进似乎在维持文明的演变中发挥了关键作用。本文讨论了一些政策影响,并提出了未来研究的主题。
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引用次数: 22
Making Strategic Short-Term Cost Estimation by Annualized Experience Curve 利用年化经验曲线进行战略性短期成本估算
Pub Date : 2009-02-01 DOI: 10.2139/ssrn.1344150
Yu Sang Chang
For strategic purposes of setting price and productivity targets, organisations need to make projection of long-term cost as well as short-term cost estimation. For long-term cost estimation, organisations do rely on the experience curve among other methodologies. However, for short-term cost estimation, organisations rely more on cost accounting, budgeting and engineering approaches. Why? This paper discusses major obstacles of using experience curve and develops an alternative concept of annualised experience curve. The annualised experience curve enables the estimation of current unit cost for the next period simply as function of the growth rate of the next period's production volume over that of the current period. Thus, the annualised experience curve offers a viable alternative to other time-based percentage forecasting methods in use. When the annualised experience curve is used, it will likely bring an added benefit of including more experts from production and marketing areas in the process of cost estimation.
为了制定价格和生产力目标的战略目的,组织需要对长期成本进行预测,以及对短期成本进行估计。对于长期成本估算,组织确实依赖于其他方法中的经验曲线。然而,对于短期成本估算,组织更多地依赖于成本会计、预算和工程方法。为什么?本文讨论了使用经验曲线的主要障碍,提出了一种替代的年化经验曲线概念。年化经验曲线可以简单地估计下一时期的当前单位成本,将其作为下一时期产量相对于当期产量增长率的函数。因此,年化经验曲线为其他基于时间的百分比预测方法提供了可行的替代方案。当使用年化经验曲线时,它可能会带来额外的好处,在成本估算过程中包括更多来自生产和营销领域的专家。
{"title":"Making Strategic Short-Term Cost Estimation by Annualized Experience Curve","authors":"Yu Sang Chang","doi":"10.2139/ssrn.1344150","DOIUrl":"https://doi.org/10.2139/ssrn.1344150","url":null,"abstract":"For strategic purposes of setting price and productivity targets, organisations need to make projection of long-term cost as well as short-term cost estimation. For long-term cost estimation, organisations do rely on the experience curve among other methodologies. However, for short-term cost estimation, organisations rely more on cost accounting, budgeting and engineering approaches. Why? This paper discusses major obstacles of using experience curve and develops an alternative concept of annualised experience curve. The annualised experience curve enables the estimation of current unit cost for the next period simply as function of the growth rate of the next period's production volume over that of the current period. Thus, the annualised experience curve offers a viable alternative to other time-based percentage forecasting methods in use. When the annualised experience curve is used, it will likely bring an added benefit of including more experts from production and marketing areas in the process of cost estimation.","PeriodicalId":347047,"journal":{"name":"KDI School of Public Policy & Management Research Paper Series","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117010416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Innovation Offshoring and Asia's Electronics Industry - The New Dynamics of Global Networks 创新离岸外包与亚洲电子工业——全球网络的新动态
Pub Date : 2008-05-25 DOI: 10.1504/IJTLID.2008.021968
D. Ernst
This paper explores how innovation offshoring gives rise to Global Innovation Networks (GINs) in the electronics industry. The focus is on chip design. The paper documents the scope of offshoring and the progress achieved in the complexity of design stages and in capability upgrading in Asia. The paper explores the forces that are responsible for the organisational and geographical mobility of innovation within GINs emphasising their systemic nature. The paper argues that innovation offshoring is likely to accelerate Asia's transformation from the 'global factory' model to 'upgrading through innovation'. But massive challenges must be mastered before Asia's leading electronics exporting countries can exploit these opportunities. Such challenges result from the very demanding requirements that locations need to fulfil in order to qualify for R&D investments by Transnational Corporations (TNCs).
本文探讨了创新外包如何在电子产业中产生全球创新网络(GINs)。重点是芯片设计。该文件记录了离岸外包的范围以及亚洲在设计阶段的复杂性和能力升级方面取得的进展。本文探讨了负责创新的组织和地理流动性的力量,强调了它们的系统性。本文认为,创新离岸外包可能会加速亚洲从“全球工厂”模式向“创新升级”模式的转变。但在亚洲主要电子产品出口国利用这些机遇之前,必须克服巨大的挑战。这些挑战来自于为了获得跨国公司(TNCs)的研发投资而需要满足的非常苛刻的要求。
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引用次数: 20
Do India's AEZs Need a Fresh Start? 印度的专属经济区需要重新开始吗?
Pub Date : 2008-03-15 DOI: 10.2139/ssrn.1139068
S. Mitra, K. Ghosh
Agricultural exports from developing countries are facing stringent barriers in the form of sanitary and phytosanitary measures as well as technical barriers: the need of the hour, therefore, is to develop robust Agricultural Exporting Zones (AEZs) to promote organic cultivation of exportable produce. Our analysis of the future growth potential of AEZs in India is based on two planks: a theoretical cost benefit analysis and a case study approach. The theoretical cost benefit analysis highlights the trade-off between factors that enhance profitability on the one hand and others that lead to a reduction in profitability. The case study approach complements this theoretical analysis by looking at the ground reality of AEZs in the Indian state of West Bengal. The case study shows that practical considerations such as the lack of marketing alternatives; the monopoly enjoyed by agricultural exporters; lack of market information and institutionalised communication channels between exporters and farmers; the scarcity of suitable variable inputs such as organic manure as well as the absence of storage infrastructure adversely impact the bargaining power of farmers in negotiating prices for their produce. The study therefore implies that the theoretically plausible trade-off often does not exist in reality. From the point of view of profitability, cultivation of organic crops is often clearly unattractive compared to non-organic cultivation, given the institutional ground reality prevalent in India. This important conclusion in turn leads to the policy recommendation that for a take-off in agricultural exports, which are becoming increasingly organic in composition, the following have to be effected - improvement in marketing information channels (computerised information, radio and television bulletins etc.), development of storage infrastructure (cold storages, warehouses etc.) and greater and cheaper availability of inputs needed for organic agriculture.
发展中国家的农产品出口正面临严格的卫生和植物检疫措施以及技术壁垒:因此,当务之急是发展强有力的农业出口区(aez),以促进可出口农产品的有机种植。我们对印度经济特区未来增长潜力的分析基于两个方面:理论成本效益分析和案例研究方法。理论成本效益分析强调了一方面提高盈利能力的因素与另一方面导致盈利能力降低的因素之间的权衡。案例研究方法通过观察印度西孟加拉邦经济特区的实际情况,补充了这一理论分析。案例研究表明,实际考虑因素如缺乏营销替代方案;农业出口商所享有的垄断;出口商和农民之间缺乏市场信息和制度化的沟通渠道;适当的可变投入物(如有机肥)的缺乏以及储存基础设施的缺乏对农民在农产品价格谈判中的议价能力产生不利影响。因此,这项研究表明,理论上合理的权衡往往不存在于现实中。从盈利的角度来看,考虑到印度普遍存在的制度现实,有机作物的种植通常明显没有有机种植的吸引力。这一重要结论反过来又导致了政策建议,即为了农业出口的起飞,其组成越来越有机,必须实施以下措施-改善营销信息渠道(计算机化信息,广播和电视公告等),发展储存基础设施(冷藏库,仓库等)以及有机农业所需投入的更多和更便宜的可用性。
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引用次数: 0
The East Asian Miracle: Export-led or Investment-led? 东亚奇迹:出口导向型还是投资导向型?
Pub Date : 2008-03-01 DOI: 10.2139/ssrn.1119164
Y. Yoo
Disagreements persist on whether the Korean and Taiwanese economic miracle is export-led as advocated by market fundamentalists or investment-led as envisioned by the market interventionists. The Granger causality test has been conducted within the context of a VAR system comprised of exports, investment, imports and GDP. The test results show that the fundamentalists' version is more compatible with the data than the interventionists'.
对于韩国和台湾的经济奇迹是市场原教旨主义者所倡导的出口导向型,还是市场干预主义者所设想的投资导向型,分歧依然存在。在由出口、投资、进口和GDP组成的VAR系统的背景下进行格兰杰因果检验。测试结果表明,原教旨主义者的版本比干预主义者的版本更符合数据。
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引用次数: 5
期刊
KDI School of Public Policy & Management Research Paper Series
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