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1.
Hidetoshi Murakami 《Statistica Neerlandica》2014,68(4):267-275
Calculating the probability of the corresponding significance point is important for finite sample sizes. However, it is difficult to evaluate this probability when the sample sizes are moderate to large. Under these circumstances, consideration of a more accurate approximation for the distribution function is extremely important. Herein, we performed a saddlepoint approximation in the upper tails for the distribution of the sum of independent non‐identically uniform random variables under finite sample sizes. Saddlepoint approximation results were compared with those for a normal approximation. Additionally, the order of errors of the saddlepoint approximation was derived. © 2014 The Authors. Statistica Neerlandica © 2014 VVS. 相似文献
2.
Chikako Keumi Hideki Murakami 《Transportation Research Part E: Logistics and Transportation Review》2012,48(5):1023-1031
We empirically study passenger modal-choice behavior to access an international hub airport, by using stated preference (SP) data and by constructing a binomial logit model. We found that passenger modal choice is affected by the service level of the access modes: travel time, travel cost, waiting time, and delay cost. The results also indicate that if passengers choose access mode in advance they consider service frequency: departure timing from home, and the arrival timing at the airport. Moreover, our results indicate that travelers’ willingness to pay for saving time differs by time of a day. They are apt to pay more in the morning than in the afternoon. These outcomes must contribute to improve the access flight service from local to hub airports to handle the needs of passengers. 相似文献
3.
This paper proposes a new methodology of evaluating industrial R&D projects to assess the effectiveness of future R&D in terms of financial credibility, to prioritize them efficiently by clear criteria to reduce the time and burden consumed by both project leaders and management staffs. A new methodology has been developed and applied to all Sumitomo Electric Industries (SEI) R&D projects, and is recognized as a useful system for evaluating many R&D projects in a short period, such as 150 projects per month. 相似文献
4.
Hideki Murakami 《Pacific Economic Review》2011,16(1):103-119
This paper empirically analyzes dynamic change in inter‐firm rivalry between Japanese low‐cost carriers (LCC) and full‐service carriers, and deduces the dynamic change in consumer surplus after an LCC enters a market. Our findings are that: (i) the conduct parameters of LCC and reacting full‐service carriers were extraordinarily low when competition started; (ii) the conduct parameters were restored to, or even exceeded, the pre‐entry level in the third year of LCC entry; and (iii) gains in total welfare were recognized for five of the nine markets, whereas in three markets only the airline industry benefited, and in one market, total welfare decreased. 相似文献
5.
Kyo Tsuda M.D. Hironobu Nakamura Takamichi Murakami Takahiro Kozuka Machiko Yoshii Koji Isozaki Yasuo Tsukahara Mototaka Takami Masato Hanada 《Empirical Economics》1993,18(3):283-285
We encountered a patient with steroidrelated peliosis of the spleen, a rare disease characterized by multiple blood-filled cavities in the splenic parenchyma, with spontaneous intraperitoneal hemorrhage. The ultrasonographic, computed tomographic, and angiographic images were compared with pathologic findings of the material obtained surgically. 相似文献
6.
Kohei Ichikawa Toshihiko Takemura Masatoshi Murakami Kazunori Minetaki Taiyo Maeda 《The Review of Socionetwork Strategies》2011,5(1):1-16
The objective of this paper is to find a new method to estimate real social networks based on observed data collected by questionnaire surveys. Studies on social networks have been increasing in order to analyze social phenomena from a micro viewpoint. Most social phenomena can be explained by micro-level interactions among people. Spread of rumor and pandemics are typical example of micro interaction? However, there has not been much work on an analysis of real social networks based on observed data. This study tries to establish a methodology that exploits a genetic algorithm to rebuild a social network based on the data observed indirectly from real social networks. This paper introduces our proposed method, which allows us to rebuild a social network to some extent from degree distributions of a target real social network. 相似文献
7.
The paper examines how efficiency of sharecropping under uncertainty can be tested empirically. It demonstrates even under uncertainty, equality of factor ratios between sharecropped land and owner-cultivated land supports the hypothesis that the terms of share contracts are effectively enforced by landlords, so as to achieve socially optimum resource allocation and risk sharing, unless the direct elasticities of substitution are identically equal to one. It also provides evidence, that the comparative yield tests conducted in different parts of South and Southeast Asia support the efficiency view of sharecropping. 相似文献
8.
In this study, we use a hypothetical method to recalculate the agricultural labor force based on statistical data on the labor force in China. We confirm the revised agricultural labor force data by estimating the agricultural production function. Through comparing the marginal labor productivity with the subsistence level of wages in the agricultural sector, we find that the overstated figures of agricultural labor force not only result in the underestimation of agricultural labor productivity but also are misleading by indicating that China reaches the Lewis turning point later than in actuality. The process of labor transfer in China, a large part of which is through rural migrant workers, has been much faster than expected. 相似文献
9.
This study empirically analyzes the direct impacts derived from the swift increase in exports to China (referred to as “the impact of China”) on the economic growth of three selected South American countries, Brazil, Chile, and Peru, during the commodity boom between 2001 and 2008. The results stemming from the balance-of-payments-constrained growth model suggest that the magnitude of China’s impact was less than 1 percent, although it ranged from the largest to the second largest impact among all trading partners for the three countries. The estimated balance-of-payments growth rate of domestic income is lower than the real growth rate of domestic income. This is because the growth rates of the export volumes were not sufficient even during the commodity boom, on account of the continued increasing trends of income elasticity of demand for imports. Furthermore, the income elasticities of demand for imports from China were especially high. Therefore, the three countries will continue to face further increase in the income elasticity of demand for imports as well as a stagnant growth rate of export volumes. Thus, the balance-of-payments position will continue to be the main growth constraint for these countries. 相似文献
10.
中国企业的效率和生产率及其决定因素——基于包络线分析的讨论 总被引:3,自引:0,他引:3
自70年代末开始施行的改革开放政策以来,中国开始专注于各类企业改革。以提高生产效率为目的,所取得的成果是近年来惊人的经济增长,对此成就已不容置疑。但是另一方面,国有企业部门的经营改善等企业改革还在进行过程中,这也是事实。因此,对目前企业改革的具体成果从微观角度在数据上加以清晰化依然是重要的研究主题。 相似文献