The Process of Fit Between the Contingency Factors of the Environment and the Structural Design Parameters

Abstract

This paper, using a sample of 150 Spanish companies of large size, aim to corroborate the postulates determined by the contingency models regarding the relationships between the organisational environment and structural design parameters. Our basic aim is to establish the different relative importance of each of the elements characterising the environment to the design parameters. The results obtained show that the first relation to be clearly observed is that between level of complexity of the environment and the degree of organicity of the structure. However, such an evident relationship is not observed between the degree of dynamism of the environment and the level of organicity. As for the relation between degree of hostility of the environment and the design parameters analysed, the contingent hypotheses that predict that the degree of centralisation of the structure increases with the hostility of the environment are confirmed.     

Modelling real exchange rate effects on output performance in Latin America

This article empirically analyses real per capita GDP growth for six Latin American countries (Argentina, Brazil, Chile, Columbia, Mexico, Venezuela) in terms of real exchange rate depreciations, inflation and US interest rates, focussing on the role of the real exchange rate. We find evidence of nonlinearity in this relationship, which we capture through a smooth transition regression model. With the exception of Mexico, nonlinearity in economic growth is associated with changes in the real exchange rate, with depreciations leading to different relationships compared with appreciations. Regimes for Mexico are associated with the past growth rates, with effectively symmetric effects of real exchange rate changes. Although our results are in accord with other recent literature in that depreciations may have negative effects for growth, the asymmetries we uncover indicate that these effects depend on the conditioning state.     

EBH315掘进机总体设计中重要参数的确定

本文论述了EBH315型掘进机的机型选择、截割功率、截割速度、整机重量及重心位置、接地比压和几何尺寸等总体设计中重要参数的确定方式,并在此基础上提出了EBH315掘进机的主要技术参数。     

我国互联网金融与传统金融共生发展研究--基于Logisitic增长模型的实证分析

本文以金融共生理论为切入点,首先对金融共生的基本要素及共生关系的判定标准进行了介绍,随后在Logisitic增长模型的框架下,分别选取P2P与银行业作为互联网金融与传统金融的代表,对互联网金融与传统金融的共生性进行了实证分析,最后依据实证分析结果,提出了互联网金融与传统金融共生发展的路径选择。     

基于GPS定位的飞机航迹矢量算法

航迹矢量是描述航空器运动状态的一个重要参数,在导航计算、空中交通管理中起着非常重要的作用,基于航空器经纬度坐标推算航迹矢量是一种基本方法,MATLAB中提供的计算公式将地球视为球体导致计算精度不高.提出一种基于经纬度的航迹矢量算法,并利用塞斯纳172R机型的飞参数据机型验算.结果表明该算法精度较高、算法计算简便,可以用于航空器监视、领航作业和空中交通管理服务中.     

金属粉芯焊在气田站场工艺中的引进与实用性分析

金属粉芯型气体保护焊丝被评价为"代替实芯焊丝的焊接材料",它既有渣量少的实心焊丝的长处又兼备高熔敷速度、电弧柔软、焊接工艺性能好等熔渣型药芯焊丝的优点,金属粉芯焊丝在大口径长输管道中成熟应用,但是对于站场工艺应用较少,现对金属粉芯焊在气田站场工艺的引进与实用性进行分析。     

盾构法隧道施工穿越淤泥质软土地层控制沉降技术探讨

城市地铁建设中,采用盾构法穿越淤泥质软土地层时,造成地面沉降较大,难以保证地面重要建筑物和设施的安全,同时也造成施工成本增加。本文从优化盾构推进参数和同步注浆等方面,就如何控制沉降进行了初步的探讨。     

Testing parameter constancy in linear models against stochastic stationary parameters

This paper considers testing parameter constancy in a linear model when the alternative is that a subset of the parameters follows a stationary vector autoregressive process of known finite order. This kind of a linear model is only identified under the alternative, which usually precludes finding a test statistic with an analytic null distribution. In the present situation, however, it is still possible to derive a test statistic with an asymptotic chi-squared distribution under the null hypothesis and this is done in the paper. The small-sample properties of the test statistic are investigated by simulation and found statisfactory. The test retains its power when the alternative to parameter constancy is a random walk parameter process.     

Retaining telecommunication services when universal service is defined by functionality: Japanese consumers' willingness-to-pay

This study uses contingent valuation to measure Japanese customers' willingness-to-pay to maintain combinations of five telecommunication services that are considered substitutes if universal service is defined on the basis of functionality. The analysis revealed the following results. First, consumers are more willing to pay to retain voice communication services than data transmission services. Second, customers accept Internet Protocol telephony as a substitute for plain old telephone service (POTS) as a universal service, and they are willing to pay much more than Japan's current Universal Service Fund charge. Third, even when mobile phone service (MOB) is available, consumers will pay to retain fixed-line voice services. Finally, consumers have an equal desire to keep fiber-to-the-home (FTTH) and fixed-line voice services, but it is less than the demand for MOB. Thus, under the present definition of POTS as a universal service, FTTH could be considered as a basic telecommunication service.     

Correcting for On-Site Sampling in Random Utility Models

This study demonstrates how the joint distribution of a set of conditional trip counts to a system of recreation-sites can be adjusted for on-site sampling. An econometric approach is proposed that addresses both the size-biased distribution of the sampled visits and the weighted distribution of reported visits to ancillary destinations in a multivariate random utility framework. Estimation results indicate that uncorrected models produce biased estimates of trip counts and welfare measures. The empirical application examines jet skiing in the Lake Tahoe region.