首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 46 毫秒
1.
道格拉斯生产函数是一种最常见的模型。人们经常利用这个模型对宏观经济进行研究,如对毛积累率和净积累率的研究等。因此道格拉斯生产函数在实际应用中具有重要作用。但笔者经常看到在应用道格拉斯生产函数时人们往往忽略它的具体应用条件,因而得出的结论具有严重的失效性。道格拉斯生产函数是在生产过程处于均衡增长状态下提出来的,对积累率的研究也是在均衡增长状态下进行的,这与在生产一一投入就研究积累问题具有重大差别,前者是待生产进入正常发展阶段后开始积累,后者从某种意义上讲是“杀鸡取蛋”的方式,限制了生产正常发展。为此,正确使用道格拉斯模型,首先必须满足模型的条件,这一点是  相似文献   

2.
张威 《中国房地信息》2022,(11):180-182
本设计为北京市某卫星地面站中心机房暖通空调设计。该卫星地面站场地大小为420m*420m,其中心机房位于场地正中心,主体结构全部在地坪以下,层高3.9米,呈圆形设计,设计控制建筑面积1200平方米。中心机房两侧分别设置生活区和辅房区作为配套用房。根据“设计要求”,中心机房为全地下式结构,地面以上所有构筑物不得超过0.6...  相似文献   

3.
煤、石油、天然气是现阶段我国应用最为广泛的化学能源,虽顺应节能减排要求,但对其开采的力度仍然较大,而且在未来较长一段时间内仍会持续,为了满足需要不得不将开采范围扩展到山地或不等高地区,本文将从不等高地区油库设计的角度进行研究,通过对其设计特点分析,紧抓油库设计的要点,并系统的提出设计中容易出现的问题.  相似文献   

4.
简述了自蓉线工程不等高斜柱式铁塔基础的分坑、制模以及其浇制等子工序的尺寸控制方法。  相似文献   

5.
对最后一点也饥渴没有企业不渴望的,出口企业不想要退税那是不可能的,说提高退税意义不大的肯定不是真正的出口企业,对于出口退税提高最后一点,您觉得意义大吗的提问,北京莱特尔时装有限公司的总经理张莉莉给出了肯定的回答,而且她认为:出口退税对出口企业来说,什么时候都意义重大,不管是升是降,都紧牵企业之心。  相似文献   

6.
设备在使用过程中,如果出现非常见故障或维修者还缺乏对该设备的维修经验时,应十分讲究诊断与处理的方法,以便取得较好的效果。下面,通过对一例故障的分析、诊断与处理,谈谈对设备故障诊断方法的一点粗浅体会。一、故障现象一台日本进口的 DSG—30E 双端面磨床,投产仅一个月便出现故障:在修正砂轮时,左磨头骤然停止转动,并导致整机停车。此时,用手拨不动磨头。  相似文献   

7.
本文应读者要求,着重介绍了格利森硬质合金铣刀盘的数学模型在求解过程中的技巧问题。  相似文献   

8.
简洁离我们有多远?在通往简洁的道路上,有许许多多的敌人,如果有可能的话,应该陆续把一个又一个敌人拍倒、干掉,让它们闪在一旁,少碍事!一般情况下,一个作者把构成一篇文章的材料,搜集到一定程度,就已经很费事、费劲了;取舍时,很难在舍字上做足功课。若干添乱的东西,非常有可能,作者看不出来;或者,能感觉到某些素材,差点意思,但依旧舍不得扔了。  相似文献   

9.
正商标功能的实现有赖于商标的实际使用,只有通过在商业活动中实际使用才能实现商标的价值,因此,注册商标权人有积极连续使用注册商标的法定义务,否则将承担法律明确规定的不利后果。对此,现行《商标法》第四十四条做出了有关注册商标连续三年停止使用制度(以下简称"撤销制度")的规定。在实践中,一方面,由于各种原因,我国商标申请量连续多年居全世界之首,由此存在大量"死"商标,这些商标注册  相似文献   

10.
论述了设计院质量管理的主要控制环节,通过对培养质量意识,做好设计输入、设计评审、产品校审和确认等质量管理工作,提高产品质量,供设计企业的同行参考借鉴。  相似文献   

11.
    
Research summary : This study employs longitudinal multilevel modeling to re‐examine the relative importance of business unit, corporation, industry, and year effects on business unit performance. Total variance in performance is partitioned into stable variance and dynamic variance. Sources of these two parts of variance are explored. Empirical results indicate that (1) stable effects of corporation‐industry interaction are substantially important, but were unequally confounded with stable effects of business unit, corporation, and industry in results of previous studies; (2) stable effects of corporation, industry, and corporation‐industry interaction, taken together, are of similar relative magnitude to stable effects of business unit; and (3) random and nonlinear year effects are very important in explaining dynamic variance. These findings extend our theoretical and empirical understanding of performance variability. Managerial summary : Whether stable or changing, business units themselves, corporate‐parents, and industries influence business unit operations. This article investigates the relative effects of these factors on business unit performance. Although the traditional wisdom is that business unit is critical, this research finds that corporate‐parent, industry, and interactions between these, taken together, are as influential as business unit. Specifically, interactions between corporate‐parent and industry are important for over‐time average business unit performance, indicating that a given corporate‐parent unevenly influences its business units in different industries and that a particular industry unevenly influences business units within itself from different corporate‐parents. This study also demonstrates that changes in business unit, corporate‐parent, and industry are important drivers of over‐time volatility of business unit performance and that effects of these changes differ. Copyright © 2016 John Wiley & Sons, Ltd.  相似文献   

12.
A fuzzy random continuous review system has been presented in this paper with the annual customer demand assumed to be a uniformly distributed continuous fuzzy random variable. Besides the reorder point and the production lot size, the setup cost and the ‘out of control’ probability for a production process have been assumed to be control parameters in the model. Investments to reduce the setup cost and improve the process quality have been incorporated into the total cost in this regard. A methodology has been proposed to minimize this cost and it has been illustrated by way of a numerical example.  相似文献   

13.
There is a rich literature devoted to the role women play in ensuring the food security of the household and other household members. However, relatively little attention has been paid to their own food security situation. The challenge with investigating the food security of women is that most surveys collect food security data at the household level making inferences about individual-level food security difficult. Using a large international sample of individual-level data and the first global experiential measure of food insecurity, I show that women have a higher probability of being food insecure relative to men. The magnitude of the gender gap in food insecurity varies across regions and varies by the severity level of food insecurity. In the developed countries of the European Union, women are 4.7 percentage points more likely than men to experience some form of food insecurity. In the poor countries of South Asia and Sub-Saharan Africa, women are two percentage points more likely than men to be severely food insecure. Using a modification of the Blinder-Oaxaca decomposition technique, I find that gender differences in household income, educational attainment, and social networks explain the majority of the gender gap in food insecurity. However, in some regions, namely South Asia and Australia/New Zealand, gender differences in observable characteristics fail to account for gender differences in food insecurity. This analysis suggests that policies that address gender inequality in employment opportunities and educational attainment may also impact food insecurity.  相似文献   

14.
全球化背景下的电信产业标准竞争   总被引:1,自引:0,他引:1  
在经济全球化已成事实的大背景下,国家间在经济上的竞争主要表现为关键产业上的竞争,而产业竞争优势在经济全球化时代则主要表现为产业标准上的竞争。这是因为,经济的全球化要求国际化大分工,国际化分工衍生出的一个主要特性就是网络经济特性,而全球网络经济特性促使产业优势的发展路径从过去的资源优势、创新优势提升到标准优势。本研究认为,在当前产业竞争优势已从创新优势发展为标准优势的条件下,影响标准竞争的网络外部性的真正来源是标准的安装预期水平,而不是传统意义上的安装基础;安装预期在产业政策的推动下可以弥补标准竞争中的创新弱势。  相似文献   

15.
消费契约的双重特性与大企业危机   总被引:2,自引:0,他引:2  
消费契约具有长期契约特征,不但企业对消费者的购买激励具备投资特征,消费者也会在购买过程中形成专用性资产。通过转移成本壁垒,企业和消费者被封闭在一种双边的长期契约关系当中,这种关系造成了消费契约的相对稳定性。但同时由于契约的不完全性,一旦消费者预期专用性资产变为沉没成本,潜在消费者将转投其他企业,造成企业的迅速倒闭。如果大企业不能采取有效措施,小的失误可能会演变成大的危机;由于大企业存在着危机的外部性.因此需要相应的公共政策。  相似文献   

16.
    
  相似文献   

17.
我国于2003年10月召开的十六届三中全会上正式提出了振兴东北老工业基地的口号.吉林省作为东北三省的中心,经济总量占东北三省经济总量的1/3,吉林省经济的崛起是振兴东北老工业基地的关键.投资是经济发展的第一动力,本文创新性的将柯布-道格拉斯生产函数和VAR引进吉林省GDP时间序列回归中,通过分别分析吉林省,广东省和江苏省的投资与产出之间的关系,总结出了吉林省经济与其它两省经济发展规律的差异.提出了针对吉林省经济发展的建议.  相似文献   

18.
Understanding firm heterogeneity is the first step towards explaining the dispersion of profit rates between firms. This paper proposes a framework that distinguishes between three sources of competitiveness, related to three levels of firm heterogeneity, which give rise to industry competencies, strategy-specific competencies and firm-specific competencies. Using data from a Spanish survey we estimate the relative importance of these three sources of heterogeneity. We show that taking the group effect into account significantly differentiates our results from those obtained in previous research. We provide new evidence on the existence of a significant group effect and also an estimate of its relative importance vis á vis firm and industry effects.  相似文献   

19.
    
Hawawini, Subramanian, and Verdin (2003) examined the relative impact of industry‐ vs. firm‐level factors shaping firm performance. They demonstrated that variance in firm performance attributable to industry‐level factors increases, while variance attributable t to firm‐level factors decreases when ‘exceptionally’ higher‐ and lower‐performing ‘outlier’ firms in each industry are excluded. They concluded that previous research underestimated the relative impact of industry‐level factors for ‘average’ firms that make up the bulk of an industry. We take issue with their methods used to identify and exclude outliers as well as their conclusions drawn from such analyses. Rather than excluding true ‘outlier’ firms, we argue that they incorporated an artificial restriction of within‐industry sample variance that almost deterministically led to lower firm and higher industry variance component estimates. We demonstrate this point with a comparable sample of data to which we apply progressively greater restrictions on within‐industry sample variance leading to similar results. Finally, we show that exclusion of firms from a data sample based on commonly understood standards of outlier identification leads to little change in industry and firm variance component estimates compared to full‐sample estimates. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献   

20.
    
This study explores the implications of interfirm status differentials for firm behaviors in corporate takeover transactions. We argue that the more the status differential between two firms is aligned with expectations of their roles embedded in the specific economic activity, the easier it is for them to agree on the appropriate means to reach consensus on the transaction. Using the empirical context of the U.S. corporate takeover market, we found that the greater the status differential between an acquirer and a target, the more positively the market reacts to both the acquirer and the target upon the announcement of the acquisition deal, the more likely it is for the deal to be completed, and the more likely the acquirer is to achieve better post‐acquisition performance. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号