工程资料在工程建设中的重要性研究

企业如果想要在质量上更上一层楼,就必须对于工程资料予以足够重视。本文以工程资料的作用为切入点,详细论述了其在信息查询、项目监管、项目信息、项目成果以及项目后期建设的作用和意义。     

地震资料叠前深度偏移处理质量控制

叠前深度偏移处理目前已广泛应用于地震勘探资料处理中,被认为是解决复杂地质构造正确成像困难问题较好方法,但其处理成果同时又受多种因素影响,需要在资料处理过程中加以控制。通过分析这些影响因素,提出消除或削减这些影响的方法,达到正确还原地层构造形态的目的。     

The impact of maize price shocks on household food security: Panel evidence from Tanzania

Using three waves (2008/09, 2010/11, 2012/13) of the Tanzanian National Panel Survey, this study investigates the impact of maize price shocks on household food security. Between 2008/09 and 2012/13, calorie intake stagnated for urban households, yet sharply deteriorated for rural households. The latter was driven by a significant decline in the consumption of the major staple maize which showed strongest price hikes among all major food items. Fixed-effects regressions indicate a clear negative relationship between maize prices and average household energy intake. Almost all population groups were found to be negatively affected by maize price shocks, with rural landless households being the most vulnerable group. In particular, a 50 percent rise in maize prices decreases caloric intake for rural (urban) households on average by 4.4 (5.4) percent, and for rural landless households by 12.6 percent. Results further indicate that subsistence agriculture can act as an effective strategy to insure against food price volatility.     

Are USDA reports still news to changing crop markets?

This study investigates whether major USDA reports still provide important news to changing crop markets. The news component of each report, or market “surprise,” is measured as a difference between the USDA estimate and its private expectation in corn, soybeans, and wheat markets. Changes in the relevance of USDA information are assessed by examining changes in the magnitude of market surprises and shifts in the futures price reaction to these surprises, which isolates the impact of each report. The stable size of market surprises over time suggests that competition from alternative data sources has not reduced the news component of USDA crop reports. Increasing price reaction to most reports, including those facing competition from alternative information sources, suggests that value of public information may be enhanced in uncertain markets affected by structural changes.     

中国城镇化对扩大内需影响研究--基于我国省级面板数据的实证

本文在已有研究的基础上探讨城镇化扩大内需的影响,采用省级面板数据模型分析了城镇化扩大内需的影响,进而提出相应的政策建议。实证结果显示,我国城镇化与扩大内需的之间的关系呈现出了U型结构。城镇化扩大内需的效果需要一定的经济社会条件,即区域经济发展水平、产业结构、收入水平和社会保障水平等。区域经济发展水平对内需呈现出负向影响,农民人均纯收入对内需呈现出正向影响。分区域看,东中西部地区城镇化扩大内需的效果差异较大,主要归结于区域经济发展水平、产业结构、收入水平和社会保障水平等方面。基于此,本文从建立健全覆盖城乡的社会保障体系、拓宽农民增收渠道、推动区域产业结构的优化和升级等方面提出相对应的政策建议。     

浅谈如何解决工程资料审查中的“拥堵塞车”

以长庆油气田地面产能建设工程为例,通过对建设各方责任主体在工程竣工资料形成的全过程和送审阶段的现状进行分析,找出了造成在资料送审阶段"拥堵塞车"的各种原因,指出要在建设工程竣工资料的管理中重点发挥建设、监理、检测单位这三方形成的"一体两翼"的主导作用,并提出了相应的改进措施。     

基于 DEA 模型的中国省际经济发展效率研究

科学测度经济发展效率是衡量地区经济增长质量的重要手段。本文以省际面板数据为基础,采用窗口分析法以及 Malmquist 指数研究了中国2000～2009年各省份经济发展效率的区域差异与动态演进特征,并将经济发展效率分解为纯技术效率与规模效率,定位了制约我国省际经济发展效率提升的主要因素,将 Malmquist 生产率指数分解为纯技术效率变化、规模效率变化与技术进步,探讨了我国省际全要素生产率变化的来源。实证分析结果表明：无论从静态还是动态层面,考察期内我国各省份、三大区域经济发展效率呈现比较明显的区域差异性,全要素生产率的提升主要依靠技术进步来驱动。     

Does corporate social responsibility influence the corporate performance of the U.S. telecommunications industry?

This study uses a two-stage approach to explore the relationship between the operational performance of U.S. telecommunications companies and their implementation of corporate social responsibility (CSR). In the first stage, this study adopts the dynamic data envelopment analysis model to measure the efficiency of the telecommunications industry in the U.S. from 2004 to 2008. The empirical results show that the corporate efficiency of those companies that implemented CSR was higher than that of those companies that did not. In the second stage, the study adopts OLS and 2SLS to explore the influence of the execution level of CSR on performance. The results show that the Kinder, Lyndenberg, and Domini & Co (KLD) social ratings indexes are significantly and positively related to corporate performance. Finally, this study suggests ways in which corporate policy makers can enhance CSR in order to improve corporate performance in the U.S. telecommunications industry.     

Food scandals,media attention and habit persistence among desensitised meat consumers

Consumer reactions to food scandals and their resulting economic implication are well documented. However, studies have typically neglected the roles that consumption habits and media usage behaviours may play in explaining household’s response to food safety incidences. In this study we develop a model of heterogeneous media usage intensity, information impacts and decay over time to estimate household’s behavioural responses to the 2011 German Dioxin scandal. We are specifically interested in determining the degree of heterogeneity in household’s short-term adjustments demand patterns versus persisting long-term consumption habits of meat products (chicken and pork) directly affected by the incident. The empirical analysis employs detailed household-level retail scanner and media usage data collected by the GfK Consumer Scan panel for a total of 16,023 households over a period of 104 calendar weeks. Results of dynamic correlated random effect Tobit models indicate an important role of unobserved heterogeneity in explaining household responses during the food scandal. We find strong empirical evidence supporting our hypothesis that short-term marginal adjustments in demand and propensity to buy affected products triggered by the negative impact of household media exposure were over-compensated by habit persistence. The question of how consumption patterns evolve over time in the presence of food scandals is expected to be of interest for both policy makers and the food industry. The potential biases in the projection of economic impacts resulting from simplifying assumptions of household’s response patterns to a proliferating numbers of food safety incidences has implications for risk management and public policy.