不同配筋率的钢筋混凝土阻尼性能的实验研究

混凝土的阻尼功能对于提高结构稳定性、安全性和耐久性以及防震减灾等具有重要意义。本文通过试验模态分析法对不同配筋率的钢筋混凝土梁在其各阶固有频率下的阻尼性能进行了研究,结果表明随着配筋率的提高,钢筋混凝土构件的阻尼比是不断减小的。研究构件在自由振动下动态特性对于混凝土结构抗震设计有参考价值。     

Welfare Effects of Foreign Direct Investment: Cost Saving vs. Signaling

We compare the effects of two types of foreign direct investment (FDI) (viz., FDI for trade cost saving and FDI for signaling foreign cost of production) on consumer surplus, profit of the host-country firm and host-country welfare. We show that the effects are dramatically different. If the reason for FDI is to save trade cost, FDI (compared to export) always makes the consumers better off and the host-country producer worse off, while the effect on host-country welfare is ambiguous. However, if the FDI is to signal the foreign cost of production, FDI (compared to export) always makes the host-country producer better off and increases host-country welfare, while it makes the consumers almost always worse off.     

河北省上市公司负债经营与公司绩效的联动关系探析

负债经营问题是具有重大理论价值和实践意义的研究课题。文章采用资产负债率作为负债经营指标来反映公司的资本结构,以净资产收益率（ROE）来反映上市公司绩效,结合河北省上市公司年报数据,通过实证分析来说明河北省上市公司负债经营与企业绩效的联动关系。     

基于房价租金比的居民住房投资风险实证分析

房价租金比是衡量房地产市场泡沫的重要指标之一,目前房价租金比的研究往往以区域为研究对象,计算区域平均的房价租金比,用来判断区域的居民住房投资的风险状况。本文基于房价租金比理论,从居住消费者对房产的租买选择的角度,以区域为研究对象,使用统计部门通用的抽样采集数据方法,计算每个样本所在区域的房价租金比,得到房价租金比的区域空间分布。最后,本研究以北京为案例,对北京八大城区进行抽样,测算出当前北京各城区房价租金比,对北京各城区居民住房投资的风险状况进行对比分析。     

我国上市公司财务危机预测指标体系的述评与选择

本文回顾了国内外具有代表性的文献,对其使用预测指标的频数与样本数进行统计,结合锐思数据库取得的数据,得出我国上市公司财务危机预测备选指标体系,具有较好的适用性、可靠性、客观性与有效性。同时,本文指出文献中的一些不足之处,并给出改进建议。     

长江三角洲对外开放的区域差异及成因分析

选择出口依存度和资本依存度2个指标构建对外开放度指数,对长江三角洲15个城市的对外开放度进行测算.结果表明,长江三角洲各市的对外开放度差异很大,可以划分为3个层次:高开放度城市(苏州、上海、宁波、无锡)、中等开放度城市(嘉兴、杭州、绍兴、南京、常州、南通)和低开放度城市(舟山、湖州、镇江、扬州、泰州).造成长江三角洲对...     

“传销”解析

传销是我国屡禁不止的一种违法营销活动,为有针对性加以防范和取缔,必须解析其本质、特点、原因。     

Joint outputs and real wage rates

The magnification effect in standard international trade theory asserts that if the relative price of the labor-intensive commodity increases, the real wage will also increase, as will the wage/rental ratio. This result depends upon the assumption that both activities are nonjoint—each combining labor and capital to produce a single output, so that if activities are joint instead, the results are in jeopardy. It is shown that if the difference between the share of commodity one produced in the first activity and in the second activity exceeds the difference between the labor distributive shares in the first activity and the second, an increase in commodity 1's relative price raises the wage/rental ratio. The real wage unambiguously rises in this case if and only if the ratio of the commodity output shares in the two activities exceeds the ratio of labor shares.     

The cost of diabetes and obesity in Australia

Aims: To assess and compare the direct healthcare and non-healthcare costs and government subsidies by body weight and diabetes status.

Methods: The Australian Diabetes, Obesity and Lifestyle study collected health service utilization and health-related expenditure data at the 2011–2012 follow-up surveys. Costing data were available for 4,409 participants. Unit costs for 2016–2017 were used where available or were otherwise inflated to 2016–2017 dollars. Age- and sex-adjusted costs per person were estimated using generalized linear models.

Results: The annual total direct cost ranged from $1,998 per person with normal weight to $2,501 per person with obesity in participants without diabetes. For those with diabetes, total direct costs were $2,353 per person with normal weight, $3,263 per person with overweight, and $3,131 per person with obesity. Additional expenditure as government subsidies ranged from $5,649 per person with normal weight and no diabetes to $8,085 per person with overweight and diabetes. In general, direct costs and government subsidies were higher for overweight and obesity compared to normal weight, regardless of diabetes status, but were more noticeable in the diabetes sub-group. The annual total excess cost compared with normal weight people without diabetes was 26% for obesity alone and 46% for those with obesity and diabetes.

Limitations: Participants included in this study represented a healthier cohort than the Australian population. The relatively small sample of people with both obesity and diabetes prevented a more detailed analysis by obesity class.

Conclusion: Overweight and obesity are associated with increased costs, which are further increased in individuals who also have diabetes. Interventions to prevent overweight and obesity or reduce weight in people who are overweight or obese, and prevent diabetes, should reduce the financial burden.     

The impacts of bank-specific and macroeconomic variables on the capital adequacy ratio: evidence from Islamic banks

The study investigates the relationship between the capital adequacy ratio (CAR) and different bank-specific and macroeconomic variables for 28 Islamic banks. We document that there is a statistically significant positive relationship between the CAR and the bank-specific and macroeconomic variables. In particular, bank-specific variables such as ROA, ROE, leverage, credit risk and size show a strong association with the CAR, while on the macroeconomic side, inflation, market capitalization and exchange rate have an impact on the average Islamic bank in our sample study. Furthermore, we run another model (equity to assets ratio) as dependent, with similar control variables, and the results reveal that, except for inflation, all the variables that have a significant effect on the CAR also influence the equity to assets ratio.