集值函数及向量值函数的两类线性算子逼近

本文得到了利用插值型线性算子列及积分型算子列逼近连续集值函数及连续向量值函数的收敛逼近阶。     

无界时滞中立型系统(非Razumikhin型)的稳定性

本文利用 Liapunov 函数法,建立无界时滞线性和非线性中立型系统(非 Razumikhin 型)稳定性的简单判据。     

Back on the balance sheet: The tax effects of contingent claims in commercial banking

Contingent claims separate revenue and cost into two different time periods. Revenue comes in the initial origination process, while the cost comes upon completion of the contract in the event of default. With banks increasing contingent claims in recent years, a higher taxable income leads to a shift in a bank's balance sheet toward tax-free income and tax-shielding liabilities. This provides a valuable case-study of corporate finance theories of tax management. This paper builds a model to illustrate the income features of contingent claims. Call Reports from 1990-1996 are examined, and show significant evidence of increases in leverage associated with contingent claims.     

Estimating the Euler equation for output

New Keynesian macroeconomic models have generally emphasized that expectations of future output are a key factor in determining current output. The theoretical motivation for such forward-looking behavior relies on a straightforward generalization of the well-known Euler equation for consumption. In this paper, we use maximum likelihood and generalized method of moments (GMM) methods to explore the empirical importance of output expectations. We find little evidence that rational expectations of future output help determine current output, especially after taking into account the small-sample bias in GMM.     

胜利油田集输系统常见腐蚀研究

分析了胜利油田集输系统常见的腐蚀类型和腐蚀机理，分别阐述了各种局部腐蚀的防护措施，并综合对比了各种防腐方法的优缺点．指出根据不同区块的实际腐蚀环境、介质及工艺条件，因地制宜、有的放矢地制定经济、合理的防腐措施是减缓和控制腐蚀的有效途径。     

Corruption, inequality, and fairness

Bigger governments raise the possibilities for corruption; more corruption may in turn raise the support for redistributive policies that intend to correct the inequality and injustice generated by corruption. We formalize these insights in a simple dynamic model. A positive feedback from past to current levels of taxation and corruption arises either when wealth originating in corruption and rent seeking is considered unfair, or when the ability to engage in corruption is unevenly distributed in the population. This feedback introduces persistence in the size of the government and the levels of corruption and inequality. Multiple steady states exist in some cases.     

Technology improves sales performance—doesn't it?: An introduction to the special issue on selling and sales technology

Firms around the globe are rushing to invest in sales force technology or sales force automation (SFA). SFA appears to mean different things to different people. For example, management and sales personnel view the need for, application of, and advantages of SFA quite distinctly. As a result of technology, this special issue examines many areas of sales force automation to provide both practicing managers and sales force academicians with a clearer perspective of new technology in the B2B marketplace. This article introduces the special issue topic, individual contributors, and acknowledges support proffered by myriad individuals.     

The consequences to analyst involvement in the IPO process: Evidence surrounding the JOBS Act

The JOBS Act allows certain analysts to be more involved in the IPO process, but does not relax restrictions on analyst compensation structure. We find that these analysts initiate coverage that is more optimistically biased, less accurate, and generates smaller stock market reactions. Investors purchasing shares following these initiations lose over 3% of their investment by the firm's subsequent earnings release. By contrast, issuers, analysts, and investment banks appear to benefit from this increased bias, as optimism is more positively associated with proxies for firm visibility and investment banking revenues when analysts are involved in the IPO process.     

Monetary Policy,Trend Inflation,and Unemployment Volatility

The literature has long agreed that the DMP model (after Diamond 1982, Mortensen 1982, Pissarides 1985) with search and matching frictions in the labor market can deliver large volatilities in labor market quantities, consistent with empirical data, only if there is at least some wage stickiness. I show, however, that the model can deliver nontrivial volatilities without wage stickiness, as long as it has price dispersion and nonzero long‐run inflation rates. I find that by keeping inflation at a positive rate, monetary policy may be accountable for the large standard deviations observed on labor market variables. In addition, the Shimer (2005) puzzle disappears under monetary policy shocks.     

Examining the disclosures on the websites of English credit unions

This paper examines the disclosures made on English credit unions’ websites. Credit unions without a website are presumed to be small. Community credit unions with websites tend to offer basic services with a limited range of products that may appeal to poorer members of society. Occupational credit unions appear more likely to have a greater range of products.