铜陵市水污染治理的调研

文章通过对铜陵市江河水质、湖泊水质、饮用水水源、污水排放量、酸雨以及地下水质情况等进行调研,调研指标反映铜陵市水污染治理难度大、任务重。铜陵市水污染治理主要存在污水处理资源分散、没有形成规模效应、管理体制不顺、投资结构失衡、监管不力等问题。为此,本课题组提出建立铜陵市排水集团公司、加大对排水管网等基础设施投入以及健全水污染防治监管体制等政策建议。     

Valuing improvements in urban water security: evidence of heterogeneity derived from a latent class model for eastern Australia

In many Australian cities the response to drought has included the imposition of mandatory constraints over how water is used by households, often termed ‘water restrictions’. A similar rationing approach has been witnessed in California’s recent drought. The aim of water restrictions is to slow the depletion of water storage but restrictions have also been criticized for the costs they impose on specific water users. In order to gain insight into the potential magnitude of the cost of water restrictions, this study uses a choice experiment to investigate the non-market values for specific attributes associated with the outcomes of drought restrictions. This information was sought to understand the community’s willingness to pay for attributes related to the extent, frequency and duration of water restrictions. The article reports a latent class choice model for a major city in eastern Australia and investigates heterogeneity in preferences towards increasing water availability during drought. This study departs from the existing literature by conducting the choice experiment in a context where water supply is relatively abundant. This unique framing of the choice experiment allows for a useful comparison with existing studies and also raises challenges about the interpretation of the data for planning purposes.     

信息化对区域创新能力的影响——马太效应存在吗

分析了信息化影响区域创新能力的机理，从信息化资本水平、信息化产业水平和信息化应用水平来测度区域信息化水平，基于2003-2015 年中国29 个省区的面板数据，构建了双固定效应模型，采用LSDV 和GMM 法，实证检验了信息化对区域创新能力的影响以及两者关系的地区差异。结果显示：总体上信息化促进了中国区域创新能力提升，中西部地区信息化对区域创新能力的推动效用明显大于东部地区。这表明，信息化发展并未造成区域创新能力的马太效应。加快推进信息化战略不仅有助于进一步增强中国区域创新能力，而且对于缩小区域创新差距、促进区域协调发展亦有积极意义。     

农业水循环与水环境遥感应用研究进展

农业生产受环境因素影响大,进入农耕文明以来,农业对气候的高度依赖局面没有得到根本性的改变,频繁的自然灾害给我国的农村经济发展造成了极大的困难。遥感技术是运用各类非接触的主被动的探测设备,对地面目标物的电磁波辐射与反射特性进行探测,通过其特性分析,探明其物体性质、特征及状态的综合性探测技术。它具有覆盖面积广、空间分辨率高、获取信息大、重访周期短等优点,适用于农业资源调查与自然灾害监测等农业相关领域的研究,对农业生产的指导与相关部门的决策管理意义重大。文章主要针对国内遥感技术在农业水循环与水环境的发展、应用现状进行综述与分析,并对遥感技术在农业水资源领域的发展趋势进行展望。     

Earnings Management through Specific Accruals and Discretionary Expenses: Evidence from U.S. Agribusiness Firms

This study examines both accruals based earnings management (AEM) and real earnings management (REM) in U.S. agribusinesses. In particular, the focus is on agribusinesses that report low earnings quality, defined as firms with extreme level of accruals compared to their peers. The cross‐sectional modified Jones model (Jones 1991; Dechow et al 1995) is used to test for AEM. To capture REM practices, we implement the discretionary expenses model by Roychowdhury (2006). We find evidence of AEM and find no evidence of REM in agribusinesses. In addition, our results show that managers might be managing earnings through specific accruals doubtful accounts receivable provisions and special items.     

The organization of the future: Unity of marketing and strategy

Marketing and strategy, while once diverse activities and entities, are moving ever closer together—in this paper it is speculated that they may someday become one. This is in response to changing business environments, and to the emergence of new organizational forms. However, a more fundamental force may be the simple recognition that without relationships there is no need for strategy, and that relationships are fundamental to marketing.     

Reserves and Baskets

We discuss three well known plans that were offered in the twentieth century to provide an artificial replacement for gold and key currencies as international reserves: Keynes’ Bancor, the SDR and the Ecu(predecessor to the euro).The latter two of these reserve substitutes were institutionalized but neither replaced the dollar as the principal medium of international reserve.     

The welfare effect of income tax deductions for losses as insurance: Insured- versus insurer-sided adverse selection

Kaplow (1992) shows in a complete-information environment that allowing income tax deductions for losses as partial insurance is undesirable in the presence of private insurance markets. This paper elaborates on Kaplow's finding by studying two extreme types of asymmetric information structures in private insurance markets: Either the insured or insurers possess superior information. It is shown that our derived result is consistent with Kaplow's if the insured have superior information; however, Kaplow's negative conclusion with respect to the income tax deduction will be overturned if insurers have superior information instead. A policy implication from our finding is that whether or not to allow an income tax deduction for losses needs to be more refined and, specifically, it should be tailored to the “adverse selection” information structures of private insurance.     

Inflation Developments and Perceptions after the Euro Cash Changeover

Abstract. This paper analyses the evolution of inflation and of consumers' inflation perceptions in the aftermath of the euro cash changeover. It finds that the cross‐country variation of food product inflation was dependent on the complexity of conversion rates, with statistically significant and economically sizeable effects especially for low‐priced items sold in midpriced stores. The paper also shows that cross‐country differences in the mismatch of perceived and actual inflation were linked to differences in the complexity of conversion rates. These results are in line with theories of finite information‐processing capacities on the side of consumers.