Is participation in agri-environmental programs affected by liquidity and solvency?

Financial constraints, both in the short and long run, have an impact on economic well-being of farm families. Additionally, financial constraints have an impact on production efficiency and technology adoption. This study investigates factors affecting farmers’ participation in the agri-environmental programs like Conservation Reserve Program (CRP) and the Environmental Quality Incentives Programs (EQIPs) in the U.S. particular attention is given to the roles of liquidity and solvency on participation in CRP and EQIP. Results show that both liquidity and solvency have a negative impact on participation in such programs. Additionally, we found that access to the Internet plays an important role in the farmer's decision to participate in CRP and EQIP. Our results also suggested that beginning farmers are more likely to participate in EQIP program.     

扎龙自然保护区早春三条观鸟路线鸟类资源调查评价

扎龙自然保护区的3条观鸟路线共观察记录鸟类66种，其中国家Ⅰ级保护鸟类3种，Ⅱ级7种，省级保护鸟类5种；夏侯鸟49种；古北界种类45种、广布种19种、东洋界2种。路线A的鸟类多样性最高。路线B是比较理想的早春观鸟路线。     

洪河自然保护区丹顶鹤秋季觅食生境初步研究

2005-10-12～21对洪河自然保护区秋季丹顶鹤的觅食生境采用因子测定法,对栖息地进行了觅食生境的研究,包括植物高度、植物密度、植物盖度、水深、水流、人为干扰等。对丹顶鹤觅食生境进行样方测定。结果表明洪河自然保护区的植物盖度为49.50%,植物密度为491株/㎡。根据对野外调查数据用标准差分析以及平均值比较等数学方法处理,得出了以下结论:丹顶鹤喜好在植物高度60-120cm,植物盖度低于75%,植物密度在600棵/㎡的左右生境中觅食,距人类活动场所的距离大于500m的生境中觅食。本研究为保护丹顶鹤栖息地提供重要的依据。     

Cost-Effective Targeting of Land Retirement to Improve Water Quality with Endogenous Sediment Deposition Coefficients

An integrated framework that combines spatial and biophysical attributes of land with a hydrological model and an economic model is developed to identify cropland for enrollment in the Conservation Reserve Enhancement Program. Sediment deposition coefficients are determined endogenously depending on the land-use decisions on other land parcels. Application of this framework to a watershed in Illinois demonstrates that highly sloping land adjacent to water bodies should be selected for retirement. A marginal value rental payment scheme can achieve program goals of 20% sediment abatement at 39% lower cost than a productivity-based rental scheme.     

大零岭自然保护区植物资源的开发利用

介绍了大零岭自然保护区植物资源的特点，分析了开发利用的方向，提出了利用和保护的建议。     

新西兰储备银行的流动性监管新政策及启示

金融危机后,新西兰储备银行致力于加强银行体系流动性的审慎监管,近期对商业银行推行核心融资比率,此项新型流动性监管政策被称为继通胀目标制之后,新西兰储备银行首推的又一项新的货币政策工具。本文对其推出背景、总体框架及作用进行了研究,并在此基础上提出对我国银行流动性监管的启示。     

准备金率和资本充足率影响商业银行贷款规模的机制分析

货币银行传统理论认为:货币当局以准备金率控制贷款规模,以资本充足率控制贷款风险。本文从分析准备金与资本充足率对贷款规模的约束机制入手,引入银行资产负债表模型,证明银行贷款规模主要受资本充足率影响。研究结论是:准备金率对贷款规模的控制作用已经弱化,资本充足率对贷款规模的控制作用趋强。     

投标人平行串谋与最优公开保留价博弈分析

本文将投标人平行串谋问题与招标人公开保留价定价策略相结合,研究了第二价格密封招标方式下投标串谋联盟的串谋报价及利润分配机制,分析了串谋联盟的存在对非串谋联盟中成员的投标策略和期望利润的影响,揭示了串谋联盟成员人数与串谋联盟总收益之间的关系,探讨了招标人公开保留价定价策略、串谋联盟成员人数与招标公开保留价之间的关系,指出了招标人应通过降低公开保留价的方式来防止或减少投标人平行串谋行为的发生。     

Commodity futures contracts: Furnishing an elastic currency in the nineteenth century

In this paper, I show that nineteenth century US interest rates are relatively more volatile before 1874 and I propose, and demonstrate how, commodity futures trading is the likely principal proximate explanation for this change in behavior. Borrowing from Turnovsky [Econometrica 51 (1983) 1363], I model the optimizing behaviors of risk averse producers and risk neutral speculators in the absence and presence of futures contracts and I show that, so long as one party to a futures contract was risk averse, futures markets would have quelled interest rate volatility caused by variations in planting and harvesting conditions.     

城市土地储备运作机制现状与优化探讨

通过对我国城市土地储备运作机制的分析，指出其取得的成效与存在问题，并从构建城市土地一级市场竞争供给，通过盘活存量土地促进土地市场化交易，建立土地储备制度阶段性目标三方面优化土地储备机制。