绿色混凝土市场存在及发展因素分析

混凝土及其主要组分水泥生产部门的二氧化碳排放量占全球人工二氧化碳总排放量的5%左右。低环境污染的绿色混凝土市场成为解决经济与环境矛盾的重要方法。除了技术上的创新以外,信息经济学对于不对称信息的研究模型揭示了绿色水泥混凝土市场得以存在并发展的真正原因。由此,为该市场进一步的发展提供了值得借鉴的经济学手段。     

Fundamental disagreement

We document a novel set of facts about disagreement among professional forecasters: (1) forecasters disagree at all horizons, including the long run; (2) the term structure of disagreement is downward sloping for real output growth, relatively flat for inflation, and upward sloping for the federal funds rate; (3) disagreement is time varying at all horizons. We propose a generalized model of imperfect information that can jointly explain these facts. We further use the term structure of disagreement to show that the monetary policy rule perceived by professional forecasters features a high degree of interest-rate smoothing and time variation in the intercept.     

图书馆信息资源建设

建设和优化信息资源是社会发展的迫切需要及我国建设全面和谐和可持续发展社会的必然要求,也是图书馆开展各项工作的基础.本文主要阐述图书馆信息资源建设理论研究的演变,揭示文献资源建设的目标,并分析得出图书馆信息建设的基本原则.     

OPTIMAL MONETARY POLICY WITH THE STICKY INFORMATION MODEL OF PRICE ADJUSTMENT: INFLATION OR PRICE‐LEVEL TARGETING?

I investigate the optimal monetary policy in a New Keynesian macroeconomic framework with the sticky information model of price adjustment. The model is solved for optimal policy, and welfare implications of three alternative monetary policy regimes under this optimal policy are compared when there is a cost‐push shock to the economy. These monetary policy regimes are the unconstrained policy, price‐level targeting and inflation targeting regimes. The results illustrate that optimal policy depends on the degree of price stickiness and the persistence of the shock. Inflation targeting emerges as the optimal policy if prices are flexible enough or the shock is persistent enough. However, the unconstrained policy or price‐level targeting might be preferable to inflation targeting if prices are not very flexible and the shock is not very persistent. The results also show that as prices become more flexible, the welfare loss usually gets bigger.     

浅议“全国公安机关现场勘查信息系统”在新经济形势下的应用

"全国公安机关现场勘验信息系统"是公安机关"金盾工程"和"三基工程"的重点建设项目,是刑事技术现场勘验检查的信息平台,自2009年6月正式建库以来取得了巨大成效。特别是在新经济形势下,该信息系统在铁路公安机关的广泛应用,分析在应用中遇到的问题及解决途径,有利于其作用在铁路公安机关更好地发挥。     

#br# 不对称信息环境下的金融集权与分权*——基于中央政府视角的研究

近年来地方政府在金融管理和金融风险处置上的作用日益被强调,但中央与地方政府的金融管理权责却模糊不清。本文从中央政府的视角,从信息、道德风险以及金融外部性三方面来分析金融管理的集权与分权问题。研究发现在金融集权的模式下,由于地方政府的隐性干预,一国可能会处于高度的金融抑制状态。在金融分权情境下,地方状态信息对一项金融政策制定越重要、信息甄别成本越大,中央向地方政府授权的价值越大,同时中央对地方政府的道德风险容忍度越高。而当引入金融外部性,尤其是金融风险极易跨区域传染的特性时,有着强大的行政控制力和丰富的宏观金融工具的中央政府在协调地区间金融溢出效应,控制系统性金融风险方面相比地方政府具有比较大的优势。因而,本文认为在金融分权的情境下,政策性金融权力的下放并不是一个绝对的放与不放的问题,而是一个金融适度分权问题,即合理地将一系列的政策性金融权力配置给中央与地方政府,寻求最优金融分权结构,守住不发生区域性、系统性金融风险的底线。     

黑龙江省中储粮库物流信息平台建设的对策研究

在黑龙江省中储粮库信息平台建设情况调查和分析研究的基础上,分析了该粮库在物流信息平台建设中存在的问题,并提出相应的解决策略:通过加大物流基础设施的整合和建设力度、完善粮库管理信息系统和仓储系统智能化和科学化管理、加强专业人才的培养等方式,以实现黑龙江省中储粮库物流、商流、资金流和信息流同一平台的管理,更好地促进管理模式和手段的创新。     

Information Technology As A Factor Of Production: The Role Of Differences Among Firms

Despite evidence that information technology (IT) has recently become a productive investment for a large cross-section of firms, a number of questions remain. Some of these issues can be addressed by extending the basic production function approach that was applied in earlier work. Specifically, in this short paper we: 1) control for individual firm differences in productivity by employing a ‘firm effects’ specification, 2) consider the more flexible translog specification instead of only the Cobb-Douglas specification, and 3) allow all parameters to vary between various subsectors of the economy.

We find that while ‘firm effects’ may account for as much as half of the productivity benefits imputed to IT in earlier studies, the elasticity of IT remains positive and statistically significant. We also find that the estimates of IT elasticity and marginal product are little-changed when the less restrictive translog production function is employed. Finally, we find only limited evidence of differences in IT's marginal product between manufacturing and services and between the ‘measurable’ and ‘unmeasurable’ sectors of the economy. Surprisingly, we find that the marginal product of IT is at least as high in firms that did not grow during 1988–1992 sample period as it is in firms that grew.