太行山区耕地整理适宜性评价及障碍因子诊断——以河北省涞源县为例

[目的]耕地整理适宜性评价是土地整治规划的基础,可以为划定耕地整理重点区域、确定耕地整理项目和整理时序提供依据。[方法]文章以位于太行山区的涞源县为研究区域,以现状耕地图斑为评价单元,经独立性分析后选取地形坡度、表层土壤质地、灌溉保证率、耕地系数、与道路距离、与城镇中心距离、地质灾害易发性7个评价指标,运用贝叶斯概率模型计算各指标权重及未整理耕地的整理后验概率,并得到研究区未整理耕地的适宜性空间分布。同时根据改进的障碍因子诊断模型,分析了各适宜整理区的障碍因子并提出相应的整理措施。[结果](1)在影响涞源县耕地整理的各因素中,影响程度从小到大依次是表层土壤质地、与城镇中心距离、耕地系数、地形坡度、与道路距离、地质灾害易发性和灌溉保证率;(2)在涞源县未整理耕地中,高适宜整理区与较适宜整理区占未整理耕地的20.79%,可作为涞源县下一步耕地整理的选择;(3)制约涞源县全域耕地质量的障碍因子是灌溉保证率,整理过程中应根据实际情况科学寻找灌溉水源、结合地形条件采用蓄、引、提相结合的方式合理布设农田水利设施,提高水资源利用率。[结论]该文可为太行山区更科学合理地开展耕地整理项目提供依据。     

Assessing the historical role of credit: Business cycles,financial crises and the legacy of Charles S. Peirce

This paper provides a historical overview of financial crises and their origins. The objective is to discuss a few of the modern statistical methods that can be used to evaluate predictors of these rare events. The problem involves the prediction of binary events, and therefore fits modern statistical learning, signal processing theory, and classification methods. The discussion also emphasizes the need for statistics and computational techniques to be supplemented with economics. The success of a forecast in this environment hinges on the economic consequences of the actions taken as a result of the forecast, rather than on typical statistical metrics of prediction accuracy.     

Is the unemployment–inflation trade-off still alive in the Euro Area and its member countries? It seems so

The unemployment–inflation trade-off can be interpreted as a proposition concerning the response of these two variables to aggregate demand shocks. In this paper, we study the possible presence of the trade-off in the Euro Area and in a wide group of Euro-area countries in the last 20 years, that is, since the start of EMU. We use the structural VAR methodology that allows the separation between supply and demand shocks. Our main finding is that the existence of a trade-off is largely confirmed both at the Euro Area and at the national level. Nevertheless, the size of the trade-off, measured at different horizons, shows some heterogeneity among countries. No less important, when we augment the VAR model by introducing monetary policy in the context of an open economy, we find that monetary policy shocks push inflation and unemployment in opposite directions in the currency area. Another interesting result concerns the evidence of a relatively flat relation between unemployment and inflation, conditionally to monetary policy shocks. The bulk of these conclusions seem to be confirmed by a number of robustness checks.     

数字经济背景下深圳居民消费结构变迁分析

近年来,伴随着我国电商交易规模的不断增加,数字经济蓬勃发展,逐渐成为改善消费环境、促进经济发展的新引擎。同时,数字经济具有很强的网络效应,可以带动居民消费实现转型升级。本文结合2008—2018年的电商交易规模与深圳消费结构相关数据,从衣、食、住、行等方面分析了居民消费结构的变化趋势。本研究认为居民收入增加、商品价格变动、粤港澳大湾区建设等是影响深圳居民消费的重要因素,最后给出实现深圳居民消费结构升级的相关建议。     

Understanding conflicting perspectives in event planning and management using Q method

There is a need to better understand the interests of actors in the planning and management of major events. The diversity of actor perspectives about an event creates a wicked problem set that event organisers and public officials find difficult to understand, let alone address. This paper focuses on problem identification as one stage in the event planning and management process. It explores how problem structuring can contribute to more effective planning and management of actors' interests. The value of Q methodology is explored through a case study of the Australian World Rally Championship. Four perspectives are identified in the problem structuring process: the Skeptics, the Materialists, the Middle-grounders and the Supporters. The findings demonstrate that Q methodology is effective in identifying the depth and breadth of different problem perspectives, providing insights into the importance of different perspectives, and can be used reflexively to anticipate and manage potential conflict.     

Innovative restaurants in a mass-tourism city: Evidence from Antalya

This paper is about innovative restaurants in the single-asset (sun-sea-sand) mass-tourism city of Antalya, and focuses on the supply side of the restaurant market. The broader aim of the paper is to show that the mass-tourism city of Antalya is more differentiated than one might expect. The specific aim of the paper is to find out what types of restaurants are more innovative than others and in what types of tourism places in the city they are located. The empirical research is based on interviews with 54 managers and chefs, the results of which are analysed with quantitative methods of relational analysis such as correspondence- and chi-square analysis. The main result of the empirical research is that high-quality restaurants, visited by a mix of locals and tourists, and are located in a specific urban places, are most innovative.     

基于钻石模型的滨海新区制造业产业集群发展研究

天津滨海新区升格为国家级综合改革试验区的战略目标,是把以滨海新区为增长极的京津冀打造为环渤海乃至中国北方经济增长的发动机和最具国际竞争力的都市圈。本文借鉴迈克尔·波特的国家竞争优势钻石模型,构建一个地区制造业升级的竞争模型,并借助于这一模型对滨海新区制造业产业集群竞争力进行分析,从而就提升其产业集群竞争力进行了对策探析。     

Structural reforms and fiscal adjustments: policy options for the euro area

This paper analyses the effects of structural reform and fiscal consolidation policies in the Euro Area using a stylized new-Keynesian model. A number of issues are focused upon: (i) the modelling and effects of fiscal consolidation and structural reforms, and (ii) evaluation of alternative reform and consolidation scenarios, including their joint implementation.     

Prediction research on the water quality in the Three Gorges Reservoir Area： a review

对河流水质模型和流域非点源污染模型在三峡库区水质预测的相关研究进行了综述，着重探讨了河流水质模型中水质组分在三峡库区多介质环境的迁移与转化机理．以及流域非点源污染模型在三峡流域污染负荷的研究进展。