综放工作面动态分次加架技术实践

针对一些不规则布置的综放工作面,介绍了当工作面长度变长时,采取不同的布置及加架方式的优缺点。这对于一些储量较少,地质条件复杂的矿井具有很好的借鉴意义。     

How an international ambidexterity strategy can address the paradox perspective on corporate sustainability: Evidence from Chinese emerging market multinationals

Corporate sustainability (CS) is receiving considerable attention from emerging market multinational enterprises (EMNEs), playing an important role in the globalized market. However, theoretical and empirical knowledge about how EMNEs address CS is still scant, and the relationship between internationalization and CS has not been widely explored. This study aims to fill this gap, evaluating the relationship between an international ambidexterity strategy and CS in EMNEs, which highlighted the paradox perspective. Then we develop three hypotheses in which we argue how the dynamic capabilities underpinning international ambidexterity could be considered a driver of CS in EMNEs. We test the developed hypotheses against data from 300 Chinese EMNEs obtained by a survey. Our results contribute to shape ambidextrous international strategies and to consider CS as a springboard for the strategic intent to systematically and recursively outperform global competition. Testing a measurement scale of international ambidexterity, we suggest structural ambidexterity as a strategic option of internationalization that allows the achievement of economic, social, and environmental sustainability objectives.     

A simple characterisation for sustained growth

This article considers an inter-temporal optimisation problem in a general form and gives conditions ensuring the convergence to infinity of the economy. These conditions can be easily verified and applied for a large class of problems in the literature. Some applications for different economies are given as illustrative examples.     

探讨基础设施PPP项目的全生命周期的动态项目管理

当前,PPP模式不仅在我国基础设施建设中发展前景良好,同时在很多国家得到了广泛应用。相比传统的工程项目建设模式,PPP项目具有风险因素复杂和风险较大的特征,因此,PPP项目的成功会在很大程度上受动态项目管理的有效性影响。对项目管理来说,尤其是动态项目风险管理,应贯穿于PPP项目的全生命周期,而只有实现全生命周期的动态风险管理,才能使PPP模式在我国基础设施建设领域中成功利用。     

制度变迁下国有商业银行农村服务网络演化——以农业银行兰考县支行为例

经济转轨背景下农村的银行服务网络呈现出不同于城市的演化特征。从制度变迁角度建构分析框架,基于历史、调查与访谈数据,以农业银行兰考县支行为例,探讨我国商业银行农村服务网络演化动力机制。研究表明:国有商业银行农村服务网络经历了恢复成立后的快速扩张和密集的人工网点服务,市场化改革中农村业务收缩和大规模网点撤并,到新时期人工、自助、电子、代理等多元服务渠道扩张;农村银行服务网络演化是商业银行和制度环境相互作用的空间过程,普惠金融战略下我国特别强调金融服务的均等化和基础金融网点的全覆盖,商业银行不断借助新的伙伴关系开拓农村市场,其中合作代理日益发挥重要作用。不同地区、不同商业银行农村服务网络模式的差异,农村银行服务网络转型对农村社会经济发展、金融生态环境改善、农民金融素养提升的影响等还需进一步研究。     

经济密度、人口规模与环境污染——基于城市面板数据的实证分析

选取2005-2016年285个地级及以上城市数据,利用静态和动态短面板模型分析经济密度和人口规模对环境污染的影响,分析表明:经济密度与环境污染之间存在“倒U型”关系,人口规模扩大会抑制污染物排放;不同等级城市经济密度、不同规模城市人口对环境污染的影响方向一致,但影响程度有所差异;前期污染排放对当期具有正向影响,环境污染物排放存在路径依赖;经济发展水平、工业产值占比和对外开放也是影响污染物排放的重要因素,但各指标对三类污染物排放的影响方向和影响程度存在差异。据此认为,在综合考虑城市具体空间区位条件下,人口适度集聚,提高城市经济密度,优化产业结构以及加强环境监管是环境治理的重要方向。     

Internationalization through foreign listing: A review and future research agenda

This paper reviews and synthesizes literature on foreign listing from international business, management, and finance disciplines. A systematic review of 66 studies from 25 journals indicates fragmentation of the literature across the macro and firm-specific perspectives and a limited usage of current international business theories in research on foreign listing. We propose multiple developmental paths including use of institutional theory, especially institutional distance and institutional evolution to provide more comprehensive understanding of antecedents and contingent factors for foreign listing; supply-chain disaggregation of cross-border capital flow; integrate financial and strategic implications of foreign listing; and advancement of emerging market specific theories.     

集体林区资源异质性农户林业生产行为动态特征及差异研究——以湖南省为例

分别以商品林农户、公益林农户和兼有林农户作为研究对象,采用描述性分析从林业生产过程和投入产出两个维度客观揭示3类农户林业生产行为动态特征及差异。打破将林区农户作为同质整体的传统假设进行研究的结果表明:商品林、公益林和兼有林农户林业生产行为整体趋势比较积极,但在造林、管护、采伐行为及林业投入产出等方面存在明显差异。因此,建议通过政策引导、市场调剂等方式形成商品林、公益林差异化经营优势,确保农户利益的同时,更好的贯彻森林分类经营管理理念,维护国家生态安全。     

美国学前教师职前培训体系演进之路省思与启示

美国是世界上学前教育最发达的国家之一,非常重视学前教育师资的培训和质量的提高,高素质的幼教师资主要通过职前培训这个途径来实现。本研究对美国学前教师职前培训体系发展历程进行了梳理,分为学徒制时期、培训学校时期、师范学校时期、师范学院时期和综合大学的教育学院和文理学院的教育系时期。反思不同时期美国学前教师职前培训的经验与教训,结合我国国情,在培训目标、课程设置、质量保障机制、教育实践等几个方面对我国学前师资的职前培训体系进行展望。     

Impact of oil price changes on Turkey’s exports

Substantial decline in oil prices observed since the second half of 2014 has brought forward discussions on the impact of oil prices on the external balance. This decline is expected to shift real income from oil exporter countries to oil importer countries. In this context, we study the effect of change in oil prices on Turkey’s exports taking into account the fact that Turkey’s export to oil exporting countries has approximately one-third share in total exports, while export to oil importing countries has a share of two-thirds. At the first step, we analyse the effect of oil prices on economic growth of trade partners of Turkey, where countries are grouped according to their net oil export position. We find that the effect of oil prices on different country groups’ growth is asymmetric. In the second stage, for two groups of countries, we estimate growth-export elasticity through Turkey’s export demand function. Finally, we calculate the net effect of oil prices on exports considering different income effects caused by oil price change on each country groups. Results indicate that the net effect of oil prices on the exports is limited given the current export shares.