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。     

校企合作模式对学生体质健康影响的动态分析

以福建卫生职业技术学院2011级与2012级学生为研究对象,运用文献资料法、测试法、实验法和数理统计法等,对校企合作模式下体育课程改革前后学生体质健康数据进行对比分析,结果显示：说明体育课程设置与大学生体质健康密切相关,特别在耐力素质、腹肌耐力、上肢力量影响很大,呈显著差异.对此提出加强对学生体育课学习需求的调查、加快体育教学改革中体育课教学内容和课程体系的改革、改善体育教学条件、完善“课内外一体化”模式,希望在校企合作改革的大背景下,能为顺应高职高专人才培养模式制定科学、合理的体育课程改革提供有力的依据.     

Bond Pricing with a Time‐Varying Price of Risk in an Estimated Medium‐Scale Bayesian DSGE Model

New Keynesian model in which households have Epstein–Zin preferences with time‐varying risk aversion and the central bank has a time‐varying inflation target can match the dynamics of nominal bond prices in the U.S. economy well. The model generates a large steady‐state term spread and its fitting errors for bond yields are comparable to those obtained from a nonstructural three‐factor model, and one‐third smaller than in models with a constant inflation target or risk aversion. Including data on interest rates has large effects on variance decompositions, making investment technology shocks much less important than found in other recent papers.     

Lumpy Investment and Corporate Tax Policy

In the presence of both convex and nonconvex capital adjustment costs in a dynamic general equilibrium model, corporate tax policy generates both intensive and extensive margin effects via the channel of marginal Q. Its impact is determined largely by the strength of the extensive margin effect, which, in turn, depends on the cross‐sectional distribution of firms. Depending on the initial distribution of firms, the economy displays asymmetric responses to tax changes. Moreover, an anticipated increase in the future investment tax credit reduces investment and adjustment rate initially.     

数字化推动乡村振兴的机制、路径与对策

数字经济的多维要素是实现乡村振兴的重要抓手。文章基于我国31个省份2015—2020年的面板数据,采用动态QCA的方法对数字经济驱动乡村振兴的影响因素和组态路径进行实证研究。研究表明：数字经济的单一要素并不构成驱动乡村振兴的必要条件,但数字普惠金融的重要性逐年增加,呈明显的时间效应。组态分析发现：数字经济驱动乡村振兴存在“技术−组织规划型”和“技术−产业联动型”两条路径;时间维度上,两条路径的重要性除2017年有所下降外,其余年份总体呈上升趋势;空间维度上,东部地区主要遵循“技术−组织规划型”路径,中西部地区主要遵循“技术−产业联动型”路径,呈现明显的地区差异。最后提出持续推进乡村数字普惠金融的布局与发展,不断优化乡村数字治理体系和提升治理能力,促进数字技术要素与乡村产业的深度互融互嵌。

     

Risk-Taking Behavior and Capital Adequacy in a Mixed Banking System: New Evidence from Malaysia Using Dynamic OLS and Two-Step Dynamic System GMM Estimators

This study is the first attempt to investigate the relationship between the level of risky assets and capital level in a mixed Malaysian banking system covering 83 months starting December 2006. The results of dynamic ordinary least squares indicate positive relationship between capital ratio (CAR) and risk-weighted asset ratio (RWA) in the long run. Furthermore, the causality analysis based on panel vector error correction model (VECM) and two-step dynamic system generalized method of moments indicates unidirectional causality from CAR to RWA. Our results further suggest that higher capital growth and capital buffer provide an extra cushion for the Malaysian banks to pursue relatively riskier financial activities, and the nature of risk-taking behavior of Islamic banks follows that of the conventional banks.     

区域经济合作的动态演化路径与治理机制研究——一项基于泛珠三角区域经济合作的制度分析

区域经济合作进程自身的动态演化路径是逻辑自洽的,当前泛珠三角地区存在的次区域跨边界经济合作现象,是实现区域经济一体化的路径选择和过渡战略。在正视区域发展落差与借助比较优势互补的基础上,推动泛珠三角整合的外源性动力是谋划区域的对外经济战略。在考察双方区域经济合作的可行性方面,成本收益的分配日益成为双方推进合作的重要考虑因素。     

信贷、保险、“信贷+保险”的扶贫效果比较研究

农村金融是农村经济发展的重要内生动力,创新金融扶贫体制对我国农村深度贫困地区的脱贫攻坚工作具有重要意义。本文基于多重均衡模型,对比研究信贷、保险、"信贷+保险"三类金融产品的扶贫效果,在不同的信贷和保险产品结构下得出陷贫概率,进而得出金融扶贫产品的精准设计,以创新金融扶贫体制,从而解决我国深度贫困的问题。研究表明:单独信贷产品扶贫无效;保险能够帮助阈值以上人群摆脱潜在贫困,但对深度贫困无效;"信贷+保险"能解决一定程度的深度贫困问题,比单独信贷或单独保险的扶贫效果更好。     

Theory-Driven Choice Models

We explore issues in theory-driven choice modeling by focusing on partial-equilibrium models of dynamic structural demand with forward-looking decision-makers, full equilibrium models that integrate the supply side, integration of bounded rationality in dynamic structural models of choice and public policy implications of these models.     

Convergence Rates to Output Growth in a Global World: The Roles of Openness and Government Size

In this article, we examine the effects of three openness measures on 54 industrial and emerging economies' output growth over the “globalization years” of 1986–2004. Controlling for standard determinants of the Solow growth model in panel data, we find positive effects of openness on real output growth. While we find support for higher convergence rates under the open economy, the convergence rates in this article for both samples are remarkably close to the 2% level documented in Mankiw et al. (1992) Mankiw, G., Romer, D. and Weil, D. 1992. A Contribution to the Empirics of Economic Growth. Quarterly Journal of Economics, 107(2): 407–437. [Crossref], [Web of Science ®] , [Google Scholar]. The inclusion of G/Y, however, reduces the speed of convergence more substantially in industrial economies.