交通运输行业超限超载与黑车治理困境及突围——来自赏金猎人制度的借鉴

交通治理现代化是交通强国建设的重要支撑。交通运输行业超限超载与黑车现象屡禁不止的现实困境,一方面源于早期制度设计阶段遗留的逻辑障碍,一方面源于目前缺乏行之有效的规则来对此类问题进行限制和制约。尽管各级政府对黑车治理高度重视并采取了多种措施,但依然存在黑车辨识难、管理成本高、效率低等问题,尚未达到我国现有施政路线的要求。鉴于此,可抓住管理型政府向服务型政府转型的契机,遵循合法、合理、高效、经济的原则,通过比较分析美国赏金猎人制度来形成制度改革的借鉴。赏金猎人模式作为国外长期摸索得到的经验,有很多值得参考之处。现阶段,赏金猎人模式在我国已经具备试行的基础条件,不仅能够开拓视野,为当前我国面临的交通运输行业治理问题提供制度层面的启示,而且更为重要的是,能够为解决我国超限超载与黑车治理问题提供新的思路。当然,为避免简单借鉴或全盘照搬而导致的水土不服等落地性难题,需要围绕黑车治理困境和超限超载运输这两个具象背景,对不同国别法律解释上的差异加以创新并实现本地化,使之在立法层面稳固的前提下展示其优越性。     

Destabilizing role of futures markets on North American hard red spring wheat spot prices

The objective of the paper is to determine if the futures prices of hard red spring wheat (HRSW) have stabilizing or destabilizing impact on spot HRSW price in North America. Several important results emerge from thorough empirical analysis. First, both Granger causality tests and directed acyclic graph algorithms (DAGs) point to two-way causality between futures and spot HRSW prices and thus endogeneity in both prices formation. To the contrary, both procedures suggest that ending stocks are exogenous to spot and futures HRSW prices. Both vector error correction model and impulse response functions point to a large and long-lasting impact of a shock to futures price on spot price level. Finally, variance decomposition analysis indicates that futures prices are responsible for the bulk of spot price volatility in both short and long run. Our result is consistent with those of theoretical models suggesting that when production (supply side) is the dominant disturbance, spot price is destabilized in both the short and the long run by futures prices. An important implication of this research is the need for alternative market mechanisms or alternative farm policy measures that would mitigate price risk and ensure sustainable farming of American HRSW farmers.     

Equilibrium concepts for time‐inconsistent stopping problems in continuous time

A new notion of equilibrium, which we call strong equilibrium, is introduced for time‐inconsistent stopping problems in continuous time. Compared to the existing notions introduced in Huang, Y.‐J., & Nguyen‐Huu, A. (2018, Jan 01). Time‐consistent stopping under decreasing impatience. Finance and Stochastics, 22(1), 69–95 and Christensen, S., & Lindensjö, K. (2018). On finding equilibrium stopping times for time‐inconsistent markovian problems. SIAM Journal on Control and Optimization, 56(6), 4228–4255, which in this paper are called mild equilibrium and weak equilibrium, respectively, a strong equilibrium captures the idea of subgame perfect Nash equilibrium more accurately. When the state process is a continuous‐time Markov chain and the discount function is log subadditive, we show that an optimal mild equilibrium is always a strong equilibrium. Moreover, we provide a new iteration method that can directly construct an optimal mild equilibrium and thus also prove its existence.     

坚强智能电网的低碳效益与贡献率量化分析

基于低碳发展理念,我国政府已提出2020年减排目标。电网作为能源产业链的重要环节,在促进低碳发展中发挥着关键的、不可替代的作用。归纳分析了坚强智能电网促进低碳发展的各项潜在能力,采用由低碳能力到低碳效益的测评技术路线,对坚强智能电网的低碳效益进行了详细评估,分析了其低碳效益对国家减排目标的贡献率。     

新时期英语广告语谚语模因的复制与传播效果研究

在英语广告中,谚语是一种非常有效的表现形式。广告语言的研究,可以从不同的视角进行探讨。本文以模因论为理论框架,以国内外模因学的研究成果为依据,结合大量实例,分析了谚语强势模因在英语广告中被成功复制和传播的方式及其传播的效果,从而为广告创作者利用谚语强势模因增强广告效应提供了一些有益的思路。     

强混响背景下LFM信号回波检测

混响是主动声纳检测的主要背景干扰,由于它是一种非平稳的有色噪声,使得工作在白噪声条件下的检测器性能受到极大限制。在混响背景下实现目标回波检测,常采用自回归（AR）模型对宽带回波预白化处理,但在强混响背景条件下,白化后直接进行匹配滤波检测的结果不甚理想。针对此问题,在AR模型预白化基础上,提出一种改进方法,对白化后信号先进行二分奇异值分解（SVD）处理,有效去除大部分混响干扰,然后再作匹配检测。仿真实验分析表明,相比于仅白化后的匹配滤波检测,该方法可提高信混比约3 dB,匹配检测效果得到了明显改善。     

企业强文化的资本性研究

本文围绕着企业强文化与企业绩效之间的关系,分析企业强文化的资本性与负债性。首先,在界定企业强文化的内涵后,提出强文化通过筛选与组织内部社会化两种途径形成;其次,在团队生产模型的基础上,引入信念一致性与规范的激励功能,分析了企业强文化的资本性;最后,我们提出企业强文化体现资本性的充要条件在于企业强文化激励、整合与协调组织成员的行为并且帮助组织适应外部环境,因此,在分析企业强文化的资本性与负债性时要考虑外部环境的权变作用。     

Building pragmatist theories of PM practice: Theorizing the act of project management

This article examines project management through the lens of practice. Drawing on the literature, we develop a typological model that brings together four distinct theoretical types of project management practice. Adopting a deliberately critical perspective, we show that the first three types propose a weak conception of the logical relationship between the theory and practice of project management. In contrast, the fourth type, anchored in a pragmatist conception of the theory‐practice link, provides the potential to build strong theories of project management practice. A specific objective is to elucidate the distinct features of the fourth type of theory.     

社会资本、社会网络与企业家集群——基于宁波和温州的比较研究

基于社会网络理论,文章通过研究温州和宁波两地企业家集群产生的过程,分析社会资本如何促进大规模的企业家集群产生。研究表明,企业家个人的社会资本在区域文化、共同价值观和群体信任的发酵下结成社会网络,社会网络促使更多企业家产生从而形成企业家集群。研究显示,温州企业家社会网络具有强联系、同质性和自组织的特点,创业倾向集体行动,依赖本地资源,产业升级代际锁定;宁波企业家社会网络具有弱联系、异质性和他组织的特点,外部资源掌控力强,容易引发产业升级。     

Modelling price transmission and volatility spillover in the Slovenian wheat market

Interdependence between first and second moments of producer and consumer wheat prices in Slovenia is assessed, in light of the recent major historical events that the country has undergone, as well as the recent rumours of cartel agreements between millers causing a decline in farm-gate prices, while leaving consumer prices untouched. A threshold vector error correction and multivariate generalized autoregressive conditional heteroscedasticity model with exogenous variables is applied. Results indicate that price-level adjustments mainly favour retailers by increasing their marketing margins. Important second-moment interactions are also identified. Increases in international wheat stocks reduce producer prices, while higher interest rates increase their instability.