农产品绿色技术壁垒形成的政治经济学原因探究

近年来，绿色技术壁垒问题正越来越引起人们的关注。一些发达国家以保护生态环境、保护人类、动植物生命和健康为由制定复杂苛刻的环境保护措施，对国际贸易造成了不必要的障碍。因为大部分农产品和食品的出口限制主要以保护环境和人类健康为由，如检测出进口农产品有毒成分残留超标，含有已禁用的农药和化学药品等，所以农产品贸易受绿色技术壁垒的影响更为严重。本文尝试从政治经济学的角度深刻分析农产品遭遇绿色技术壁垒的原因。     

阻碍资本外流契约对区域经济的影响

阻碍资本外流契约不仅影响资本优化配置,也削弱代理人在优惠回报契约中的谈判力,从而使区域经济难以实现效用最大化.同时,在存在代理人道德风险的情况下,阻碍资本外流契约所规定的撤资高额违约金会妨碍区域经济总效用最大化的实现.应从制度上消除区域内外资本的等级差别,规定区域融资契约合理的法定有效期,并制定强有力的法律来制止区域融资主体迫使投资者与之签订只体现自己意愿的阻碍资本外流契约.     

论各类失业的结构性质--对西方失业理论的另一种思考

从理论上说失业有很多类型。产业结构调整和升级背景下的失业原因也是多方面的。本文通过对各种失业理论的分析比较 ,认为通常所说的“结构性失业”不足以涵盖产业结构变化中的失业现象 ,现实情况下 ,“混合失业”、“自然失业”、“隐性失业”等都带有结构性质 ,都与产业结构的变化有密切的联系     

Clawbacks,Holdbacks, and CEO Contracting

“Clawbacks” are much discussed in the context of senior executive compensation, yet the discussion has largely ignored the presence of holdbacks that are already in place in many firms. Holdbacks are deferred compensation that is potentially foregone in the event that the CEO leaves the firm without good reason or they are dismissed for wrong‐doing. They are explicit or written features of a CEOs employment contract. Holdbacks are already in use at 70% of S&P 500 firms and average $18.4 million each. Firms with higher CEO replacement costs, greater information asymmetry, a recent bad experience (fraud, lawsuit, or restatement), or in more certain environments are more likely to have a holdback. In contrast, clawback adoptions are mainly driven by firms' bad experiences and external pressure from shareholders. Holdbacks and incentive‐based compensation are substitutes, as termination incentives can reduce the need for incentive compensation. As managers reasonably demand a premium for accepting risky compensation, a measure of abnormal compensation is positively associated with holdbacks, but there is no significant association between clawbacks and holdbacks. These findings suggest that the holdbacks many firms already have in place could help an “ex‐post settling up” in the event of financial misconduct, or even simply misstated financials. As companies have more control over the amounts held back ex‐ante, holdbacks are potentially more efficient.     

Modified efficient importance sampling for partially non‐Gaussian state space models

The construction of an importance density for partially non‐Gaussian state space models is crucial when simulation methods are used for likelihood evaluation, signal extraction, and forecasting. The method of efficient importance sampling is successful in this respect, but we show that it can be implemented in a computationally more efficient manner using standard Kalman filter and smoothing methods. Efficient importance sampling is generally applicable for a wide range of models, but it is typically a custom‐built procedure. For the class of partially non‐Gaussian state space models, we present a general method for efficient importance sampling. Our novel method makes the efficient importance sampling methodology more accessible because it does not require the computation of a (possibly) complicated density kernel that needs to be tracked for each time period. The new method is illustrated for a stochastic volatility model with a Student's t distribution.     

中国电信套餐选择策略研究与评析

对中国电信的乐享3G上网版套餐,利用聚类分析法对其10种套餐重新分类,以适应消费者心理及需求。同时利用层次分析法将中国电信和移动运营商针对某一消费群体制定的套餐进行对比分析,找出其不足并给出合理性建议。     

Trade facilitation in ASEAN countries: harmonisation of logistics policies

This paper studies the effectiveness of the implementation of trade facilitation measures in member countries of the Association of Southeast Asian Nations (ASEAN). We evaluate trade facilitation performance and indicate trade facilitation needs and priorities that vary between ASEAN members. In particular, we examine logistics‐related costs in ASEAN and whether the current level of logistics‐related costs could be a burden or an advantage for ASEAN countries. We also identify critical barriers that have impacts on logistics services related to foreign investment and customs across ASEAN. Finally, we propose recommendations for the harmonisation of logistics policies in ASEAN countries aimed at the development of the ASEAN Economic Community.     

The impact of governance and transparency on firm investment in Vietnam

A large literature asserts a causal relationship between the quality of economic governance and economic performance. However, attempts to establish such a link at an aggregate level have met with considerable methodological criticism. This paper seeks to overcome this limitation. We match a panel of Vietnamese enterprises from 2006 to 2010 with a unique panel dataset measuring sub‐national economic governance to estimate a relationship between local governance and private investment. We do not find a significant relationship between investment and most traditional forms of governance. However, there is one important exception – transparency, especially the public posting of planning documents, is strongly associated with higher investment across a range of different specifications. Our results have significant implications for policy, given the prevailing theory that changes in the quality of local economic governance will spur improved economic performance.     

Wage Differentials among Ownership Groups and Worker Quality in Vietnamese Manufacturing

Wholly foreign multinational enterprises (WFs), joint-venture multinationals (JVs), state-owned enterprises (SOEs) pay higher wages than domestic private firms in Vietnamese manufacturing. In large samples of medium–large (20+ employees) firms, conditional differentials accounting for worker education and occupation, as well as capital intensity, size, and shares of female workers, were substantially smaller, but positive and significant. Wage levels and differentials varied substantially among industries. Conditional differentials remained positive and significant for WFs and JVs in most of the 11 industries examined, but estimates of SOE-private differentials were insignificant in most industries. Robustness checks using 2007 data yielded similar results.