新经济地理学视角下的劳动力跨省转移机制研究--以长三角城市群为例

新经济地理学理论认为劳动力出于商品多样性偏好和节约商品运输成本的目的集聚于厂商集聚的地区。文章以长三角城市群为例,利用第六次人口普查数据和NEG模型研究了劳动力流动跨省迁移的影响因素,着重考察了市场潜能对劳动力跨省迁移的作用。研究发现：市场潜能对劳动力跨省迁移有显著的正向效应,从而证明了新经济地理学的“前向联系”;地理距离对劳动力跨省迁移有弱化效应,但没有通过显著性检验;工资水平、就业率、边界效应对劳动力跨省迁移有显著的正向效应。     

AFFECTIVE RESPONSES WITHIN A COMPLEX DECISION-MAKING TASK: THE INFLUENCE OF “PERCEPTUALLY” ILL-STRUCTURED PROBLEMS

The perceptual effects of varying levels of expert advice for potentially improving on strategic decisions were examined in conjunction with goals. The amounts of advice about decision alternatives, as well as assigned goals ranging from “nearly impossible” to “easy,” were manipulated. The task used was complex and functioned perceptually as an “ill-structured” problem. Mixed results indicated that more advice significantly affected satisfaction but advice in general had little influence on effort. On the other hand, as goal difficulty decreased, satisfaction and effort significantly increased. Easy goals were superior to more difficult ones within this perceptually ill-structured decision-making situation.     

Riemann manifold Langevin methods on stochastic volatility estimation

In this article, we perform Bayesian estimation of stochastic volatility models with heavy tail distributions using Metropolis adjusted Langevin (MALA) and Riemman manifold Langevin (MMALA) methods. We provide analytical expressions for the application of these methods, assess the performance of these methodologies in simulated data, and illustrate their use on two financial time series datasets.     

Exploitation aversion: When financial incentives fail to motivate agents

Studies of the principal-agent relationship find that monetary incentives work in many instances but that they can also backfire. Various mechanisms for this failure have been examined (e.g., intrinsic motivation, image concerns). We posit that an aversion to being exploited, i.e., being used instrumentally for another’s benefit, can also cause incentives to fail. Using an experiment we find that compliance is lower for exploitative principals compared to neutral ones despite using the same contracts. To corroborate our results we show that surveyed “exploitation aversion” mediates this effect. Our results have implications for the design and implementation of incentives within organizations.     

Prevalence of and risk factors associated with cesarean section in Lebanon — A retrospective study based on a sample of 29,270 women

Background

During the last decades, there has been an alarming and dramatic increase in the number of cesarean births in both developed and undeveloped countries. This increase has not been clinically justified but, nevertheless, has raised an important number of issues.

Dual‐Donor Organ Exchange

Owing to the worldwide shortage of deceased‐donor organs for transplantation, living donations have become a significant source of transplant organs. However, not all willing donors can donate to their intended recipients because of medical incompatibilities. These incompatibilities can be overcome by an exchange of donors between patients. For kidneys, such exchanges have become widespread in the last decade with the introduction of optimization and market design techniques to kidney exchange. A small but growing number of liver exchanges have also been conducted. Over the last two decades, a number of transplantation procedures emerged where organs from two living donors are transplanted to a single patient. Prominent examples include dual‐graft liver transplantation, lobar lung transplantation, and simultaneous liver‐kidney transplantation. Exchange, however, has been neither practiced nor introduced in this context. We introduce dual‐donor organ exchange as a novel transplantation modality, and through simulations show that living‐donor transplants can be significantly increased through such exchanges. We also provide a simple theoretical model for dual‐donor organ exchange and introduce optimal exchange mechanisms under various logistical constraints.     

Coordinating contracts for a financially constrained supply chain

We consider a financially constrained supply chain in which a supplier (leader) sells products to a retailer (follower) who has no access to bank financing due to her low credit rating. However, the supplier can borrow from a bank and offer trade credit to the retailer to alleviate her financial constraint. Failure to pay off a bank loan or trade credit incurs a variable default cost. We analyze the centralized version of the supply chain to obtain new coordination requirements. We then examine whether revenue-sharing, buyback, and all-unit quantity discount contracts can coordinate our supply chain. We show that the all-unit quantity discount contract fails to coordinate. However, the revenue-sharing and buyback contracts can coordinate the supply chain, but only when the supply chain has a sufficient total working capital. Moreover, they cannot allocate profit flexibly unless the supplier has a large enough working capital. Finally, we design a generalized revenue-sharing contract that coordinates the supply chain with flexible profit allocation, and also show by numerical examples its superiority over the revenue-sharing and buyback contracts.     

Markets or networks: Households’ choice of financial intermediary in Western China

We argue that households’ choice of financial intermediary is conditioned by households’ social network structures and socioeconomic status. Analyses show that households’ social network size and network composition affect their choices by limiting the quality and quantity of information, resources, and social influence one can access through social ties. Moreover, we find that high-SES families favor formal intermediaries due not only to their richer financial knowledge, higher affordability, and greater capacity to repay loans, but also to their high demands and special types of financial needs that can hardly be satisfied by embedded resources.     

后现代主义思潮与大学生价值观嬗变

进入新时期以来,在西方后现代主义思潮的浸染下,我国大学生的价值观发生了嬗变:由单一向多元转变、集体向个人位移、理想向世俗变动,甚至呈现出与我国社会主义核心价值观相背离的风险。后现代主义语境下的这一嬗变,因循于社会结构的变迁和大学生思维的非真实化变动,并深刻地受到大众传媒低俗化的影响。面对大学生价值观取向的变迁,引导大学生正确认识后现代主义思潮、强化大学生价值观再培育、发挥社会主义核心价值观的整合作用显得尤为重要。     

从第三方支付发展看上海国际金融中心建设

互联网时代第三方支付的发展,揭示了企业"控制用户信息流以控制支付流,控制支付流以控制资金流;获得用户网络接入权胜过获得资本所有权,获得数据投入量胜过获得资金投入量"的新规则。大平台日益成为金融机构控制用户信息流、获得用户网络接入权的重要载体,在平台组合上加载信用有关数据流日益成为形成金融机构风险管理能力的重要生产资料。在互联网时代推进上海国际金融中心建设,既要继续重视金融机构集聚,更要注重鼓励企业赢得全国性用户网络接入权,加强平台组合,增强信用数据流。上海应依托自贸试验区推进互联网金融监管创新;牵头建立长三角征信联盟集团公司;搭建本地金融机构网聚平台。