Comparing Compliance Behaviour of Students and Farmers. An Extra-laboratory Experiment in the Context of Agri-environmental Nudges in Germany

Increasing popularity of economic experiments for policy impact analysis has led to an on-going debate about the suitability of students to substitute professionals as experimental subjects. To date, subject pool effects in agricultural and resource economics experiments have not been sufficiently studied. In order to identify differences and similarities between students and non-students, we carry out an experiment in the form of a multi-period business management game that is adapted to an agri-environmental context. We compare the compliance behaviour of German agricultural students and German farmers with regard to water protection rules and analyse their responses to two different green nudge interventions. The experimental results reveal that the direction of the response to the policy treatments is similar. Even unexpected behaviour could be reproduced by the student sample. Nevertheless, the magnitude of the treatment effects differed between the two samples. This implies that experimenters in the field of agricultural and resource economics could use the subject pool of students to analyse the direction of nudge policies. If predictions should be made about the magnitude effects, we suggest using a professional subject pool.     

关于地铁车站消火栓系统的设置

地铁消火栓设计对市政给水管道的水量及水压有一定的要求,在不满足消火栓系统要求时就要在车站内设置消防水池,本文主要结合新消规,阐述当市政条件不能满足消火栓设计要求时,站内消防系统的设置。     

A tale of two clusters: knowledge and emergence

Cluster emergence is an important topic but weakly conceptualized in the literature. Focusing on the interaction of the local knowledge pool and firm growth, the paper develops a comprehensive framework to understand cluster emergence. In the framework, the cluster formation process starts with the collision of local and external knowledge which generates an innovation and stimulates the creation of local pioneering firms in a new field. To support the growth of follow-up entrants in the new industry, the local knowledge pool needs to be expanded and deepened through local knowledge sharing and external knowledge inflows. The enlarged local knowledge pool enables local firms to grow and explore other fields further. To promote cluster emergence, public policies need to facilitate the interaction of the local knowledge pool and firm growth. The paper illustrates the interactive framework with two aluminum extrusion clusters in China that emerged in different ways over different time periods.     

Multi-party computation mechanism for anonymous equity block trading: A secure implementation of turquoise plato uncross

Dark pools are financial trading venues where orders are entered and matched in secret so that no order information is leaked. By preventing information leakage, dark pools offer the opportunity for large volume block traders to avoid the costly effects of market impact. However, dark pool operators have been known to abuse their privileged access to order information. To address this issue, we introduce a provably secure multi-party computation mechanism that prevents an operator from accessing and misusing order information. Specifically, we implement a secure emulation of Turquoise Plato Uncross, Europe's largest dark pool trading mechanism, and demonstrate that it can handle real world trading throughput, with guaranteed information integrity.     

双线螺纹带轮套的加工对车工高级人才培养的探析

双线螺纹加工方法较多,用数控机床加工相对简单,普通车床加工双线螺纹也比较普遍,这不仅可以锻炼机加工者的水平也是高级车工必备的技能,是一项难度大的加工工艺。以C6140型普通车床为加工设备,对带有双线螺纹带轮套的加工方法做一详细的分析,通过对双线螺纹带轮的加工分析,可以充分发挥此项加工项目在普通车工高级人才培养中的作用,对当今社会极需的高级车工人才培养具有一定的帮助。     

用螺纹量规检测产品产生争议时的解决方法

本文分析了检测结果合格的螺纹量规检测螺纹产品时出现的疑问,并解答这些疑问。     

A regression discontinuity approach to measuring the effectiveness of oil and natural gas regulation to address the common-pool externality

Oil and natural gas reservoirs typically span multiple productive leases so that no owner has rights to the entire stock of resource, resulting in production externalities. Previous literature has examined the effectiveness of government regulation in Texas and Oklahoma in abating these externalities, finding Oklahoma to be more successful in unifying common pools and securing property rights. Using regression discontinuity design, we quantify the impact of regulatory difference between the two states. We find that Oklahoma produces an average of 3361 more barrels of oil over the life of a well, relative to Texas. Given the maturity of the fields in question, the result underscores the continuing importance of addressing common pool externalities even after the primary phase of recovery has largely been completed.     

铁路建立托盘共用系统的探讨

分析了我国铁路托盘的应用现状及存在的问题,并对铁路托盘共用系统的建立提出建议,尤其对铁路托盘共用系统在过渡时期的建立提出了可行方案,以期铁路托盘共用系统能在我国顺利展开。     

Leisure and antileisure in game play

Abstract

Leisure is often described as being intrinsically motivated and offering the element of choice. Although games are normally considered recreational or leisure activities, there are certain circumstances in which they take on qualities that are not only nonleisurelike (i.e., lacking in intrinsic motivation and choice) but are actually destructive to the leisure experience. It is suggested that certain aspects of game‐playing situations can destroy the leisurelike qualities of participation and result in abandonment of the activity. These aspects, which include social pressures to participate and conflicts that develop in the social and psychological environment of play, appear to erode intrinsic motivation and perceived freedom of choice.