创业生态系统视角下的"三农"科技孵化育成体系特征与准则研究——以广清农业众创空间为例

本文基于创业生态系统的视角,分析了三农领域科技孵化育成体系的定义、特征与准则,以广清农业众创空间为例说明了"三农"科技孵化育成体系的功能实现机制,总结了其发展经验和存在不足,不仅是对现有创新创业理论的有机补充,也为乡村振兴战略下培育农村新动能提供了具有一定参考价值的实例论证.     

建章宫“一池三山”之仙山形态试探

建章宫“一池三山”的布局源于汉武帝的神仙信仰。受此影响，其中的仙山形象应是上广中狭的台状构筑物。此种台状仙山与汉代慕拟自然的假山形象并行发展，成为后世皇家园林“一池三山”的主要表达方式。通过对汉代图像资料中的仙山形象进行梳理，并结合相关的文献记载，对“一池三山”的仙山形态进行探究。进而分析了这一仙山形态在古典园林仙境景观中的发展演变，及其与汉代园林中用于迎仙的台的区别与联系，为进一步理解早期园林中的景观内容提供新的线索。     

众创空间类型如何塑造创业服务行为？基于制度逻辑视角的分析

文章基于制度逻辑视角,以浙江省746家众创空间为样本,分析了政府、高校、民营企业三类主体设立的众创空间和创业服务行为选择的关系。研究发现：（1）制度逻辑对众创空间的创业服务行为选择具有塑造作用,持有行政逻辑的政府型众创空间会将时间更多的分配给办公场所服务,而持有专业逻辑的高校型和持有公司逻辑的民企型众创空间,则分别会将时间更多的分配给培训咨询服务和投融资服务。上述发现在替换了其它两种因变量测量指标后依然成立。（2）国家级认证会使民企型众创空间显著减少在投融资服务上的时间分配比重,而显著增加在办公场所服务和培训咨询服务上的时间分配比重,这种调节效应在另外两类众创空间中并不显著,在替换了省级认证后结果依然成立。这表明,相较于公司逻辑,政府逻辑和专业逻辑更具稳定性,更不易受高阶制度因素的影响和干扰。文章拓展了制度逻辑和众创空间创业服务行为关系的理论认识,为创业者的众创空间入驻决策以及政府针对众创空间的政策制定提供了实践启示。     

The effects of crowdsourcing contribution type and temporal consistency on new product development success

Extant literature suggests that individuals contribute to crowdsourcing programs in various ways but offers few insights about whether participants' creative contributions (original new product submissions) or their evaluative contributions (scoring or commenting on others' submissions) have a greater impact on their ability to create commercializable new products. Using a large-scale data set obtained from the crowdsourcing website Threadless.com, our study examines the relative impact of participants' creative and evaluative contributions and the effects of different types of evaluative contributions on submission success (i.e., a participant's ability to generate a commercializable new product). Our findings reveal that submission success is enhanced when participants generate both creative and evaluative contributions. In addition, we find that submission success depends not only on the volume of the creative contributions that a participant makes but also on the temporal consistency with which said contributions are made (i.e., adopting a consistent vs. a sporadic submission pattern). Specifically, our findings show that a participant's creative contribution consistency enhances their submission success, especially when creative contribution volume is high. This research extends the existing crowdsourcing literature by offering new insights about how contribution type and contribution consistency in a crowdsourcing program impact submission success.     

创新生态系统视角下价值共创如何影响企业创新绩效——一个有调节的中介模型

以创新生态系统为视角，引入创新资源互动与生态系统规范机制为中介变量和调节变量，探究价值共创如何影响企业创新绩效。基于307家企业样本数据，运用结构方程模型、Bootstrap和层级回归方法对数据进行分析。研究发现：创新生态系统中，价值共创不完全直接影响企业创新绩效；创新资源互动部分中介价值共创对企业创新绩效的影响；生态系统规范机制部分正向调节价值共创对创新资源互动的影响。最后提出，创新生态系统调控方与企业要差异化地制定提升创新绩效的实施方案，营造活跃的创新资源互动氛围，形成并完善系统内生态规范机制。     

基于组态视角的众创空间创客集聚机制研究

以江苏省383家众创空间为样本，应用组态思维和QCA方法整合资源与服务两个层面的6个条件，探讨形成众创空间创客集聚差异的多重并发和复杂机理。结果发现：①众创空间高创客集聚存在服务主导型、场地-创客教育主导型、全要素型3个组态，其中，服务主导型、场地-创客教育主导型能深层次、强有力地影响众创空间高创客集聚；②众创空间非高创客集聚存在单纯地产式、单纯线下投资促进、单纯线上投资促进3种组态，且对众创空间非高创客集聚的影响基本相当；③资金资源不充足、场地资源不充足与人员服务不充足在解释非高创客集聚时具有替代作用。     

INTERNATIONAL RESERVE MANAGEMENT: A DRIFT‐SWITCHING REFLECTED JUMP‐DIFFUSION MODEL

We study the cost of shocks, that is, jump risk, with respect to reserve management when the reserve process is formulated as a drift‐switching jump diffusion with a reflecting barrier at 0. Inspired by the Brownian drift switching model, our model results in a more realistic dynamic behavior of international reserves than the buffer stock model. The new model can capture both the jump behavior in reserve dynamics and the leptokurtic feature of the increment distribution which has a higher peak and two asymmetric heavier tails than the normal distribution. Through the selection of an initial distribution that reflects certain steady state behaviors, the reserve process becomes a regenerative process. This selection enables us to derive a closed‐form expression for the total expected discounted cost of managing reserves, thus helping us to numerically find management strategies that minimize costs. The numerical results show that shocks at the reserve level have a significant effect on reserve management strategies and that model misspecification can result in nonnegligible additional costs.     

Advertising and brand attitudes: Evidence from 575 brands over five years

Quantitative Marketing and Economics - Little is known about how different types of advertising affect brand attitudes. We investigate the relationships between three brand attitude variables...     

新疆西北部农户种植决策的Logistic模型分析*——以伊犁河谷察布查尔县为例

[目的]农户种植决策是诱发农业结构调整的微观基础,研究农户种植决策的影响因素,不仅有利于了解农业种植结构,也对该区域推进和深化农业结构调整,实现农业产业化、现代化具有重要的意义。[方法]文章基于新疆察布查尔县21个行政村228户农户的问卷调查数据,应用Logistic模型,从农户家庭特征、个体特征、生产特征及收入特征等4个方面实证分析了影响农户种植决策的主要因素。[结果]对农户种植决策行为影响显著的因素有家庭总人口、耕地面积、地形部位、总收入等,其中,耕地面积和地形部位对农户种植意愿有显著正向影响,而家庭总人口和总收入对农户种植意愿有显著负向影响;常年从事农业劳动人数、户主文化水平、地块位置、地块总数以及对于农业技术服务态度没有通过检验,无法得出这几个变量与农户种植决策之间的关系。[结论]影响农户种植决策的因素除耕地面积、总收入、家庭总人口及地形部位外,还会受到政策、农户自身种植习惯、农业技术等影响,农户对农业技术知识的匮乏是影响该县农业结构调整的主要原因