P2P 网络借贷研究进展及中国问题研究展望

P2P ( 个人对个人) 网络借贷是指通过网络借贷平台，在全球范围内实现个人与个人或小微企业间的小额信用借贷交易． P2P 网络借贷作为全新的互联网金融服务受到商业界的高度关注，而且发展成为学术研究的国际前沿领域． 对 P2P 网络借贷相关研究文献进行了综述，具体从影响借贷交易的信息因素、羊群效应以及社交网络等 3 个方面分析了该领域研究的现状和发展脉络． 因为中国已超越美国成为全球最大的 P2P 网络借贷交易市场，所以结合中国的具体情境和问题，提出了未来研究工作的展望．     

‘We fight for all living things’: countering misconceptions about the radical animal liberation movement

This qualitative content analysis of online documents compiled from the North American Animal Liberation Front (ALF), Earth Liberation Kollective (ELK) and Grassroots Ontario Animal Liberation (GOAL) network websites and Facebook pages explores how activism within the Radical Animal Liberation Movement (RALM) intersects with other social movements. While most literature to date traces the RALM’s (dis)junctures with other forms of social justice activism through analyses of their broad ideological assumptions, or the views of renowned RALM scholars, this research provides authentic insights into the voices of Canadian, American and Mexican activists as they are represented in documents they author themselves. Like activists in anarchistic, anti-capitalist, immigrant rights, Indigenous, prison abolition, prisoner support and radical feminist movements, those in the RALM critique capitalism, colonialism, hierarchy, racism, sexism, state power and the prison industrial complex. Our research calls into question the existing narratives that depict the RALM as an extremist, single-issue movement oblivious to all other forms of social inequality, injustice, marginalization and oppression. Rather, RALM activists are building alliances with other radical social movements to achieve the common goal of ending both human and animal suffering and exploitation.     

Demand for gambling: development and assessment of a gambling purchase task

Self-report purchase tasks are a novel approach examining the reinforcing value of addictive behaviour relative to increasing monetary costs required to access the addictive behaviour (i.e. demand). These measures reveal a positive relationship between the indices of demand and addiction problem severity and can elucidate factors associated with motivation for substance use. Gambling is an addictive behaviour that has not been examined using this paradigm. This study seeks to adapt and examine the purchase task for gambling behaviour. A gambling purchase task was devised that asked individuals how often per month they would gamble at various cover charges. Participants were 73 adults from the community with either gambling disorder (n = 28) or alcohol use disorder (n = 24) or were a healthy control (n = 21). Both the alcohol and gambling purchase tasks were administered. Results demonstrate discriminant validity of the gambling purchase task, as individuals with gambling disorder have significantly greater demand for accessing gambling than other groups. The alcohol purchase task also evidenced discriminant validity in that individuals with alcohol use disorder have significantly greater demand for alcohol than other groups. These findings support the use of the gambling purchase task to assess the demand for gambling.     

Connected political consumers: transforming personalized politics among youth into broader repertoires of action

This study explores political consumerism motivations in an effort to understand the complex ways in which this lifestyle practice fits into the broader participation repertoires of young citizens. We begin by outlining the psychological motivations for political consumerism, and theorize how they might orient political consumers toward (and away from) online expressive, political, and civic participation. In particular, we examine how the desire to gratify distinct psychological needs shapes navigation of the digital media environment in search of information and connection, and how this, in turn, shapes participation. Results of a national survey of young adults show that value-expressive, social-identification, and social-approval motivations for green living relate differently to participation, and that online community embeddedness mediates these relationships. The findings suggest that connecting to likeminded others via digitally-enabled communities can transform individual concerns into collective concerns, and extend participation from the private spheres of everyday life into the public sphere.     

Beyond the nation-state Polish national identity and cultural intimacy online

This article analyses the debate on ‘new patriotism’ in a Polish online discussion forum. We study the ways in which national identity is constructed in this setting. Digital communication contributes further to expanding discourse on national identities beyond nation-state borders. We analyse close to 6000 posts from a large Polish Internet discussion forum through the methods of quantitative concept mapping and qualitative close readings. Our results show that patriotism is negotiated beyond strictly national frameworks. It is not merely a question of national interest as it also connects people through a process of establishing and maintaining of cultural intimacy.     

Tinder and humanitarian hook-ups: the erotics of social media racism

In March 2014, at the height of the popularity of the hook-up application Tinder, The Guardian published the “Seven Shades of Cliché” of user profiles claiming that Humanitarians of Tinder are the “creepiest ticket yet to laidsville.” Humanitarians of Tinder are Tinder users (a hook-up application) who have selected to present images of themselves in humanitarian or volunteer settings outside of the West (or Global North, developed world). With a Tumblr devoted to this subgroup of Tinder users, and mainstream media outlets including The Washington Post, The Atlantic, The Huffington Post, Yahoo News, and the feminist blog Jezebel following this story, Humanitarians of Tinder evoke dialogue about the intersections of sexiness and racialized benevolence. This article takes seriously Humanitarians of Tinder to think through the connections between social media hook-ups, racial affect, feminist studies humanitarianism, and racisms in development. It asks: why do people use humanitarian photos to generate hook-ups on social media? How does holding an African baby make someone “hot”?     

基于次梯度投影的泛投资组合选择策略

在线投资组合选择(online portfolio selection)问题是当前量化投资领域一个重要的研究问题.近些年来,可投资标的的爆炸式增长急需能够有效计算的投资组合选择策略,而现有高绩效算法大多具有指数级或多项式级的时间复杂度,不利于在实际中应用.由此,本文提出了一种基于次梯度投影的泛投资组合选择策略SGP.将次梯度投影的思想应用到资产组合构建的过程中,得到策略的再平衡规则.理论上,本文分析了次梯度投影算法的竞争性能,证明了该策略是一个泛投资组合选择策略;并发现该算法具有线性时间复杂度.实证上,验证了SGP策略在美国与中国市场的表现.结果表明,SGP策略能够实现和最新的泛投资组合选择策略相当的收益率,而算法运行时间短于现有策略.参数敏感性分析表明SGP策略对参数选择不敏感;交易成本敏感性分析表明SGP策略能够承受合理的交易成本.     

线上线下融合模式下考虑战略顾客行为的供应链协调研究

在移动电商高速发展和移动支付日益便捷的时代，线上线下融合商务模式正日益成为传统零售、电子商务甚至快递物流企业转型升级的重要方向，影响着供应链运营管理及其优化决策。线上线下融合模式下的战略顾客行为不同于传统模式，其对于供应链运营管理及其优化决策的影响也不同于传统模式。基于O2O运作模式特征，运用战略顾客行为理论、供应链优化与协调理论，本文分别构建了"线上下单+线下体验+线下支付+自行提货"O2O模式1、"线上浏览+线下体验+线上购买+线下配送"O2O模式2、纯线下模式和纯线上模式下考虑战略顾客行为的供应链集中决策模型和契约协调模型，并进行了相应的数值分析，在此基础上，提出了相应的管理启示。研究结果表明：（1）无论是"线上下单+线下体验+线下支付+自行提货"O2O模式1还是"线上浏览+线下体验+线上购买+线下配送"O2O模式2，收益分享契约机制可以有效地实现战略顾客行为下的供应链协调。（2）对比两种O2O模式和两种非O2O模式，O2O模式1和O2O模式2能给供应链及其成员带来更多的利润，而纯线上模式和纯线下模式能给战略顾客带来更高的效用。（3）O2O模式下，制定较高的自提补贴和较低的折扣价格，有利于提高供应链及其成员的运营绩效。（4）O2O模式下，增强产品及其相关服务的实际体验效用，有利于提高供应链整体及其成员的运营绩效，有利于提高战略顾客的净效用。     

The Romance of Surrogacy1

This article seeks to demonstrate and analyze the cultural and emotional work surrogate mothers collectively engage in on the largest surrogacy support website, http://www.surromomsonline.com . Surrogate mothers’ online stories and discussions frame contract surrogacy as a “labor of love.” Women often describe their surrogacy as a “journey” of shared love; they hope for a lasting relationship with the couple they carry for. This article explores how the language of love, learned and internalized through online communication with other surrogates, creates both a cultural conceptualization of surrogacy and a ground for action. Love and altruistic giving are consistent with close interpersonal rather than market relationships; surrogates hope for a long‐term friendship with their couple. Surrogacy journeys, however, not infrequently end in disappointment; surrogates feel betrayed when couples cut ties. As a result of collective learning, surrogates’ discussions increasingly articulate the position that love, even when unreciprocated, can lead to repeated giving; love is noble and ennobling. Surrogates find appreciation and support in their online surrogacy community where they agree that giving life is a moral good. This stance has contributed to a renewed enthusiasm to bear children for others.