C2C网上交易中信号机制的有效性分析

本文应用Berry等(1995)^[2]提出的离散选择需求模型和差异产品的伯川德竞争模型,并利用淘宝网上的交易数据,对声誉、消费者保障计划、保修服务及信息披露四种信号策略在网上交易中的作用进行了实证研究。需求估计结果表明消费者保障计划中的"7天无理由退换货"计划以及保修服务可以作为产品质量的信号;而在其他有效信号策略存在的情况下,消费者保障计划中的"先行赔付"计划以及卖家声誉作为质量信号的作用则被削弱。成本分析表明,信息披露虽然可以提高消费者购买的可能性,但是由于发出信号的成本太低,容易被低质量卖家所模仿,因此并不能作为有效的质量信号。本文首次从供给和需求两个方面分析了信号机制在信息不对称情况下的效应及其作用机制。     

Exploring the Ebbs and Flows of Community Engagement: The Pyramid of Engagement and Water Activism in Two Canadian Communities

In this article, we share results from a comparative study exploring the dynamics of community engagement surrounding local water advocacy organizations in two Canadian communities. Although emergent local issues and the perception of crisis triggered some short-term community engagement, social factors such as collective identity, a sense of community, and sense of efficacy appear to be more important for sustaining and deepening engagement. Drawing on the results, we show how the pyramid of engagement, by depicting activist engagement as a multilevel, developmental process, can serve as a useful tool for community engagement scholars and practitioners alike.     

Strategies and cues adolescents use to assess the age of an online stranger

A common risk among adolescents is sexual solicitation, in which an adolescent is asked to provide sexual information, engage in sexual talk, or in sexual activities. Although scholars increasingly address this topic from an intrapersonal perspective, there is little attention to factors of language use and message content. In two focus group studies, we investigated whether adolescent girls consider themselves capable of assessing whether an online stranger is an adult or a peer, the extent to which adolescent girls actually succeed in making this assessment, the strategies they apply to do so, and the content- and language-related cues focused on. Our findings suggest that most of the adolescent girls are confident in their ability to assess whether the stranger is a peer or an adult with possible sexual intentions. However, we also found that only 43% were able to correctly make this assessment. Most of the adolescents seem to apply the passive strategy of uncertainty reduction: They scan the profile page of the stranger, check contact information, and the profile picture. They may choose to apply the interactive strategy to find out more about the online stranger. Important content-related cues that alarm adolescent girls are: ignoring personal questions, showing an exaggerated amount of interest, acting as a friend, and being sexually oriented. Language cues mentioned related to word usage, abbreviations, sentence length, and tone.     

Undercover policing and the spectre of ‘domestic extremism’: the covert surveillance of environmental activism in Britain

The spectre of environmental ‘domestic extremism’ has long been postulated by police leaders and security analysts in Britain. It is a narrative that has justified the commitment of enormous amounts of government resources towards police intelligence work directed at non-violent direct action campaigns. Most controversially, this has included the long-term infiltration of environmental (and other) activist groups by undercover police. This article provides a critical analysis of the justifications put forward in support of the covert surveillance of environmental activists in Britain. The paper proceeds by way of a single case study – a high profile, environmental direct action protest in the north of England – in order to reveal the levels of abuse, manipulation and deception at the basis of undercover protest policing. Through their court case, the activists involved with this action were able to obtain rare insights into the police authorisation documents for the undercover operation that had led to their arrests. An analysis of these documents provides us with a glimpse of the contradictory justifications given by senior police officers for infiltration – now under scrutiny by a public inquiry.     

Anti-hierarchical activism in Hong Kong: the post-80s youth

In 2009, a political youth movement known as the Post-80s emerged in Hong Kong to protest against the construction of a high-speed railway. While local academics and government officials framed the motivations of these youth protesters using economic rationales, I argue here that the Post-80s are better understood as conveying their dissatisfaction towards existing political structures in the city. This profile sets out Post-80s criticisms of the entrenched hierarchical dynamics in Hong Kong political culture that has shaped interactions between the government, political parties and the wider population, and discusses how the Post-80s have responded to the representational imbalances imposed by these hierarchical practices in the local political sphere by advocating for a way of doing politics where individual voices (as opposed to the collective) are emphasized, and where horizontal structures are used. I conclude by exploring the repercussions of this critique on recent political discourses and protests observed in Hong Kong.     

Exploring experiences of heterosexism and coping strategies among lesbian,gay, bisexual,and transgender persons in Swaziland

Social, cultural, and institutional processes which see heterosexuality as natural and universal discriminate against individuals who differ from this norm. This article draws on interviews with lesbian, gay, bisexual, and transgender (LGBT) people in Swaziland to provide an enhanced understanding of the ways in which heterosexism operates in practice and impacts the sexual rights of LGBT communities in Swaziland, where same-sex practices are criminalised. These narratives show the importance of solidarity and activism in coping strategies to challenge social exclusion, improve lives, and advocate for social changes. These strategies include reframing, navigating interpersonal relationships, and advocacy. We consider key lessons that emerge from our research for policy, programmes, and activism in Swaziland, as well as other low- and middle-income contexts.     

#IAmNotAfraidToSayIt: stories of sexual violence as everyday political speech on Facebook

ABSTRACT

The debate about the power and influence of networked publics often focuses on large-scale political events, activist campaigns and protest activity – the more visible forms of political engagement. On the other hand, digitally mediated activism is often questioned and sometimes derided as a lesser form of dissent, as it is easier to engage in, highly affective, and offers few assurances of sustainability of the change it calls for. But what about everyday political speech online, where social media platforms can contribute to a personalisation of politics? Can social media users express their views online and make a difference? This paper analyses around 3500 Facebook posts stemming from the #ЯНеБоюсьСказати (Ukrainian for #IAmNotAfraidToSayIt) online campaign that was started in the Ukrainian segment of Facebook in July 2016 by a local activist to raise awareness of how widespread sexual violence and sexual harassment are in the Ukrainian society. The paper argues that networked conversations about everyday rights and affective stories about shared experiences of injustice, underpinned by the affordances of social media platforms for sharing and discussing information and participating in everyday politics, can emerge as viable forms of networked feminist activism and can have real impact on the discursive status quo of an issue, both in the digital sphere and beyond it.     

What Anonymous can tell us about the relationship between virtual community structure and participatory form

As a decentralised virtual community, Anonymous has been characterised by its oppositional tendencies. Helped by a collective persona and horizontal management structure, Anonymous has facilitated a myriad of differentiated agenda. However, we can observe a distinct change in its participatory form over time. So, while Anonymous, more broadly, functions as a virtual community, its means of engagement has shifted from a social movement to a decentralised cell network. This article explores the relationship between these changes, and its evolution as a virtual community. Drawing upon Iriberri and Leroy’s [(2009 Iriberri, A., and G. Leroy. 2009. “A Life-Cycle Perspective on Online Community Success.” ACM Computing Surveys (CSUR) 41 (2): 1–29. doi: 10.1145/1459352.1459356[Crossref], [Web of Science ®] , [Google Scholar]) “A Life-Cycle Perspective on Online Community Success.” ACM Computing Surveys (CSUR) 41 (2): 1–29] life cycle framework, the article maps Anonymous’ development and identifies the structural changes that have led to this transformation in its modes of participation.     

图片信息丰裕度对消费者在线风险决策的影响

以图片标记信息丰裕度对消费者在线风险决策的影响为研究重点,引入详尽可能性模型(ELM),从购买行为发生之前的顾客关注度和购买之后的顾客满意度两个纬度,探索了消费者在线风险决策的影响因素。结果表明:信誉标记图片信息丰裕度中的评价方式种类和商家信用度、服务标记图片信息丰裕度中的保障服务以及商品促销标记,无论对消费者关注度还是消费者满意度均有显著的正向影响;支付服务图片信息丰裕度对消费者关注度影响不显著,但与消费者满意度有显著的正相关关系。另外,店铺动态评分、物流服务标记以及商品描述标记的图片信息丰裕度与消费者关注度及满意度相关性均不显著。研究结果为C2C交易平台以及网上卖家图片标记和信息展示提供了一定的理论指导。     

Developing a model of disability that focuses on the actions of disabled people

Disabled people, writers on disability and disability activists stress the importance of disabled people being included in all aspects of society. I argue that a major omission from this inclusiveness is that no current model of disability focuses on the impact of the actions of disabled people on disability. Disabled people are not passive bystanders, powerless to reduce the restrictions of disability. On the contrary, we are central to actively limiting its constraints. I develop a model of disability, called ‘active’, which focuses on the effects on disability of the individual and collective actions of disabled people. I describe published findings which indicate that engaging in self-help, using support groups and deploying assistive technology can all reduce the limitations of disability. Recent increases in the number of disability support groups and developments in assistive technology have substantially augmented the potential for disabled people to combat the effects of disability.