2020 marks the 25th anniversary of the “digital divide.” Although a quarter century has passed, legacy digital inequalities continue, and emergent digital inequalities are proliferating. Many of the initial schisms identified in 1995 are still relevant today. Twenty-five years later, foundational access inequalities continue to separate the digital haves and the digital have-nots within and across countries. In addition, even ubiquitous-access populations are riven with skill inequalities and differentiated usage. Indeed, legacy digital inequalities persist vis-à-vis economic class, gender, sexuality, race and ethnicity, aging, disability, healthcare, education, rural residency, networks, and global geographies. At the same time, emergent forms of inequality now appear alongside legacy inequalities such that notions of digital inequalities must be continually expanded to become more nuanced. We capture the increasingly complex and interrelated nature of digital inequalities by introducing the concept of the “digital inequality stack.” The concept of the digital inequality stack encompasses access to connectivity networks, devices, and software, as well as collective access to network infrastructure. Other layers of the digital inequality stack include differentiated use and consumption, literacies and skills, production and programming, etc. When inequality exists at foundational layers of the digital inequality stack, this often translates into inequalities at higher levels. As we show across these many thematic foci, layers in the digital inequality stack may move in tandem with one another such that all layers of the digital inequality stack reinforce disadvantage.

Marking the 25th anniversary of the “digital divide,” we continue our metaphor of the digital inequality stack by mapping out the rapidly evolving nature of digital inequality using a broad lens. We tackle complex, and often unseen, inequalities spawned by the platform economy, automation, big data, algorithms, cybercrime, cybersafety, gaming, emotional well-being, assistive technologies, civic engagement, and mobility. These inequalities are woven throughout the digital inequality stack in many ways including differentiated access, use, consumption, literacies, skills, and production. While many users are competent prosumers who nimbly work within different layers of the stack, very few individuals are “full stack engineers” able to create or recreate digital devices, networks, and software platforms as pure producers. This new frontier of digital inequalities further differentiates digitally skilled creators from mere users. Therefore, we document emergent forms of inequality that radically diminish individuals’ agency and augment the power of technology creators, big tech, and other already powerful social actors whose dominance is increasing.

China has in recent years seen the rapid adoption of multifunctional social networking applications such as WeChat. This paper aims to explore if China’s social stratification has influenced the adoption and use of mobile social apps and if social apps such as WeChat can help to bridge the digital divide by providing urban and rural users equal access to diverse information and communication resources. The study is based on 4 months of fieldwork in the Henan Province of central China and combines quantitative data from surveys and qualitative data from semistructured interviews and focus groups. We found that there still exists a digital gap in the adoption and use of mobile social apps such as WeChat between rural and urban China, but such differences are also associated with demographic variables such as age, gender, and education level. Meanwhile, we found that WeChat has become more than a communication tool; it has also played an essential role in everyday problem-solving and information seeking for both rural and urban users. Our qualitative interviews and focus group studies reveal how WeChat influences various aspects of daily life in developing areas in China. We argue that although some divides in information seeking are being overcome, other new divides are emerging.

He has interests in virtual environments, the social aspects of e-science, and the sociology of science and technology. He has written extensively about virtual reality technology.

As the number of smart phones and other mobile devices are proliferating, traffic volume generated by them grows drastically these days. These devices are often connected to WiFi access points (APs) for the first/last mile accesses to the Internet. APs accommodate large traffic to and from these mobile devices. While downloading large content onto mobile devices is often aided by caches placed at and near the WiFi APs, uploading large User-Generated-Content (UGC) has rarely been accelerated. In this paper, we propose the design of our upload acceleration service framework and then describe our implementation of a prototype on our virtualized network architecture Cloud Rack [1] with virtualized host-based WiFi APs. The experimental results show that time of data uploading can be significantly reduced by our proposed service.