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International audienceThis study develops a conceptual framework for measuring the effectiveness of Internet-based 3D advertisements. The study uses an interdisciplinary literature review (marketing, information systems, and human-computer interaction) to enhance the understanding of the impact of using 3D visualisation in online advertisements, and to identify the most relevant conditions for application. The findings demonstrate the effectiveness of such ads in the case of a geometric product, as well as in the case of a material product. This study's results highlight the significance of telepresence as a mediator. The findings reveal that telepresence determines how ad format (2D versus 3D) influences the range of variables used to measure advertising effectiveness

E-leadership has emerged in virtual team literature as an important determinant of relationship building. However, the way e-leaders develop high quality relationship between virtual team members is little understood. The purpose of this paper is to identify the key roles that enable virtual team leaders to build high-quality exchanges with their team members. We draw on the behavioral complexity theory to analyze the roles played by e-leaders, which help them to develop effective leader-member exchanges (LMX). We draw up a research model to explain how e-leaders build cooperative and collaborative relationships through social-related and work-related activities. We then test the research model using a large survey of 193 virtual team members. Our findings show that, except for internal process roles (coordination and monitoring), open systems roles, roles of rational pursuit of goals and human relation roles have a significant positive effect on LMX.

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