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Challenging, novel, and educational experiences are critical contributors to effective leader and follower development, in part, because such developmental experiences enable people to reconceptualize their perceptions about the traits and characteristics of effective leaders, or their implicit leadership theory (ILT). To understand how ILTs develop throughout developmental experiences, we examine the ILTs of 276 undergraduate students at the beginning and end of their first year of college. Using an open-ended ILT response format, a unique ILT trait of integrity emerged along with the dominant ILT traits of sensitivity, charisma, and dedication identified in previous literature. Overcoming limitations of the factor-based ILT approach, we investigate the development of ILT constellations, allowing a holistic picture of ILTs and how they throughout a developmental experience. Based on cluster analyses, four constellations of ILT themes emerged. Participants shifted to different ILT constellations after a year in college, moving from a non-descript, varied constellation toward constellations with clearly defined, dominant themes. Exploratory analysis revealed that completion of leadership coursework partially explains the shift towards more descript ILT constellations. Results have implications for new methods of future research using the ILTs constellation perspective and the practice of undergraduate leadership education in facilitating leader development among college students.

Two or multi-sided platforms - defined as those companies that aim to connect two or more groups of customers leveraging the opportunities provided by indirect network externalities – got massive attention from both scholars and practitioners over the last decade. Entrepreneurship scholars mainly focused on the platform's ability to enable entrepreneurial ventures for the complementors' side, exploring the network-centric view. This study aims to expand it by exploring the broader influence that sides can have on the platform provider's entrepreneurial decisions over time, during the evolution of the two-sided platform.

The study is based on a longitudinal single case study developed over five years. The research presents the born and evolution of Friendz, an Italian two-sided platform.

The research presents a four-phases evolution process that shows how the entrepreneurs may first leverage an existing platform to develop a new venture and then develop his/her own two-sided platform. In this latter phase, the findings show how the sides may actually influence the platform provider's entrepreneurial decisions, both in terms of value proposition design, but also regarding the creation of new ventures.

The study contributes to the two-sided platform literature highlighting new evolutionary paths that expand current literature and highlight the doubling platform approach. Moreover, it contributes to the entrepreneurship literature offering a novel perspective on the entrepreneurial dynamics in two-sided platforms by re-balancing the power between the platform provider and the sides within the double network-centric view.

From a practitioners' perspective, this study offers an evolutionary path and specific tactics related to the evolution of an entrepreneurial venture based on a two-sided platforms that may inspire entrepreneurs working on two-sided platforms on how to use existing platforms and on the management of sides and the value propositions used to target them.

This study takes a novel perspective at the intersection between platforms and entrepreneurship literature streams, exploring the power that sides have over the platform provider in shaping the platform's entrepreneurial evolution. In doing so, it proposes a double network view on two-sided platforms and highlights three network-related tensions that can guide the evolution of the two-sided platforms.