Over the past two decades, technology has transformed daily business activities. As a consequence, online platforms have emerged as new marketplaces, media channels and creative content outlets, offering opportunities and new challenges. Online platforms have brought convenience and efficiency and enabled firms to reach out to a vast majority of customers. Customers also enjoy shopping from the long list of product/service options brought together by the online platforms, after consulting the reviews and feedback of past customers. As profitability is a key objective of any business, the question on the effects of an online platform on the profitability of a firm is a legitimate concern. This dissertation consists of three studies investiga...