Online reviews represent a cornerstone to the success of many e-commerce platforms. By helping future customers to learn about the experience of past customers, they erode the information asymmetry between buyers and sellers prior to purchase. In recent years, cholars have studied the economic outcomes of online reviews and the factors that drive the generation of reviews. Yet, important research questions on the variance of online ratings, economic outcomes of online reviews in the sharing economy, market-level drivers of reviews, and online review system design have remained unanswered. By and large, my results highlight the value of the individual- and market-level context in which online reviews are generated. In determining the outcome effects of the online rating variance, the sign of the effect depends on whether reviews have been written due to product failure or as an expression of subjective taste (Gutt 2018). Moreover, empirical evidence suggests that online reviews also have economic outcome effects in the sharing economy (Neumann et al. 2018a). Market-level environmental factors of the offline world seem to play a non-negligible role in the generation of online reviews (Neumann et al. 2018b, Gutt et al. 2018a). Finally, the avenues for future online review systems research suggest that the entwinement between online review systems and the offline world will grow even stronger - raising the need for future research - considering the ongoing rise of pervasive mobile internet devices (Gutt et al. 2018b).