A recent survey from Communications Of The ACM has investigated the growing use of crowdsourcing in web systems worldwide.
“This survey attempts to provide a global picture of crowdsourcing systems (CS) on the Web. We define and classify such systems, then describe a broad sample of systems… Given the space limitation, we do not attempt to be exhaustive. Rather, we sketch only the most important aspects of the global picture, using real-world examples. The goal is to further our collective understanding—both conceptual and practical—of this important emerging topic.” [Read More]