Zuora's Chief Data Scientist Carl Gold is the creator of the Subscription Economy Index™ and the Data Science behind Subscriber Insights. Carl has a PhD from the California Institute of Technology and has first author publications in leading Machine Learning and Neuroscience journals. Before coming to Zuora, he spent most of his post-academic career as a quantitative analyst on Wall Street. Now a data scientist, he uses a variety of modern tools and techniques to analyze data produced by online systems. Carl is currently writing a book about data science, you can find more information on www.fightchurnwithdata.com.