Today's data-rich platforms are reshaping the operations of societal networks by providing information, recommendations, and matching services to a large number of users. How can we model the behavior of human agents in response to services provided by these platforms, and develop tools to improve the aggregate outcomes in a socially desirable manner? In this talk, I will briefly summarize our works that tackle this question from three aspects: 1) Game-theoretic analysis of the impact of information platforms (navigation apps) on the strategic behavior and learning processes of travelers in uncertain networks; 2) Market mechanism design for efficient carpooling and toll pricing in the presence of autonomous driving technology; 3) Security analysis and resource allocation for robustness under random or adversarial disruptions.