Public procurement plays a crucial role in modern economies, serving not only as a mechanism to acquire public goods, services, and works, but also as a policy tool to foster innovation and development. This chapter uses graph embeddings and machine learning to predict firms’ competitiveness in securing contracts by activity sector, extending activity and technological diversification methods to public procurement markets.

Education systems are webs of interconnected students, teachers, programs, institutions, and decisions. This chapter argues that a network-based view of education can improve learning, social integration, well-being, and decision making by using institutional records, experiments, and computational social science methods to map relational structures across scales.

Collective memory can be quantified through the collective attention received by cultural icons, artifacts, people, scientific ideas, and technological outputs. This chapter summarizes a two-step decay model in which communicative memory and cultural memory sustain different temporal regimes of social attention.