Expert in the economics of organizations, Professor Richard Langlois, joins us to explore how and why firms decide between internal production and market transactions. Drawing on Ronald Coase’s foundational theory of transaction costs, Langlois explains that companies “make or buy” based on which option is less costly and more effective, a question that underpins the broader structure of firms, ownership models, and vertical integration. He argues that the dominance of large, vertically integrated corporations in the mid-20th century was less about inherent superiority and more a response to poorly functioning markets during the Great Depression, World War II, and heavy financial regulation. As markets—especially capital markets—improved through deregulation, many conglomerates unwound in what Langlois calls the “vanishing hand,” a shift back toward market coordination and specialization. The conversation also examines why today’s tech giants like Amazon and Apple succeed with integration, attributing it to scale, platform dynamics, modularity, and fine-tuning advantages rather than old-style conglomerate logic. Langlois further discusses innovation, the debate over whether transformative breakthroughs are slowing, and the importance of organizational knowledge and capabilities as the foundation for growth. The episode highlights how firms must strategically balance integration, outsourcing, and core competencies in a constantly evolving market environment.