This document discusses quantifying the contribution of social media in marketing campaigns. It outlines challenges with social media attribution, such as much social media activity escaping traditional tracking. The document proposes addressing this by building on an existing attribution methodology to encompass social media through techniques like agent-based modeling. This would create unified datasets and simulated user journeys to uncover attribution and interaction effects between paid digital campaigns and earned social media. The benefits would include optimizing campaign architecture and maximizing returns across channels.