This research paper addresses the compelling intersection of economic behavior and neo-colonial structures, specifically within the context of the CFA Franc currency union. The central issue under examination is the impact of the CFA Franc agreement on the behavior of capital owners in Guinea-Bissau. The purpose of this study is to understand the complex interplay between economic actions and neo-colonial mechanisms, tested via two hypotheses derived from Public Choice theory and the CFA agreement, and further relate the findings to the discourse on neo-colonialism. The study employs an Interrupted Time Series (ITS) design and Time Series Analysis (TSA) to systematically explore changes over time and assess the cause-effect relationships in a realistic manner. Findings partially confirm the hypothesis regarding foreign reserves, indicating that the CFA agreement indeed impacts capital owners' behavior. However, contrary to expectations, capital flight was found to decrease post-intervention, suggesting additional factors at play. The results illuminate the complex dynamics of the CFA union and broaden the understanding of potential neo-colonial structures, contributing to the ongoing debate on economic inequality and neo-colonialism.