Behavioral economics explores how psychological factors influence economic decision-making, often revealing deviations from classical economic theories. This study aims to investigate cognitive biases across different cultural contexts and their impact on economic choices. Utilizing a mixed-methods approach, we conducted surveys and experiments with participants from Syria, Chile, and the United States, selected due to their diverse cultural backgrounds. Quantitative data were analyzed using econometric models, while qualitative insights were drawn from structured interviews. Our findings indicate that cultural variables significantly affect the manifestation of cognitive biases such as loss aversion, overconfidence, and the endowment effect. Notably, individuals from collectivist cultures exhibited stronger tendencies toward risk aversion in group settings, whereas those from individualist cultures demonstrated a higher propensity for overconfidence in personal financial forecasts. These insights shed light on the necessity of integrating cultural considerations into behavioral economic theories. The study concludes that understanding these biases can enhance policy-making, tailoring interventions to reduce economic inefficiencies. Future research should further explore the interaction between cultural norms and cognitive biases to better inform global economic models.