<![CDATA[This study aims to analyze the effect of perceived usefulness, perceived ease of use, trust and security, as well as transaction costs on the effectiveness of EDC Yokke usage in buying and selling transactions in the Banda Aceh and Aceh Besar regions. The sample in this study consists of all Alfamart merchants that have implemented EDC Yokke, totaling 26 merchants (30 respondents). This research employs a quantitative method with descriptive and causal approaches based on cross-sectional data. Data were collected through observation, questionnaire distribution, and documentation, and then analyzed using SPSS software through multiple linear regression analysis. The regression analysis results indicate that perceived usefulness (β = 0.395; sig. 0.014) as well as trust and security (β = 0.324; sig. 0.038) have a positive effect on the effectiveness of EDC Yokke usage, while perceived ease of use (β = -0.051) and transaction costs (β = -0.001) have a negative effect. Simultaneously, all independent variables significantly influence the effectiveness of EDC Yokke usage (F = 6.351; sig. 0.001), with a coefficient of determination (R²) of 0.504, indicating that 50.4% of the variation in the effectiveness of EDC Yokke usage can be explained by the four independent variables, while the remaining 49.6% is explained by other variables outside this research model.]]>
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