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This research aims to determine the influence of financial literacy, peer interactions and life style on student consumptive behavior at SMAS Laboratory Undiksha Singaraja. This research has a quantitative approach, causal research type. The population of this research was students in classes X, XI and the research sample used the Proportional Random Sampling technique, namely 131 respondents. Data was collected through observations, tests and questionnaires which were analyzed through descriptive analysis and multiple linear regression using IBM SPSS Statistics version 21. The results of the research stated that: (1) Financial literacy has a negative effect on students' consumptive behavior at SMAS Laboratory Undiksha Singaraja with Tcount -0.648 0.05 therefore H1 is rejected. (2) Peer interactions have a positive and significant effect on students' consumptive behavior at the Undiksha Singaraja Laboratory High School with Tcount 110.343 > Ttable 1.9882 and Sig. 0.000 Ttable 1.9882 and Sig. 0.043 Ftable 2.68 and Sig. 0.000 < 0.05 therefore H4 is accepted. The magnitude of the contribution of financial literacy, peer interactions and life style in influencing student consumptive behavior at the Undiksha Singaraja Laboratory High School is 47.5%.
Yoga et al. (Wed,) studied this question.