PENGARUH PENGGUNAAN MEDIA SOSIAL INSTAGRAM,TEMAN SEBAYA DAN STATUS SOSIAL EKONOMI ORANGTUA TERHADAP PERILAKU KONSUMTIF SISWA (Studi Kasus Pada Siswa Kelas XI SMA Negeri 1 Semarang)

The consumptive behavior is explaining the desire to own or consume goods in excess. The population of this research carried out all of second graders student in the academic year of 2016/2017 in SMA N 1 Semarang that is 511 students, with a sample of 84 students. This research uses descriptive quantitative and uses quiestionnaires to collect the data. The analysis method used in this research are descriptive statistics analysis and multiple linear regression analysis. The result of this research is the regression equation Y= 0,810+0,318X1+0,392X2+0,577X3. The utilization of social media instagram, peer group and socio- economic status of parents simultanously affect students’ consumptive behavior with a contribution of 52,9%. Partially, the utilization of social media instagram contributes 11,28% and peer groups affects 16,48%, however the s ocio-economic status of students’ parents affect 16% on student’s consumptive behavior.Based on the research, it can be concluded that utilization of social media instagram, peer group and socio economic status of parents simultaneously affect consumptive behavior of second graders students of SMA N 1 Semarang in the academic year of 2016/2017. Parents should also play their important role in teaching their children to be a wise shopper so that they can select things that they really need to buy. At last, the most important thing is self control for not being consumptive. When one has a strong life principle, he will not be affected by t he consumptive lifestyle around him