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The rapid advancement of smartphone technology has shaped consumer buying behavior, especially among students who depend on these devices for learning and social interaction. This research examines how product features and price perceptions influence students’ decisions to purchase Oppo smartphones in Malang City. Using a quantitative research design, data were obtained through questionnaires distributed to 428 respondents and processed using multiple linear regression analysis. The findings indicate that both product features and perceived price positively and significantly affect purchasing decisions, with product features demonstrating a more dominant role. The proposed model accounts for 66.2% of the variance in purchase decisions, suggesting that these two factors play a substantial part in shaping consumer choices. The results highlight the need for manufacturers like Oppo to focus on continuous feature improvements and maintain competitive pricing to strengthen market appeal. It is also suggested that future studies integrate additional variables such as brand image, marketing promotions, or user experience to offer a broader and more in-depth explanation of the determinants influencing smartphone purchase behavior.

This study aims to determine the extent to which service quality, product variety, and price influence purchasing decisions at Perdana Stationery Kediri. A quantitative research method was employed, involving a total of 170 respondents who were selected using accidental sampling techniques. The primary data were gathered through a structured Likert-scale questionnaire, and then analyzed using multiple linear regression analysis to assess both the individual and simultaneous effects of the independent variables on purchasing decisions. The results of the partial tests showed that service quality has a positive and significant influence on purchasing decisions, with a t-value of 4.112 and a significance level of 0.000. Similarly, product variety demonstrated a significant positive effect (t = 3.905, p = 0.000), indicating that a wide selection of products can attract and retain more customers. Furthermore, price was also found to significantly influence purchasing decisions (t = 3.732, p = 0.000), suggesting that competitive and reasonable pricing remains an essential factor in consumers' buying behavior. The simultaneous test (F-test) showed that all three variables collectively have a significant impact on purchasing decisions, with an F-value of 45.672 and a significance value of 0.000. The model explains 45.1% of the variance in purchasing decisions, indicating a substantial level of influence. In conclusion, this study highlights that delivering high-quality service, offering diverse product options, and maintaining competitive pricing are key strategies for increasing customer purchasing decisions, improving market competitiveness, and fostering long-term customer loyalty.

Noteworthy changes in customer behavior due to the advancement of data and communication innovation have driven to an increment in online shopping, particularly amid the Covid-19 widespread. This ponder points to analyze the impact of electronic word-of-mouth (e-WOM) and believe on buy deliberate within the setting of e-commerce in Indonesia. With information appearing a surge in exchanges on different marketplaces, this consider distinguishes that positive e-WOM can increment buy deliberate, whereas negative e-WOM tends to diminish it. In expansion, consumers' level of believe in online shopping stages emphatically impacts buy choices. The discoveries appear that both e-WOM and believe have a critical positive impact on buy deliberate. The comes about of this consider give experiences for companies to develop effective promoting techniques to extend buy deliberate and construct shopper believe within the computerized time. 

The dairy industry seeks to increase consumption through various marketing strategies, because from BPS data in 2020, the level of milk consumption in Indonesia is still low. The aim of this investigation was to analyze the impact of brand ambassadors, sales promotion, social media marketing, consumptive behavior, brand trust, also halal labels on purchasing decisions for Ultra Milk x ITZY products. This investigation uses a quantitative approach with a questionnaire instrument filled out by 245 respondents, where the data is analyzed using normality, heteroscedasticity, multicollinearity, validity, reliability, also multiple linear regression analysis tests. The outcome showed that all independent variables, namely the impact of brand ambassadors, sales promotion, social media marketing, consumptive behavior, brand trust, also halal labels had a significant impact on purchasing decisions both partially also simultaneously. Overall, these variables influence purchasing decisions by 92.4%. This study concludes that these marketing factors play an crucial role in impacting consumer decisions to buy dairy products, also can be used as a reference to improve marketing strategies in an effort to increase milk consumption in Indonesia.