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Indah Respati Kusumasari
Universitas Pembangunan Nasional “Veteran” Jawa Timur, Surabaya, Indonesia
Economics, Econometrics & Finance

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The Effect of Service Quality, Product Quality, and Price on Customer Loyalty with Customer Satisfaction as an Intervening Variable (Study at Tom Sushi Surabaya) Bebyzanna Bella Faumara; Budi Prabowo; Rusdi Hidayat Nugroho; Indah Respati Kusumasari
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 3 (2025): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i3.6881

Abstract

This research was conducted to examine the extent to which service quality, product quality, and price are able to shape customer loyalty, with customer satisfaction as the link, at Tom Sushi Surabaya. This research departs from the phenomenon of increasing Japanese culinary trends in Indonesia as well as the business need to keep customers loyal in the midst of fierce competition. Using a quantitative approach and purposive sampling technique of 100 respondents, the data was analyzed using the Partial Least Square (PLS) method. The research findings show that product quality and price have a positive and significant impact on customer satisfaction, while service quality does not show a significant influence. Customer loyalty was shown to be influenced by price and satisfaction level, but not directly by service or product quality. On the other hand, customer satisfaction plays an intermediary role in the relationship between product quality and price and loyalty, but not service quality.
The Effect of Good Corporate Governance on Corporate Social Responsibility on Company Value With Profitability as an Intervening Variable (Empirical Study on Consumer Goods Sector Companies Listed on the Indonesia Stock Exchange for the 2019-2023 Period) Risa Bonani Prastika; Rusdi Hidayat Nugroho; Budi Prabowo; Indah Respati Kusumasari
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 3 (2025): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i3.6908

Abstract

With profitability serving as a mediator, this research seeks to examine the impact of Good Corporate Governance and Corporate Social Responsibility on business value. Managerial ownership, institutional ownership, and independent commissioners are the proxies of good corporate governance. The GRI is what's known as "Corporate Social Responsibility" in the business world. Return on Assets (ROA) is a measure of profitability, while Price to Book worth (PBV) is a method for calculating a company's worth. The 23 consumer products businesses listed on the Indonesia Stock Exchange from 2019 to 2023 made up the population in this research. Utilizing inferential statistical analysis tools and a purposive sample procedure, this research quantifies its findings via statistical analysis. For the purpose of calculating each variable, data is retrieved utilizing documentation approaches by obtaining sustainability reports and annual reports from the Indonesia Stock Exchange's official website. This research found that good corporate governance has an effect on company value and profitability. Firm value is unaffected by corporate social responsibility, on the other hand. Firm value is influenced by profitability, which is an independent variable. Good corporate governance may increase a company's value, although profitability might mitigate this benefit. The impact of CSR on company value cannot be moderated by profitability as a mediator variable. This research has many limitations that make it unsuitable for use as a comprehensive reference for enterprises outside of the consumer products industry. It is recommended that future studies include firms from other sectors and include additional elements that contribute to the growth of company value.
Digital Marketing Strategy at SOD Group in Increasing Interest in Purchasing Concert Tickets Sounds of Downtown Festival in Surabaya Arifania Pratiwi; Indah Respati Kusumasari
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 9 No 1 (2026): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v9i1.7202

Abstract

The existence of business development supported by technology has become the backbone for many companies that want to survive and thrive in the midst of increasingly rapid business changes by implementing digital marketing in their business. Companies can implement digital marketing as part of their strategy to keep up with fast-moving market trends. This research highlights SOD Group's digital marketing strategy in increasing interest in purchasing Sounds Of Downtown Festival concert tickets. The purpose of this research is to analyze the effectiveness of digital marketing strategies implemented by SOD Group in influencing concert ticket purchasing decisions. The type of research used is qualitative research with a descriptive approach. The data analysis method used is SWOT analysis to identify strengths, weaknesses, opportunities, and threats. The results of the research analysis using the IFAS and EFAS tables show that Sounds Of Downtown Festival has four main factors. Strength factors with a total score of 3.09, weakness factors get a total score of 0.38, opportunity factors get a total score of 2.12, and threat factors have a total score of 0.80. Based on the consequences of the SWOT line, Sounds Of Downtown Festival is in quadrant I with a value of (X;Y) (2.71 - 1.32) which indicates a strategic position to implement aggressive strategic planning.
The Influence of Celebrity Endorser 'Tasya Farasya' and Big Five Personality on Impulsive Buying in Surabaya (Case Study of Consumers of Somethinc Skincare Products) Cantika Aura Jahzy; Indah Respati Kusumasari
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 3 (2025): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i3.7498

Abstract

The increasing use of celebrity endorsers and personalized marketing in the beauty industry has influenced consumer buying behavior, particularly impulsive buying. This study aims to examine the effect of Celebrity Endorser and Big Five Personality on Impulsive Buying among Somethinc skincare consumers in Surabaya. The research addresses whether these variables influence impulsive buying both simultaneously and partially. A quantitative method with an associative approach was applied. Data were collected through questionnaires distributed to 100 respondents using purposive sampling. The analysis involved validity, reliability, classical assumption tests, multiple linear regression, hypothesis testing (t-test and F-test), and the coefficient of determination (R²). The results show that Celebrity Endorser and Big Five Personality simultaneously have a significant effect on impulsive buying. Partially, Celebrity Endorser and Big Five Personality both have significant effects. These findings highlight the importance of combining external marketing stimuli and internal personality traits in influencing impulsive buying behavior.
The Impact of Perceived Ease of Use, Perceived Usefulness, and Trust on Users’ Intention to Use QRIS on BCA Mobile in Surabaya Inggrid Destrina; Indah Respati Kusumasari
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 9 No 1 (2026): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v9i1.7615

Abstract

This study is based on technological advancement that have brought significant changes and contributions to various sectors, including finance. One such development is the adoption of financial technology, which integrates finance and technology to enhance efficiency and convenience for users. This research employs a quantitative method with an associative approach. The sampling technique used is purposive sampling, with a total of 150 respondents. Data were analyzed using the PLS-SEM (Partial Least Squares Structural Equation Modeling) method with the help of SmartPLS version 4.0.9.9. The results show that perceived ease of use has no significant effect on usage intention. Meanwhile, perceived usefulness and trust have a significant effect on the intention to use the QRIS feature in the BCA Mobile application in Surabaya.
THE INFLUENCE OF BRAND AMBASSADOR NEO BUDAYA TECHNOLOGY (NCT DREAM) AND PROMOTION ON IMPLUSIVE BUYING ON LEMONILO PRODUCTS Unsiah Zulfa Ulinnuha; Indah Respati Kusumasari
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 3 (2025): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i3.7721

Abstract

The Korean Wave phenomenon in Indonesia has significantly influenced consumer behavior, especially among K-Pop fans. This study aims to analyze the influence of Brand Ambassador and Promotion on consumers’ impulsive buying behavior toward Lemonilo products in collaboration with NCT Dream. This associative quantitative research used purposive sampling with 100 respondents who are NCT Dream fans and had previously purchased Lemonilo's special edition products. Data were collected through online questionnaires and analyzed using multiple linear regression with SPSS. The results indicate that both Brand Ambassador and Promotion simultaneously have a significant effect on impulsive buying. Partially, the Brand Ambassador variable shows a dominant influence, supported by indicators such as visibility, credibility, attractiveness, and persuasive power, which are embodied by NCT Dream as public figures. Promotional strategies involving social media, bonus gifts, and digital campaigns also play a role in triggering spontaneous purchasing behavior. These findings confirm that collaboration with popular public figures and creative promotional strategies can effectively increase impulsive buying among millennial and Gen Z markets.
The Influence of Product Quality, Brand Image, and Content Marketing on Consumer Satisfaction (Study on Roti Mox in Surabaya) Amelia Dwi Lestari; Indah Respati Kusumasari
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 3 (2025): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i3.7736

Abstract

This study aims to determine the significant effect of Product Quality, Brand Image, and Content Marketing both simultaneously and partially on Consumer Satisfaction on Roti Mox products in Surabaya. This type of research is associative research with a quantitative approach. Variable measurement uses a Likert scale with criteria ranging from strongly disagree to strongly agree. This sampling technique uses a non-probability sampling method by applying a purposive sampling approach. The population used in this study were active followers of Instagram @rotimox in Surabaya City with a sample size of 100 respondents. The data collection method used a questionnaire distributed to respondents who met the criteria. The data analysis technique used the SPSS version 30 program. This study states that the variables Product Quality, Brand Image, and Content Marketing simultaneously have a significant effect on Consumer Satisfaction of Roti Mox products in Surabaya. The results of the study also showed that there was a positive and significant effect of Product Quality, Brand Image, and Content Marketing partially on Consumer Satisfaction of Roti Mox products in Surabaya.
Peran Brand Ambassador K-Pop terhadap Keputusan Pembelian Konsumen: Studi pada Produk Nabati dan Komunitas MYNE Isna Masmira Dwijayanti; Indah Respati Kusumasari
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 9 No 1 (2026): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v9i1.8224

Abstract

This study aims to evaluate the influence of aespa, appointed as a brand ambassador, in increasing Nabati’s purchasing decisions among the MYNE community using the VisCAP method. The method applied in this research is quantitative. A quantitative approach allows data to be collected in numerical form and analyzed using various statistical methods, such as descriptive analysis to illustrate data characteristics, correlation analysis to identify relationships between variables, and hypothesis testing to examine differences or associations within the data. This process enables researchers to identify patterns, trends, or influences that can be applied to larger populations. The sampling technique is divided into two categories: non-probability sampling and probability sampling. Data for this research were obtained by distributing questionnaires to respondents who are members of the aespa fan community (MYNE), and data collection was also supported by a literature review. The variables examined in this study are Brand Ambassador as variable X and Purchase Decision as variable Y. The data analysis techniques used include validity and reliability tests, classical assumption tests, hypothesis testing, and simple linear regression analysis. Findings from the t-test on variable X (Brand Ambassador) show a t-value of 7.316 with a significance level of 0.000. Since the significance value is below 0.05 (0.000 < 0.05) and the regression coefficient is positive at 0.701, it can be concluded that the brand ambassador has a 70.1% influence on consumers’ purchasing decisions.
PROMOTIONAL STRATEGY THROUGH THE UTILIZATION OF INSTAGRAM SOCIAL MEDIA TO INCREASE SALES VOLUME (A CASE STUDY ON CUTA HOUSE COFFEE SHOP SURABAYA) Santi Eka Rahmawati; Indah Respati Kusumasari
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 3 (2025): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i3.8536

Abstract

This study aims to analyze the effectiveness of promotional strategies carried out through the utilization of Instagram social media in increasing sales volume at Cuta House Coffee Shop Surabaya. A qualitative approach was employed, with data collected through in-depth interviews with 10 respondents, direct observations, and sales documentation. The findings reveal that Instagram-based promotional strategies have been implemented effectively, as evidenced by an increase in the company’s revenue along with higher sales volume. Analysis of internal and external environmental factors identified ten internal factors, with key strengths including diverse promotional types, attractive offers, excellent service and product quality, and online business implementation. Additionally, eight external factors were found to influence opportunities and threats in the business environment. The results of IFAS and EFAS calculations indicate total scores of 3.38 for strengths, 2.35 for weaknesses, 3.10 for opportunities, and 1.82 for threats. SWOT matrix mapping positions Cuta House’s strategy in quadrant I with coordinates (X;Y) (1.03; 1.28), indicating an aggressive strategic approach. Therefore, leveraging internal strengths to capitalize on market opportunities is a strategic action that can sustainably enhance sales volume.
Co-Authors Amelia Dwi Lestari Arifania Pratiwi Bebyzanna Bella Faumara Budi Prabowo Budi Prabowo Cantika Aura Jahzy Inggrid Destrina Isna Masmira Dwijayanti Risa Bonani Prastika Rusdi Hidayat Nugroho Santi Eka Rahmawati Unsiah Zulfa Ulinnuha