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All Journal Agrikultura JOURNAL ON SOCIAL ECONOMIC OF AGRICULTURE AND AGRIBUSINESS Jurnal Pamator : Jurnal Ilmiah Universitas Trunojoyo Madura EKOMBIS REVIEW: Jurnal Ilmiah Ekonomi dan Bisnis Mimbar Agribisnis: Jurnal Pemikiran Masyarakat Ilmiah Berwawasan Agribisnis Jurnal Penelitian Pendidikan IPA (JPPIPA) EKONOMIS : Journal of Economics and Business Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Indonesian Journal of Agricultural Research JURNAL AGRICA Journal of Saintech Transfer Agro Bali: Agricultural Journal Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Randwick International of Social Science Journal International Journal Reglement & Society (IJRS) International Journal of Educational Review, Law And Social Sciences (IJERLAS) Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) Sibatik Journal : Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan Proceedings Series on Physical & Formal Sciences East Asian Journal of Multidisciplinary Research (EAJMR) Formosa Journal of Multidisciplinary Research (FJMR) Utsaha: Journal of Entrepreneurship Jurnal Ilmiah MEA (Manajemen, Ekonomi, dan Akuntansi) Jurnal AGRISEP: Kajian Masalah Sosial Ekonomi Pertanian dan Agribisnis Majapahit Journal of Islamic Finance dan Management Baileo: Jurnal Sosial Humaniora Majapahit Journal of Islamic Finance dan Management West Science Agro AGRARIS: Journal of Agribusiness and Rural Development Research Journal of Environmental and Development Studies Indonesian Journal of Forestry Research Proceedings of The International Conference on Computer Science, Engineering, Social Sciences, and Multidisciplinary Studies
Wibowo, Rulianda P.
Program Studi Agribisnis, Fakultas Pertanian, Universitas Sumatera Utara
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Veterinary Other

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THE INFLUENCE OF PRODUCTS AND PROMOTIONS ON PURCHASE DECISIONS STUDY CASE IN PT. XYZ Annisa Audina Purba; Rulianda Purnomo Wibowo; Yeni Absah
International Journal of Educational Review, Law And Social Sciences (IJERLAS) Vol. 5 No. 3 (2025): May
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijerlas.v5i3.2973

Abstract

In the world of marketing, consumer purchasing decisions are greatly influenced by various factors, one of which is the product and promotion offered by the company. Therefore, it is important for companies to understand how these two factors can influence consumer behavior in making purchasing decisions. This study aims to investigate the Influence of Products and Promotions on Yakult Purchasing Decisions Case Study of PT. Yakult Medan Branch This type of research is quantitative. The number of samples in this study was 100 respondents. The data analysis techniques used in this study were research instrument tests (validity and reliability), descriptive statistical tests, classical assumption tests (normality, multicollinearity and heteroscedasticity), and hypothesis tests (multiple linear analysis tests, t-tests, F-tests and coefficients of determination) with the help of SPSS version 26. The results of this study indicate that Products (X1) have a positive and significant effect on Purchasing Decisions (Y), Promotions (X2) have a positive and significant effect on Purchasing Decisions (Y) and Products (X1) and Promotions (X2) have a positive and significant effect simultaneously on Purchasing Decisions (Y) at PT. Yakult Indonesia Persada Medan Branch.
Analysis of the Health Level of Regional Development Banks Before and During the Covid-19 Pandemic Using the RGEC Approach in the Sumatra Region Batubara, Mhd. Zulfadli; Sadalia, Isfenti; Wibowo, Rulianda Purnomo
East Asian Journal of Multidisciplinary Research Vol. 3 No. 1 (2024): January 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/eajmr.v3i1.7272

Abstract

This study aims to analyze the health level of regional banks before and during the pandemic period 2017-2022 in the Sumatra region. Sampling in this study were all regional development banks in the Sumatra region, totaling 8 banks. This research analysis uses the RGEC method (Risk Profile, Good Corporate Governance, Earnings and Capitals). The results of this study indicate that the health level of regional development banks for the 2017-2022 period is 90.38%, overall the condition of the Bank is in a very healthy condition while for bank health in the pre-covid period (2017-2019) of 89.30% and during the pandemic period (2020-2022) of 91.52%, from the results of this study it is stated that there is a growth in the level of bank health before and during the pandemic of 2.22%. This study also analyzed the T test to find differences before and during the pandemic using variables (NPL, LDR, ROA, NIM and CAR) for the LDR, NIM and CAR variables showed significantly different while for the GCG variable using the Wilcoxon test it was found to be significantly different before and during the pandemic.
Socioeconomic Dimensions of Food Price Fluctuations and Regional Inflation in Indonesia: Insights from Java and Sumatra Siregar, Wirda Zahra; Wibowo, Rulianda Purnomo; Siahaan, Elisabet
Baileo: Jurnal Sosial Humaniora Vol 3 No 2 (2026): January 2026 (On Process)
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/baileofisipvol3iss2pp332-352

Abstract

This study investigates the socioeconomic dynamics of food price volatility and its asymmetric impacts on regional inflation across Java and Sumatra, Indonesia’s two most economically influential islands. The research aims to analyze the short- and long-term effects of food commodity price fluctuations on regional inflation, compare the structure and magnitude of price transmission mechanisms between the two regions, and identify key commodities that drive inflation disparities. Using a quantitative explanatory approach integrated with sociological interpretation, monthly time-series data from 2020 to 2024 across six provinces are analyzed through ADF stationarity tests, VAR/VECM models, Granger causality, impulse response functions, and variance decomposition, complemented by sociological indicators such as logistics index, GRDP per capita, and household food expenditure ratio. The findings show that short-term inflationary pressures stem mainly from price shocks in red chili, shallots, and cooking oil, while long-term persistence is driven by dependence on rice, beef, and chili. Inflation in Java is largely demand-driven, whereas Sumatra’s inflation reflects supply-side constraints and weak market integration. The study’s novelty lies in combining macroeconomic modeling with regional sociological analysis, offering a socioeconomic inflation dynamics framework that reframes inflation as a socially embedded process. The research advances economic sociology by linking inflation behavior with social structure, regional inequality, and policy responsiveness.
The Influence of Internal Environmental Factors in Coffee Farming on Farmer Participation in Farming Groups in Sub-district of Ronggur Nihuta, Samosir District Rabbani, Ali; Lindawati, Lindawati; Wibowo, Rulianda P.
JURNAL AGRICA Vol. 18 No. 2 (2025): JURNAL AGRICA
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/agrica.v18i2.11188

Abstract

This research will focus on PTPN IV Regional II with the aim of exploring priority strategies that can be applied to obtain RSPO certification. With a systematic approach, this study is expected to provide practical benefits for the company and contribute to the literature in the field of agribusiness sustainability strategy. Data collection uses primary data and secondary data with a SWOT analysis approach and QSPM analysis. Increasing the number of RSPO-certified units in 1-2 years. Reducing certification costs by 15% through collaboration or clustering. Increase in demand for certified products in the global market by at least 10% per year. SWOT analysis to make a plan must evaluate external and internal factors. The QSPM analysis stage is Determining EFEM, at this stage external factors are determined and evaluated. Determining IFEM, at this stage internal factors are determined and evaluated. The results of the study indicate that the partnership strategy with certification bodies and the utilization of technological advances are the main priorities to support the success of PTPN IV in obtaining RSPO certification. This strategy plays an important role in strengthening the company's position in the global market while achieving sustainability goals. With a structured and measurable approach, PTPN IV can not only obtain RSPO certification, but also improve its reputation as a leader in the sustainable palm oil industry. Strengthening internal capacity through HR training and cost efficiency are key factors in facing the challenges of certification costs and regulatory pressures. In addition, market diversification helps companies mitigate the risk of dependence on certain markets, such as Europe.
The Influence of Attitude, Subjective Norms, Perceived Behavioral Control, Environmental Concern and Environmental Awareness on the Purchase Intention of Palm Cooking Oil in Medan City Meutia, Anna; Wibowo, Rulianda Purnomo; Rahmanta, Rahmanta
West Science Agro Vol. 3 No. 01 (2025): West Science Agro
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/wsa.v3i01.1541

Abstract

The growth of environmental awareness and sustainable consumer behavior has become an important issue in recent years. In the city of Medan, as one of the major cities in Indonesia, cooking oil consumption is an integral part of people's daily lives. However, the production and use of cooking oil also has a significant impact on the environment. This study aims to find out how consumer behavior towards the intention to buy environmentally friendly palm cooking oil. The analysis method used is Partial Least Square – Structural Equation Modelling (PLS-SEM) using the SmartPLS version 4 application and sampling technique by means of judgement sampling or purposive sampling consisting of 100 respondents. The results of this study show that Environmental Awareness is the most significant influence on the purchase intention of housewives in environmentally friendly palm cooking oil products. Furthermore, it was followed by Perception Behavior Control and Subjective Norms which had a positive and significant effect on the Purchase Intention of environmentally friendly palm cooking oil. Meanwhile, Attitude and Environmental Concern did not have a significant effect on the Purchase Intention of palm cooking oil in Medan City.
STRATEGI PENGEMBANGAN DIGITAL MARKETING PADA PT. X DENGAN MENGGUNAKAN METODE SOSTAC Simanjuntak, Chrismasya Rosiana Tamara; Nazaruddin, Nazaruddin; Wibowo, Rulianda Purnomo
Jurnal Ilmiah Manajemen, Ekonomi, & Akuntansi (MEA) Vol 8 No 1 (2024): Edisi Januari - April 2024
Publisher : LPPM STIE Muhammadiah Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31955/mea.v8i1.3850

Abstract

Tujuan penelitian ini dilakukan untuk mengetahui strategi pengembangan digital marketing pada PT X dengan menggunakan Metode SOSTAC. Jenis penelitian ini adalah kualitatif deskriptif. Informan dalam penelitian ini adalah direktur, marketing manager terdiri masing –masing satu orang teknik pengumpulan data yang digunakan adalah observasi, wawancara, dan studi dokumentasi (kepustakaan). Metode analisis data menggunakan pengumpulan data, reduksi data (data reduction) penyajian data (data display) dan penarikan kesimpulan (conclusion drawing) metode SOSTAC meliputi situation, objective, strategy, tactic, action, controlling yang merupakan sebuah sistem sebagai dasar untuk melaksanakan langkah-langkah dan menciptakan rencana serta digunakan sebagai metode dengan mempertimbangkan kelebihan dan kekurangan perusahaan serta memanfaatkan peluang dan mengurangi ancaman yang ada. Meningkatkan promosi melalui melalui marketplace dan whatsapp, PT X juga melakukan strategi yaitu berdasarkan STP (Segmentation, Targeting dan Positioning). Taktik yang dijalankan dalam strategi digital marketing adalah 4C marketing mix yang terdiri dari consumer value, cost to customer, convenience, communication. Actions (implementasi strategi) sampai saat ini PT X masih belum menggunakan biaya promosi untuk media sosial dan marketplace, strategi digital marketing masih belum berjalan sesuai dengan yang diharapkan, komunikasi masih satu arah, produk yang diposting masih belum banyak memberikan respon dari para konsumen maupun calon konsumen, untuk SDM media social kami masih memiliki keterbatasan baik mengenai ide-ide konten di media sosial maupun dalam membuat deskripsi di produk tersebut.
The Use of Technology Acceptance Model (TAM) to Analyze Consumer Acceptance Towards E-Commerce Websites. A Case of the Plantage.id Digital Transformation Solution Harsanto, Willy Aria; Matondang, Nazaruddin; Wibowo, Rulianda Purnomo
Journal of Environmental and Development Studies Vol. 4 No. 2 (2023): Journal of Environmental and Development Studies
Publisher : TALENTA Publisher, Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jeds.v4i2.13144

Abstract

Industry 4.0 has shifted business processes from traditional to digital systems and forced companies to take strategic steps to become more sustainable, one of which is e-commerce technology. A key element in getting consumers to accept and be interested in using e-commerce is the availability of a user-friendly e-commerce platform. This study intended to examine how the Technology Acceptance Model (TAM) theory's application analyzes consumer acceptability and adoption of the e-commerce website. The number of users that have completed transactions on the e-commerce (Plantage.id) website between January 2021 and August 2022 serves as the population and sample in this causal quantitative study. SEM-PLS, using the software SmartPLS, is used for data analysis. The results showed a positive and significant relationship between a significant relationship website; meanwhile, the influence of perceived ease of use on attitude towards using, perceived usefulness on behavioral intention, and attitude towards using on behavioral intention showed insignificant effects. The results of this study align with the Technology Acceptance Model (TAM) theory, which states that the perceived ease of use and perceived usefulness are the main factors that are important for users in determining the acceptance and actual usage of a new information technology system such as e-commerce. The higher these two factors, the greater the chance consumers can accept and use the systems.
Analisis Permintaan dan Persaingan Ekspor Pisang Indonesia, Filipina dan Thailand di Pasar China dengan Menggunakan Model Almost Ideal Demand System (AIDS) Sari Br Surbakti, Dian Permata; Supriana, Tavi; Wibowo, Rulianda Purnomo
Agro Bali : Agricultural Journal Vol 7, No 1 (2024)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37637/ab.v7i1.1558

Abstract

Pisang adalah salah satu komoditas unggulan ekspor buah di Indonesia. Pasar utama untuk pisang Indonesia adalah China. Indonesia bukan satu satunya negara eksportir pisang di pasar China melainkan terdapat negara lain yaitu Filipina dan Thailand. Penelitian ini bertujuan untuk menganalisis persaingan antara negara pemasok pisang di pasar China seperti Indonesia, Filipina dan Thailand menganalisis faktor-faktor yang mempengaruhi permintaan pisang di pasar China dengan menggunakan Model Almost Ideal Demand System (AIDS). Penelitian ini menggunakan data time series kuartal 1 tahun 2013 hingga kuartal 4 tahun 2022. Hasil penelitian menunjukkan bahwa nilai elastisitas harga sendiri pisang Indonesia dan Thailand bersifat elastis, sedangkan pisang Philipina bersifat inelastis. Pisang Indonesia bersaing dengan pisang Filipina hal ini dibuktikan dengan nilai elastisitas silang yang positif (substitusi) sedangkan pisang Thailand dan Indonesia memiliki hubungan saling melengkapi (komplementer). Variabel yang berpengaruh signifikan terhadap permintaan pisang di pasar China yaitu harga pisang Indonesia, Filipina, Thailand dan total nilai impor pada pangsa pasar Indonesia, harga pisang Indonesia, Filipina, Thailand dan total nilai impor pada pangsa pasar Filipina, harga pisang Indonesia, Filipina, dan total nilai impor pada pangsa pasar Thailand. 
Analysis of Rice Price Volatility in Medan City, Indonesia Wibowo, Rulianda Purnomo; Pebriyani, Dian; Indriyanti, Tietin
Agro Bali : Agricultural Journal Vol 8, No 1 (2025)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37637/ab.v8i1.2216

Abstract

One of the primary challenges faced by government policies concerning agricultural commodities is maintaining food price stability. Instability in food prices can have significant economic, political, and social repercussions. This study provides an in-depth analysis of rice price fluctuations on a daily basis, offering a clearer understanding of rice price volatility in Medan. Through seasonality and volatility analysis, this research examines the changing trends in rice prices and their associated fluctuations. It is revealed that rice prices in Medan peak in February, and  the lowest rice prices occur in December. The rice prices were more volatile before the pandemic than after it. During the pre-pandemic period, the correlation between the prices of various food items was relatively low, meaning that the prices of different commodities were not strongly linked. However, in the post-pandemic period, the correlation between rice prices and other food items in Medan became more significant, suggesting that the prices of rice were more closely tied to those of other essential foodstuffs. Although rice price volatility in Medan is generally low throughout most of the year, the government should focus particular attention on the months between October and February, when volatility tends to be higher due to factors such as seasonal demand spikes and external influences like weather conditions. By proactively managing supply and demand, ensuring adequate rice stocks, and supporting local rice production, the Medan government can more effectively navigate periods of heightened volatility and ensure that rice prices remain stable and affordable for all consumers
ANALYSIS RISK AND RETURN OF CROPS PORTFOLIO Wibowo, Rulianda Purnomo; Pebriyani, Dian
International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) Vol. 3 No. 3 (2023): June
Publisher : CV. Radja Publika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijebas.v3i3.901

Abstract

Agricultural sector is exposed to risk especially risk in crop price or production volatility. The cropping pattern or mixed cropping is a diversification strategy which is considered as an approach to reduce the risk in agriculture farming. This research was conducted to analyze the combination of two plant types, namely vegetable crops and food crops. Portfolio combine longbean and spinach as vegetable crop portfolio and paddy and corn as food crop portfolio. The risk analysis method is used to calculate expected return, standard deviation and coefficient variation. This research also analyzes the choice of portfolio based on preference using Stochastic Efficiency with Respect to A Fuction (SERF). The results showed that with the aim of reducing the risks from farming, combination of spinach with longbean and paddy with corn can reduce risks and provide greater income. Moreover, at various levels of risk preference, the vegetable portfolio is more preferred than food crops portfolio. This study result implies a potential development for vegetable crops vertical farming in Medan.
Co-Authors Abdilah Ragilia M Agustina Agustina Andri Suryadi Prasetya Angga Satria Annisa Adawiyah Annisa Audina Purba Ar Raihan Suti Nasution Ardiansyah Toy, Jefry Arifiyanto, Joiverdia Atika Hidayati Batubara, Mhd. Zulfadli Beby Karina Fawzeea Sembiring Binaria Sinaga Christine Caroline Pangaribuan Christy Ardelia Tarigan David Dior J Lubis Dedy Widarta Diah Ramadhani Sigalingging Dian Pebriyani Diana Chalil Dwi Rachmina Elfira Rahmadani Emalisa Emalisa Emalisa Emalisa Endang Rizkinawaty Sembiring Endang Sulistya Rini Faiz Andito Fery Putra Alam Bara Munthe Feryanto Habibulah Hakim, Tharmizi Harsanto, Willy Aria Hasman Hasyim Hasugian, Hardy Hayatunnufus Hayatunnufus Henny Crosita Limbong Herawati Herfita Rizki Hasanah Gurning, Herfita Rizki Hasanah Ibnu Afdillah Lubis Ikhsan Siregar Ilma, Fitri Indrawati, Titien Indriyanti, Tietin Inomo Pratama Intan Mulia Intan, Seli Venny Irawan, Muhammad Ari isfenti sadalia Isfenti Sadalia Iskandarini Kellin Tarigan Kesuma, Sinar I Indra Laurensius Parsaulian Sitinjak Lindawati Lindawati Lovina Ginting Lusi Laura Pasaribu Mahdi Maimuddin Noor Malau, Leo Rio Ependi Meilita Tryana Sembiring, Meilita Tryana Meutia, Anna Muhammad Jufri Muhammad Khaliqi Muhammad, Mahatir N. Nazaruddin Natalie Jessica Regina Surbakti Nazaruddin M Negara, Lubis Satia Nurbaty, Lubis Arlina Prihatin Lumbanraja Qaedina Tio Athira R. Rambe, Khoiru Rabbani, Ali Rahmanta Rahmanta Ginting Rahmanta Rahmanta, Rahmanta Raimon J R Hutauruk Riantri Barus, Riantri Rini, Endang Sulystia Rohni A Damanik Ronald Sibuea Rosadi, Arief Fareza Safrizal Safrizal Salmiah Salmiah Sari Br Surbakti, Dian Permata Satia Negara Lubis Satia Negara Lubis Satia Negara Lubis Sepri Ginting Siahaan, Elisabet Silvia Febrina Lubis Simanjuntak, Chrismasya Rosiana Tamara Sinar Indra Kesuma Sinar Indra Kesuma SIREGAR, GALIH ARI WIRAWAN Siregar, Qurratu Ayuni Siregar, Wirda Zahra Siti Khadijah Nasution Siti Nur Arafah Sri Fajar Ayu Sugih Arto Pujangkoro Sugih Harto Pujangkoro Surbakti, Natalie Jessica Regina Suri, Tasha Ningtyas Surya Sevi Wijayanna Tobing Syafrizal Helmi Situmorang Syahfitri, Khofifah Dwi Tanti Novianti Tavi Supriana Tavi Supriana Tavi Supriana Thomson Sebayang Thomson Sebayang Wahyu Ario Pratomo Yaya Hasanah yeni absah Yeni Absah Yessi Claudia Sianipar Yusak Maryunianta Zednita Azriani