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All Journal Dinamika Akuntansi Keuangan dan Perbankan Jurnal Ilmiah Telaah Manajemen Jurnal Bisnis dan Ekonomi Proceeding Fakultas Ekonomi Media Ekonomi dan Manajemen Students´ Journal of Economic and Management Proceeding SENDI_U PROCEEDINGS J-MAS (Jurnal Manajemen dan Sains) Jesya (Jurnal Ekonomi dan Ekonomi Syariah) Ensiklopedia of Journal International Journal of Economics, Business and Accounting Research (IJEBAR) Jurnal PKM Manajemen Bisnis International Journal of Multidisciplinary Sciences and Arts Untag Business and Accounting Review IECON: International Economics and Business Conference
Agung Nusantara
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PENGARUH PENGGUNAAN LIMBAH BETON SEBAGAI SUBSTITUSI AGREGAT KASAR TERHADAP KUAT TEKAN BETON Nusantara, Agung; Mulyati, Ely
Ensiklopedia of Journal Vol 7, No 4 (2025): Vol. 7 No. 4 Edisi 1 Juli 2025
Publisher : Lembaga Penelitian dan Penerbitan Hasil Penelitian Ensiklopedia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/eoj.v7i4.3060

Abstract

This study aims to The Effect of Using Concrete Waste as a Coarse Aggregate Substitute on Concrete Compressive Strength. To find out whether concrete waste can be used as a good coarse aggregate substitute in Fc` 26.4 MPa concrete. And To find out how much compressive strength value is produced using concrete waste. At all test ages (7, 14, and 28 days), the concrete mixture with 30% concrete waste showed a consistent increase in compressive strength compared to normal concrete. This shows that the use of concrete waste as a coarse aggregate substitute with a percentage of 30% can increase the compressive strength of Fc 26 MPa concrete. Variations in the mixture of 10% and 70%, concrete waste did not provide better compressive strength results compared to normal concrete. Even the percentages of 10% and 70% tend to reduce the compressive strength of concrete. This study shows that the use of concrete waste as a coarse aggregate substitute in Fc 26 MPa concrete provides variations in the compressive strength of concrete at the ages of 7, 14, and 28 days. Specifically, the variation of 30% waste concrete mixture resulted in an increase in the compressive strength of concrete compared to normal concrete at each test age. At the age of 7 days, the compressive strength of normal concrete was 17.12 MPa, while the compressive strength with 10% LB was 16.94 MPa, 30% LB was 17.69 MPa and 70% LB was 16.60 MPa. At the age of 14 days, the compressive strength of normal concrete was 22.79 MPa, while the compressive strength with 10% LB was 21.73 MPa, 30% LB was 23.22 MPa and 70% LB was 21.52 MPa. At the age of 28 days, the compressive strength of normal concrete was 25.78 MPa, while the compressive strength with 10% LB was 25.17 MPa, 30% LB was 26.53 MPa and 70% LB was 24.96 MPa.Keywords: Concrete, Aggregate, Compressive Strength.
The Influence of Oil Prices, Gold Prices, and Inflation on the Indonesian Sharia Stock Index 2021-2025 Nawatmi, Sri Nawatmi; Nusantara, Agung; Maskur, Ali; Setiawan, Mulyo Budi
International Journal of Multidisciplinary Sciences and Arts Vol. 4 No. 3 (2025): International Journal of Multidisciplinary Sciences and Arts, Article July 2025
Publisher : Information Technology and Science (ITScience)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/ijmdsa.v4i3.6439

Abstract

As is known, the stock price index always fluctuates. Fluctuations are sometimes high, sometimes low, and sometimes it is difficult to predict the rise and fall of the stock index. Therefore, the purpose of this study is to determine how the variables of world oil prices, world gold prices and inflation affect the Indonesian sharia stock index (ISSI). The type of data is secondary data. The data taken is time-series data, the time period January 2021 - February 2025. The dependent variable is ISSI, while the independent variables are world oil prices, world gold prices and inflation. Data sources come from BPS (Central Statistics Agency), BI (Bank Indonesia) and investing.com. The analysis method used is the OLS (Ordinary Least Square) method with multiple linear regression techniques. Before analyzing, classical assumption detection was carried out starting from the detection of normality, multicollinearity, heteroscedasticity and autocorrelation. The estimation results show that the world oil price variable does not affect the movement of the ISSI, while the world gold price and inflation have a positive effect on the Indonesian sharia stock index.
GDP and CO₂ Emissions in ASEAN-5: Has the Turning Point Been Reached? Agung Nusantara; Nurhayati; Diah Amelia Azzahra; Suharti; M. Rully Sjahirul Alim; Paramitha Maylina Afifah
IECON: International Economics and Business Conference Vol. 3 No. 2 (2025): International Conference on Economics and Business (IECON-3)
Publisher : www.amertainstitute.com

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65246/kcz8ss33

Abstract

Rapid economic growth and urbanization in Southeast Asia have increased environmental pressures, particularly through rising carbon dioxide (CO₂) emissions driven by fossil fuel–based activities. The Environmental Kuznets Curve (EKC) framework is commonly used to assess whether economic growth eventually leads to lower emissions after surpassing a certain income level. This model is particularly relevant for ASEAN countries—Indonesia, Malaysia, Thailand, the Philippines, and Vietnam—that are undergoing industrial transition. This study examines the presence of the EKC in the ASEAN-5 from 1990 to 2021 and estimates the turning point for each country. Using unbalanced annual panel data, a quadratic regression model is applied through Pooled OLS, Fixed Effects, and Random Effects methods. Model selection follows Chow and Hausman tests, with robustness diagnostics including heteroskedasticity (Breusch-Pagan), residual normality (Jarque-Bera), and cross-sectional dependence (Pesaran CD and LM tests). Turning points are calculated when the GDP coefficient is positive and the squared GDP coefficient is negative and statistically significant, indicating an inverted-U relationship. Results confirm that CO₂ = f (GDP, GDP²) is a valid specification for the region, reflecting a general shift toward greener economies. However, only Malaysia and Thailand have passed their respective turning points; Indonesia, the Philippines, and Vietnam remain below. These findings highlight the varying stages of environmental transition among ASEAN countries and underscore the urgent need for energy reform and policy interventions in nations that have not yet reached the emissions-reducing phase of economic development.
THE ROLE OF GOLD AS SAVE HAVEN OR DIVERSIFIER INVESMENT IN INDONESIA Nawatmi, Sri; Santosa, Agus Budi; Nusantara, Agung
International Journal of Economics, Business and Accounting Research (IJEBAR) Vol 8 No 2 (2024): IJEBAR, VOL. 08 ISSUE 02, JUNE 2024
Publisher : LPPM ITB AAS INDONESIA (d.h STIE AAS Surakarta)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/ijebar.v8i2.13955

Abstract

This research is based on the phenomenon of increasing gold transactions in the early 2020 pandemic as an alternative investment. This study aims to answer whether gold acts more as an alternative investment tool or as a diversifier, or is it still relevant as a hedging tool or a safe haven. This study will explore a number of main variables, namely: gold prices, investment interest rates, liquid stock prices, exchange rates and consumer price levels. The data analysis is time-series data with a time span of January 2018 to October 2020. The analytical method used is pairwise correlation and cross-correlation. The results showed, through pairwise correlation analysis, it can be concluded that the gold price variable is more worthy of being called a good store of value or safe haven than its role as an alternative investment or diversification. On the other hand, based on a cross-correlation analysis involving time-lag, the gold price expectation variable for next year has a strong complementarity with the expected investment interest rate variable as well as the expected exchange rate variable. Meanwhile, the relationship between the expected gold price variable and the expected liquid stock price variable, which is often used as an investment tool indicator, has a very strong substitution or diversification relationship.
Income Inequality – Empirical Study of 34 Provinces in Indonesia Setiawan, Mulyo Budi; Nawatmi, Sri; Nusantara, Agung
Jesya (Jurnal Ekonomi dan Ekonomi Syariah) Vol 7 No 2 (2024): Artikel Periode Research Juli 2024
Publisher : LPPM Sekolah Tinggi Ilmu Ekonomi Al-Washliyah Sibolga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36778/jesya.v7i2.1677

Abstract

This research aims to find out what variables determine income inequality in 34 provinces in Indonesia 2018 - 2021. The method used in this research is pooling data or panel data. There are 3 models available in panel data, namely the PLS (pooled Least Square) model, FEM (Fixed Effect Model) and REM (Random Effect Model). Before analyzing, the first step is to determine the best model from the 3 models. The Chow test results show that the best model between PLS and FEM is FEM. To determine which model should be chosen between FEM and REM, the Hausman test is used, and the better model is FEM. Therefore, in this study FEM was used to estimate income inequality in 34 provinces in Indonesia. The estimation results show that of the 3 independent variables used in the estimation, only the HDI variable (human development index) influences income inequality in 34 provinces in Indonesia with a negative sign. Other variables, GRDP per capita and open unemployment rate do not affect income inequality.
Identification of the Economic Crisis in Indonesia 2019-2022 Nusantara, Agung; Nawatmi, Sri
Untag Business and Accounting Review Vol 1, No 2: October 2022
Publisher : Faculty of Economics and Business UNTAG Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/ubar.v1i2.3349

Abstract

This paper aims to to identify when the economic crisis in Indonesia occurred by basing itself on the formulation of The National Bureau of Economic Research, as the economic research authority in the United States, which is used as a reference for many countries including the United Nations. The Holdrick-Prescot Expectation Model is use as model with a de-trending approach that describes the information contained in the data without involving other data that might contribute to the movement of the data. the results of identification using the Gordon model and the Hodrick-Prescott method, it can be seen that the identification of crises is more accurate when using the definition applied by the NBER. Through the definition of the NBER crisis, it can be seen that Indonesia has experienced a decline in actual GDP compared to its trend value since 2019, Q4, which of course indicates the onset of an economic crisis.
Do Economic Factors Dominate Happiness: A Comparison of Western and Eastern Cultures Nusantara, Agung; Nawatmi, Sri
Untag Business and Accounting Review Vol 2, No 2: October 2023
Publisher : Faculty of Economics and Business UNTAG Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/ubar.v2i2.4450

Abstract

This article explores the factors influencing happiness levels and compares them within the contexts of Western and Eastern cultures. It particularly examines the role of income in shaping happiness, with a focus on Western cultures, often associated with materialism, and Eastern cultures, frequently linked to spirituality. The analysis reveals four significant determinants of happiness: economic achievement, social support, health, and the freedom to make choices. While income, measured by per capita GDP growth, contributes to happiness, globally, freedom of choice and social support exert a more substantial influence. This holds true when comparing Europe and North America to Asia (excluding the Middle East) and when contrasting Western and Eastern cultures. The study underscores the significance of social and political factors in achieving happiness, emphasizing the need for prioritizing their development. Furthermore, it challenges the notion that Western cultures are solely materialistic and Eastern cultures entirely spiritual, highlighting the intricacies of cultural differences. In sum, these findings emphasize the need for more comprehensive and diverse research to understand variations within specific cultural and ethnic contexts.
Co-Authors Agus Budi Santosa Agus Budi Santosa Ali Maskur Diah Amelia Azzahra Fauziana, Indah Firdaus Firdaus Jatmiko, M.Roby M. Rully Sjahirul Alim Martini Martini Martono Martono Mohammad Fauzan Mulyati, Ely Mulyo Budi Setiawan Nabella Permatasari, 13.05.51.0186 Nabella Permatasari, 13.05.51.0186 Nawatmi, Sri Nawatmi Nofikasari, Nofikasari Nurhayati Nurhayati Nurhayati Nurrahmah, Wa Ode Sitti Paramitha Maylina Afifah Sri Fadilah Sri Isnowati Sri Nawatmi Suharti Widyastuti, Ariyani