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This study aims to analyze the development of debit card, credit card, and e-money usage and inflation in Indonesia, while also examining the effect of these three payment instruments on inflation from January 2015 to July 2025. The method used is the Error Correction Model (ECM) with the help of Eviews 12 software, while data was obtained from Bank Indonesia (BI) and the Central Statistics Agency (BPS). The results show that in the long term, debit cards do not have a significant impact on inflation. Conversely, credit cards have a positive and significant impact, indicating that increased credit card usage can drive up inflation. On the other hand, e-money has a negative and significant effect on inflation in the long term, so that increased e-money transactions actually tend to suppress inflation. In the short term, these three payment instruments—debit cards, credit cards, and e-money—do not show a significant impact on inflation in Indonesia. These findings provide insight into the dynamics of non-cash payment instruments and provide assurance regarding price stability.

Indonesia, with its rapid economic growth, is still haunted by persistent poverty problems. Inflation is like a parasite that sticks to economic growth, has the potential to worsen the poverty gap and hinder its overcoming. The aim of this research is to examine how economic growth and inflation in Indonesia affect the level of poverty in Indonesia. Panel data collected between 1994 and 2023 from 34 provinces in Indonesia is the data source. Multiple linear regression analysis is the technique used. The findings show that the number of poor people in Indonesia is not significantly affected by economic growth or inflation. Only 25.7% of the fluctuation in the number of poor people can be explained by the regression model, based on a coefficient of determination (R-square) of 0.257; the remaining 74.3% can be explained by other factors not taken into account in this study.

This study aims to compare the results of student living cost estimates over a four-year study period using two approaches in financial mathematics, namely the discrete model and the continuous model. The background of the study is based on the need for students to manage their personal finances effectively amidst rising living costs due to inflation. The discrete model is used to predict expenses at certain time intervals, while the continuous model assumes that changes in the value of money occur continuously at all times. This study uses a quantitative descriptive-comparative method with controlled simulations on 100 student data with variations in monthly living costs between Rp2,000,000–Rp4,000,000 and a random inflation rate of 0%–20%. The data were analyzed using discrete and continuous growth formulas, then a Paired Sample t-Test was performed to determine significant differences between the two models. The results show that both models produce very similar living cost estimates with an average difference of only about 1–3% of the total four-year costs. The continuous model produces slightly higher results than the discrete model due to its exponential and continuous nature of calculations. However, the statistical test results showed a p-value > 0.05, indicating no statistically significant difference between the two. Practically, both approaches can be used equally in student financial planning, with the discrete model being more appropriate for short-term projections and the continuous model being more appropriate for long-term projections.

The purpose of this study is to examine how the growth of digital payment systems has affected Indonesia's financial system and rupiah stability. More people are using digital payment methods like e-money, credit cards, debit cards, RTGS, and QRIS as a result of technical advancements. Additionally, Bank Indonesia still encourages the adoption of digital payment methods to speed up, secure, and streamline transactions. The Two Stage Least Squares (TSLS) method is used in this study's simultaneous regression model, which employs secondary data from 2020 to 2024. The findings indicate that while inflation has a positive but negligible impact on the exchange rate, the use of credit cards and RTGS has a considerable positive impact. In the meantime, debit cards and e-money significantly reduce inflation. Inflation is significantly reduced by QRIS and the exchange rate. In order to maintain Indonesia's economic stability, it is crucial to keep enhancing literacy and security when using digital payment methods.

The purpose of this research is to examine the variables that affect stock prices in the commerce and service and consumer products industries that are listed on the Indonesia Stock Exchange.  This research study is quantitative in nature.  The information was taken from annual and financial reports that were posted on the websites of the individual companies as well as the Indonesia Stock Exchange's official website (www.idx.co.id).  The population consists of all 137 consumer products, commerce, and service businesses that were listed on the Indonesia Stock Exchange between 2009 and 2013.  Seventy-seven businesses satisfied the sample requirements based on preset criteria.  Multiple linear regression analysis was used to examine the data.  The findings demonstrate that the three sets of variables—systematic risk, macroeconomic indicators, and firm fundamentals—all significantly and favorably affect stock prices at the same time.  Stock prices are positively and significantly impacted by the following factors, in part: Return on Equity (ROE), Earnings per Share (EPS), Book Value (BV), Net Profit Margin (NPM), and inflation.  In contrast, the market beta, GDP, exchange rate, and BI rate have no discernible effects, but the debt to equity ratio (DER) has a negative and substantial influence.  With an Adjusted R Square value of 62.4%, the study's independent variables may account for a significant portion of stock price fluctuations, with additional factors outside the model influencing the remaining 37.6%.

The consequences of are covered in this research worker wages, distribution costs, and raw material prices on inflation in Banten Province’s MSME sector. Multiple linear regression and quantitative analysis show that the three independent variables significantly and favorably affect inflation. With a determination value of 98.1%, the model suggests that the three cost components account for nearly all of the variation in inflation. These findings demonstrate the significance of production cost management in containing inflation in MSMEs.

This study aims to analyze the impact of the monetary and fiscal policy mix on Indonesia's economic growth during the COVID-19 pandemic in the period 2013-2023. Using the Simultaneous Regression method (Two-Stage Least Squares/2SLS), this study tests two simultaneous equations, namely the effect of exports, unemployment rate, and inflation on economic growth (GDP), as well as the effect of exchange rates (exchange rates), interest rates, and GDP on inflation. The results of the study indicate that exports and unemployment have a significant negative effect on economic growth, while inflation has a significant positive effect on GDP. Meanwhile, the exchange rate and interest rate have a significant effect on inflation, but GDP does not have a significant effect on inflation. The normality test shows that the data is normally distributed and the autocorrelation test does not detect any autocorrelation, so the model used is valid. The effectiveness of monetary policy through the exchange rate channel on economic growth was found to be positive, although not statistically significant. This finding emphasizes the importance of coordination between fiscal and monetary policies, maintaining exchange rate stability, controlling inflation, and efforts to restore the real sector and reduce unemployment to support sustainable economic growth in Indonesia. This study provides recommendations for the government and monetary authorities to strengthen policy synergy in facing economic challenges, especially during times of crisis, to ensure more effective national economic stability and recovery.

This study examines the investment preferences of Generation Z, specifically their inclination toward gold investment. The research is based on secondary data obtained through literature studies focusing on Gen Z's investment behavior. The findings indicate that Gen Z tends to favor gold as an investment option due to several compelling reasons. One of the main motivations is the potential for profit, as gold is considered not only a stable asset but also one that offers promising long-term returns. In addition, gold is perceived as a safe investment amid economic uncertainty. Other influencing factors include: (1) security and stability, (2) ease of access and purchase through digital platforms, (3) long-term investment potential, (4) diversification of investment portfolios, (5) historical value and its role as a symbol of security, (6) easy and flexible transactions, and (7) protection against inflation. These factors highlight the strategic thinking of Gen Z investors who seek both financial security and growth through alternative investment instruments such as gold.

Economic growth is a critical aspect of economic policy in any country or economic system. According to data from Indonesia's Central Statistics Agency, the country's economic growth has fluctuated over the years. Factors influencing a nation's economic growth include export activities and inflation. The oil and gas (O&G) industry plays a strategic role in supporting national economic growth by contributing to Gross Domestic Product (GDP), state revenue, and job creation. This study aims to analyze the impact of the O&G industry on the national economy and provide perspectives on future challenges and opportunities. Using both quantitative and qualitative approaches, secondary data such as government financial reports, industry statistics, and policy analyses were utilized to assess the sector's contributions across various economic dimensions. The findings indicate that the O&G sector remains one of the primary sources of state revenue, despite significant challenges posed by declining reserves and volatile global oil prices. On the other hand, energy diversification and technological development present opportunities to enhance efficiency and sustainability in this sector.