The study aims to investigate the relationship between the prices of agricultural products at the producer level with the prices of the same products at the consumer level in South Sumatera, Indonesia with a case study on the production and consumption of rice as the most important agricultural product in Indonesia. The analytical approach is linear regression modelling with Ordinary Least Squares (OLS), and the Approach of Index Market Connection model (IMC). The findings of the study indicated integration between the price of rice at the producer level and the price of rice at the consumer level. In addition, the three sample regions have IMC value less than 1, meaning that both markets have vertical integration in the short run.

This study aims to examine the impact of market structure and market behavior on the Islamic banking performance in Indonesia. Using the SCP model framework, this study examines five largest Islamic banking in Indonesia. The result reveals that market behavior, Islamic banking performance, third party funds, the business scale and the target market of Islamic banking have a significant impact on the market structure of Islamic banking industry; the market structure, performance of Islamic banks, types of financing product, profit sharing rate and distribution scale have a significant impact on the behavior of Islamic banking industry; and the market structure, market behavior, human resources development, the quality of Islamic banks' financing and the credibility of Islamic banking financing have a significant impact on Islamic banking performance in Indonesia.

The aim of the study was to find out how strong the impact of intellectual capital, profitability and dividends is on the market capitalization of companies listed on the Indonesia Stock Exchange (IDX) and included in the LQ45 index from 2014 to 2018. The authors employ the multiple linear regression method. They measure the value of intellectual capital by the value added intellectual coefficient (VAIC ™), and the profitability -by return on assets (ROA) and return on equity (ROE). To calculate a dividend per share (DPS), they divide the annual dividend by the number of outstanding shares. The results of this study show that intellectual capital and return on assets (ROA) do not significantly affect the company's market capitalization, while return on equity (ROE) and dividends do. The authors conclude that by the level of efficiency and effectiveness of the company in capital management, one may see whether investors receive higher profits. Therefore, investors are more interested in companies that have a high level of dividend distribution.

This study aims to analyze and empirically prove the effect of unemployment rate, inequality, and investment on economic growth on the island of Sumatra in a recently half of decade. Using panel dataset among N=154 districts/cities as entities on the island of Sumatra in the span period of six years (2015)(2016)(2017)(2018)(2019)(2020), this study utilizes econometric panel model of multiple linear regression. This research suggests that the variables of unemployment rate and inequality density have a significantly negative correlation with economic growth on the island of Sumatra. Meanwhile, investment rate has positively significantly correlated with economic growth on the island of Sumatra. However, this study also has several limitation such follow: firstly, this study only uses three independent variables (unemployment, inequality, and investment) meanwhile not afford other factors or variables outside the model which may also affect the dependent variable (economic growth). Despite several limitations, this research contributes as equal as an input and evaluation for stakeholders in making policies (Government and Regional Government) so that they can produce more targeted policies in an effort to increase economic growth, especially for Regional Governments on the Island of Sumatra.

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