This paper examines the impact of corruption on employers' efficiency in Vietnamese firms. The Generalized Least Square (GLS) estimation method was used for data sets surveyed for Vietnamese firms in 63 localities. The research results show that the unofficial costs in the industry and the total informal costs accounting for 10% or more of revenue will negatively affect the labor efficiency of these enterprises. For costs related to administrative procedures, businesses accept to pay these fees in order to save waiting time and it contributes to increase the efficiency of employers in businesses. In addition to the corruption factor, the study also shows that the number of employees, the location of operation, the average value of fixed assets per employee and the return on equity also affect the efficiency of use. employees in Vietnamese enterprises.

This article examines how investor sentiment affects stock returns on Vietnam's stock market. Investor sentiment index is measured by a relative strength index (RSI) of 57 companies listed on the Ho Chi Minh Stock Exchange from January 1, 2015 to July 31, 2020. Control variables include investors' stock trading behavior, firm size, and cash flow per share. Using Fama-MacBeth regression estimation and general least square estimation (GSL) on a daily basis, both methods find the sentiment of high investors producing higher stock returns, on the contrary, the sentiment of low investors erodes stock returns. Different from the results of Brown and Cliff (2004) [Brown, G. W., & Cliff, M. T. (2004). Investor sentiment and the near-term stock market. Journal of empirical finance, 11(1), 1-27], the article found that the investor sentiment factor plays the most important role in explaining the return of the stock market compared to the rest of the factors.

The study aims to explore the impact of internal social capital banking on the operations of commercial banks in Vietnam. The study is executed in two phases. Phase 1 uses the expert method to build scales and design survey questions. In phase two, scale test and structural equation model analysis (SEM) are performed with a sample of 243 questionnaires for directors and deputy directors of branches of 32 commercial banks in Ho Chi Minh City. It also analyzes the contribution of the structure of the relational network within the bank and the quality of the relational network. The research results show that internal banking social capital affects all three operations; namely mobilization, lending and service provision of the banks. Based on the research results, the study proposes an analytical framework to improve the quality of internal banking relationships.

This article examines 57 companies listed on the Ho Chi Minh City Stock Exchange from January 1, 2015 to March 31, 2020, to check whether or not investors' sentiment impacts the return of these stocks. Investor's daily sentiment towards each stock was measured by the psychological line index. The results of the study using both regression methods, Fama-MacBeth and General Least Squares, show that the influence of investor sentiment to return stocks in the stock market was significant and could not be ignored. Besides, the psychological factor of investors, their trading behavior causing stock supply-demand imbalance were all important factors affecting stock return. The study also found that the effect of firm size on stock returns was more pronounced when both investor sentiment and behavior were used in research models. The finding from this study suggests that individual investors who trade stocks every day can use psychological line index, which is one of the groups of decision-making indicators.

This study conducted a survey on 243 branches of 32 commercial banks in Ho Chi Minh City in 2016 to explore and measure the composition of social capital affecting capital activities, using capital activities and service provision activities of commercial banks. The paper uses Exploratory Factor Analysis (EFA), CFA affirmation analysis and the Structural Equation Modeling (SEM). The results show that social capital directly affects all three activities of commercial banks. In addition, the study found that capital activity has a direct impact on using capital, activities of using capital directly affect the provision of services, and capital activities indirectly impact on service provision.

The purpose of this study was to examine the influence of institutions and macroeconomic factors on the capitalization of securities in East Asian and Pacific countries (EAP). A balanced panel data is used to collect time-series from 2008 to 2018 in 11 EAP countries and to analyze the impacts of institutions, macroeconomics and stock market capitalization by the general moment method (GMM). Instead of measuring in detail each aspect of the institution as in previous studies, the six institutional aspects as defined by Kaufmann et al. (2011) [Kaufmann, D., Kraay, A., & Mastruzzi, M. (2011). The worldwide governance indicators: methodology and analytical issues. Hague Journal on the Rule of Law, 3(2), 220-246.] were calculated into one institutional variable. The institutional variables in this article were measured to ensure a more logical and consistent way of institutional influence on stock capitalization. The results indicate that, the institutions and macroeconomic factors were significant in forecasting the stock market capitalization size. Institutional, economic growth and savings had positive effects, macroeconomic factors such as inflation and high interest rates had a negative impact on stock capitalization in EAP countries. The institutions and macroeconomic factors had a significant impact on stock capitalization in EAP countries, the majority of developed markets had better institutions, better control of inflation and interest rates, and most undeveloped markets had higher economic growth and domestic savings.

This paper investigates the effects of corruption and long-term investment of businesses in Vietnam using the General Least Square (GLS) estimation method for businesses in 63 provinces in Vietnam from 2016-2018. The results show that corruption was an important factor affecting the long-term investment decisions of Vietnamese enterprises. The ability to predict corruption of businesses can explain the phenomenon of part of the cash flow of businesses flowing out of production and business. Informal costs related to low-level administrative procedures act as “grease” to help businesses reduce time costs, but when the total amount of unofficial expenses exceeds 10% of revenue of businesses, they become a burden for businesses and restrain them from making long-term investments. Corrupted public officials' behavior has led businesses to misallocate resources and prevent them from making long-term investments. The result shows that the East Asia paradox holds only for the case of informal costs related to administrative procedures in Vietnam.