Background Corruption affects businesses in various ways. Anti-corruption, on the other hand, can improve the institutions of the country as well as business operations. Vietnam, as a socialist-oriented country with an ongoing high-profile anti-corruption campaign, provides us a unique setting to evaluate the impacts of anti-corruption on corporate performance. Objectives We address two questions: (1) what is the effect of anti-corruption on the performance of private-owned firms in Vietnam? and (2) how does anti-corruption influence the performance of firms with state ownership (FSOs) in Vietnam? Research design To investigate the impact of anti-corruption on performance of firms with different ownership settings, we use the establishment of the Central Anti-Corruption Steering Committee of Vietnam as a quasi-natural experiment for difference-in-differences analysis. We generate treatment effects of private holding and the state block ownership. To validate the findings, we construct a novel news-based anti-corruption index from Vietnamese online newspapers and use it in a robustness test to evaluate anti-corruption’s impacts on firm performance. Results and Conclusions We find a positive impact of the anti-corruption campaign on private firms’ performance, supporting the social norm perspective of how corruption affects businesses. The empirical results indicate a negative impact of the campaign on FSOs’ performance. The findings suggest that anti-corruption benefits private firms via improving the institutional quality of the country while improving the financial transparency of FSOs. Our study provides a method for measuring anti-corruption which is virtually unobservable and absent in the literature. The findings have implications for policymaking in contemporary Vietnam.

Abstract. The problem of finding periodic orbits of dynamical systems numerically is considered. It is shown that if a convergent, strongly stable, multi-step method is employed then under some suitable conditions, there exist invariant curves. The result also shows that the rates of convergence toward the invariant curves are roughly the same for different methods and different step sizes.Introduction. The problem of locating the periodic orbits of dynamical systems numerically has been considered by many authors (see, e.g., [3,4,8]). In many instances, especially when the periodic orbits of an one-parameter family of dynamical systems are to be followed, the existence of these orbits is more important than their exact locations. This paper arises from the author's dissertation [2], Its purpose is to show that when a strongly stable method is employed, then under suitable conditions, there exist invariant curves. This result is stronger than the one obtained in [1] in that the method could be multi-step and the periodic orbit need not be stable. The result also shows that reducing the step size or employing more sophisticated methods do not necessarily improve the rate of convergence.

Objectives: To assess knowledge, attitudes of nurses and midwives regarding adverse event at the clinical departments at Hue University of Medicine and Pharmacy Hospital in 2019 and explore some related factors. Subjects and methods: Cross-sectional descriptive study on 149 nurses and midwives at clinical department at Hue University of Medicine and Pharmacy Hospital in 2019. Results: The percentage of good knowledge, good attitude are respectively: 79.2%; 78.5%. There are significant association between nurses’ and midwives’ knowledge of adverse event and educational attainment, attendance in adverse event training, the frequency of monitoring and supervision by supervisory staff (p < 0.05); between their attitudes toward adverse event and income from hospitals, attendance in adverse event training, discussion with colleagues about adverse event (p < 0.05). Conclusion: regular training, raise awareness and attitude of adverse event, encouraging to organize activities between department to exchange experiences on prevention of adverse event Key words: knowledge, attitudes, adverse event, Hue University of Medicine and Pharmacy Hospital

Ecotourism is a trend of development in the tourism industry. Thanh An island commune (Can Gio district) is one of the most attractive ecotourism destinations in recent years of Ho Chi Minh City. This study aimed to analyze the factors affecting the development of ecotourism in Thanh An island. The results of Exploratory Factor Analysis showed that there were 6 factors affecting ecotourism development in Thanh An island: (1) Service costs, (2) Facilities - infrastructure, (3) People, (4) Safety and security, (5) Environment and natural resources, and (6) Landscape. Based on the research results, some solutions to develop ecotourism in Thanh An island were proposed.