Pub Date : 2022-10-25DOI: 10.57110/2588-1108/vnujeb.4789
Luong Tram Anh, N. Hoai, Nguyen Thi Mai Trang, Dau Thao Vy, Le Ha Vi, Le Thi Phuong Uyen
The stock market plays an increasingly important role in restructuring the economy in Vietnam. Among many evaluation criteria, market liquidity is one of the essential factors showing the development of the stock market. This study aims to understand the influence of market liquidity on the performance of the Vietnamese stock market from 2011 to 2020. The research results show that market liquidity positively affects the Vietnamese market's excess return, and this result is unchanged with control variables. This finding contrasts with the liquidity risk premium theory, but it contributes to the debate over the role of investor sentiment in the markets.
{"title":"The Impact of Market Liquidity on Stock Returns: Empirical Evidence from the Vietnamese Stock Market","authors":"Luong Tram Anh, N. Hoai, Nguyen Thi Mai Trang, Dau Thao Vy, Le Ha Vi, Le Thi Phuong Uyen","doi":"10.57110/2588-1108/vnujeb.4789","DOIUrl":"https://doi.org/10.57110/2588-1108/vnujeb.4789","url":null,"abstract":"The stock market plays an increasingly important role in restructuring the economy in Vietnam. Among many evaluation criteria, market liquidity is one of the essential factors showing the development of the stock market. This study aims to understand the influence of market liquidity on the performance of the Vietnamese stock market from 2011 to 2020. The research results show that market liquidity positively affects the Vietnamese market's excess return, and this result is unchanged with control variables. This finding contrasts with the liquidity risk premium theory, but it contributes to the debate over the role of investor sentiment in the markets.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127748494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As the COVID-19 epidemic has been basically controlled, provinces and cities in Vietnam are actively planning to accelerate tourism recovery, ensure safety, and adapt to the new normal. The study analyzes the influence of sensory marketing on customer retention at tourist places in Hanoi. Through data obtained from 410 tourists who have experienced tourism in Hanoi, the analysis results show that marketing activities through the senses including sight, taste and touch have a positive influence on tourist satisfaction and promotion of tourist retention. Thereby, the authors also propose some solutions for managers to deploy towards maintaining satisfaction and increasing the return rate of tourists in the near future.
{"title":"Sensory Marketing and Tourism Behavior: Empirical Study in Hanoi City","authors":"N. Hà, Phan Anh","doi":"10.57110/jeb.v2i5.4762","DOIUrl":"https://doi.org/10.57110/jeb.v2i5.4762","url":null,"abstract":"As the COVID-19 epidemic has been basically controlled, provinces and cities in Vietnam are actively planning to accelerate tourism recovery, ensure safety, and adapt to the new normal. The study analyzes the influence of sensory marketing on customer retention at tourist places in Hanoi. Through data obtained from 410 tourists who have experienced tourism in Hanoi, the analysis results show that marketing activities through the senses including sight, taste and touch have a positive influence on tourist satisfaction and promotion of tourist retention. Thereby, the authors also propose some solutions for managers to deploy towards maintaining satisfaction and increasing the return rate of tourists in the near future.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128417948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Doan Vu Anh, H. Hue, Nguyen Quang Huy, P. Hiền, Nguyen Thi Hoa Huyen, Pham Ngoc Anh
The paper examines gender income inequality of informal workers in the context of Covid-19 pandemic in Vietnam through the Theil’s L index, using The Labor Force Survey by the General Statistics Office for the first three quarters of 2021. The results indicate that gender income inequality triggers informal workers' income inequality. Furthermore, males are proved to contribute more to income inequality among informal workers. In addition, results after utilizing the Blinder-Oaxaca decomposition method show that personal, labor-employment and geographical characteristics are factors breeding informal workers’ gender income inequality. Based on the findings, the authors propose several suggestions to equilibrate their income distribution and lessen the gender income inequality of informal workers.
{"title":"Gender income inequality among Vietnamese informal workers in the context of Covid-19","authors":"Doan Vu Anh, H. Hue, Nguyen Quang Huy, P. Hiền, Nguyen Thi Hoa Huyen, Pham Ngoc Anh","doi":"10.57110/jeb.v2i5.4783","DOIUrl":"https://doi.org/10.57110/jeb.v2i5.4783","url":null,"abstract":"The paper examines gender income inequality of informal workers in the context of Covid-19 pandemic in Vietnam through the Theil’s L index, using The Labor Force Survey by the General Statistics Office for the first three quarters of 2021. The results indicate that gender income inequality triggers informal workers' income inequality. Furthermore, males are proved to contribute more to income inequality among informal workers. In addition, results after utilizing the Blinder-Oaxaca decomposition method show that personal, labor-employment and geographical characteristics are factors breeding informal workers’ gender income inequality. Based on the findings, the authors propose several suggestions to equilibrate their income distribution and lessen the gender income inequality of informal workers.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133095666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vu Van Huong, T. Q. Tuyến, Le Van Dao, Dam Quang Trung
The study uses panel data and a two-step GMM estimation to figure out how formalization of firms affects Vietnam's total factor productivity (TFP) and its decompositions. TFP is broken down into output-oriented technical efficiency (OTE), (ii) output-oriented scale efficiency (OSE), and (iii) residual mixed efficiency based on the Faure-Primont (FP) index (RME). So, the mechanism of the formalization process can be thought of in different ways to improve corporate performance. The results show that formalization played a important role in the rise of TFP, OSE, and RME of SMEs in Vietnam. The findings imply that it is important to improve the business environment and formalization, which in turn promote productivity.
{"title":"The Impact of Formalization on Firm Productivity: An Application of the Fa ̈re-Primont Index","authors":"Vu Van Huong, T. Q. Tuyến, Le Van Dao, Dam Quang Trung","doi":"10.57110/jeb.v2i5.4855","DOIUrl":"https://doi.org/10.57110/jeb.v2i5.4855","url":null,"abstract":"The study uses panel data and a two-step GMM estimation to figure out how formalization of firms affects Vietnam's total factor productivity (TFP) and its decompositions. TFP is broken down into output-oriented technical efficiency (OTE), (ii) output-oriented scale efficiency (OSE), and (iii) residual mixed efficiency based on the Faure-Primont (FP) index (RME). So, the mechanism of the formalization process can be thought of in different ways to improve corporate performance. The results show that formalization played a important role in the rise of TFP, OSE, and RME of SMEs in Vietnam. The findings imply that it is important to improve the business environment and formalization, which in turn promote productivity.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121915018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Forecasting annual economic growth is an important task to help local governments set goals and policies for socio-economic development. This study proposes and develops the forecasting method for economic growth at the provincial level in Vietnam named Dynamic Systems Modeling. It is an effective method to analyze the dynamic interactions between economic growth and related factors, which is useful for forecasting economic growth. This method is a combination of traditional statistics and machine learning that brings many advantages in forecasting. Specifically, (1) This method is used to forecast panel data, which helps to control both temporal and spatial problems of the forecast object; (2) This forecasting method bases on the comparison and selection of many different models; (3) Forecast results are verified, ensuring reliable forecast results. Through the data set collected from the Vietnam General Statistics Office from 2016 to 2020, we apply the Dynamic Systems Modeling method to forecast two important economic growth indicators at the provincial level, which are GRDP and GRDP per capita. The analysis and forecasting evaluation results show that the Dynamic Systems Modeling is an effective tool for forecasting economic growth at the provincial level in Vietnam.
{"title":"Forecasting economic growth at provincial level in Vietnam: A systematic dynamics modeling approach","authors":"Manh Cuong Dong","doi":"10.57110/jeb.v2i5.4756","DOIUrl":"https://doi.org/10.57110/jeb.v2i5.4756","url":null,"abstract":"Forecasting annual economic growth is an important task to help local governments set goals and policies for socio-economic development. This study proposes and develops the forecasting method for economic growth at the provincial level in Vietnam named Dynamic Systems Modeling. It is an effective method to analyze the dynamic interactions between economic growth and related factors, which is useful for forecasting economic growth. This method is a combination of traditional statistics and machine learning that brings many advantages in forecasting. Specifically, (1) This method is used to forecast panel data, which helps to control both temporal and spatial problems of the forecast object; (2) This forecasting method bases on the comparison and selection of many different models; (3) Forecast results are verified, ensuring reliable forecast results. Through the data set collected from the Vietnam General Statistics Office from 2016 to 2020, we apply the Dynamic Systems Modeling method to forecast two important economic growth indicators at the provincial level, which are GRDP and GRDP per capita. The analysis and forecasting evaluation results show that the Dynamic Systems Modeling is an effective tool for forecasting economic growth at the provincial level in Vietnam.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114870369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper accesses the fast and sustainable development of the Vietnam economy in the 1990-2020 period. The content of fast and sustainable development is approached by multidimensions with the decomposition of fast development analyzed by two dimensions - time-series and spatial. The decomposition of sustainable development is approached by two notions including weak and strong sustainability. Qualitative and quantitative analysis is employed, based on a vector auto-regression model and cross-section regression, with the dataset reflecting Vietnam and the world economy. The evidence records that Vietnam has achieved the time-series-dimension fast development combined with weak sustainability as well as spatial-dimension fast development combined with weak sustainability, but not the time-series-dimension fast development combined with strong sustainability as well as spatial-dimension fast development combined with strong sustainability.
{"title":"Fast and Sustainable Development Space in Vietnam by a Multi-Dimension Approach","authors":"L. Hung","doi":"10.57110/jeb.v2i5.4856","DOIUrl":"https://doi.org/10.57110/jeb.v2i5.4856","url":null,"abstract":"The paper accesses the fast and sustainable development of the Vietnam economy in the 1990-2020 period. The content of fast and sustainable development is approached by multidimensions with the decomposition of fast development analyzed by two dimensions - time-series and spatial. The decomposition of sustainable development is approached by two notions including weak and strong sustainability. Qualitative and quantitative analysis is employed, based on a vector auto-regression model and cross-section regression, with the dataset reflecting Vietnam and the world economy. The evidence records that Vietnam has achieved the time-series-dimension fast development combined with weak sustainability as well as spatial-dimension fast development combined with weak sustainability, but not the time-series-dimension fast development combined with strong sustainability as well as spatial-dimension fast development combined with strong sustainability.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131341771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article aims to analyze the impact of Information & Communication Technologies (ICT) on financial development in several Southeast Asian countries (Vietnam, Singapore, Thailand, Indonesia, Malaysia, Brunei, and the Philippines) from 1996 to 2019. Data in this study are collected from the World Bank (World Bank), the International Monetary Fund (IMF), and the Pooled-OLS, random-effects, fixed-effects, and Driscoll-Kraay estimation methods are used. The research results show that ICT has a positive impact on the financial development of some Southeast Asian countries. Based on the research results, some Southeast Asian countries need to have appropriate policies for increasing financial development through ICT.
{"title":"The Impact of ICT on Financial Development: Evidence from Southeast Asian Countries","authors":"Nguyen-Hoang Minh","doi":"10.57110/jeb.v2i5.4838","DOIUrl":"https://doi.org/10.57110/jeb.v2i5.4838","url":null,"abstract":"This article aims to analyze the impact of Information & Communication Technologies (ICT) on financial development in several Southeast Asian countries (Vietnam, Singapore, Thailand, Indonesia, Malaysia, Brunei, and the Philippines) from 1996 to 2019. Data in this study are collected from the World Bank (World Bank), the International Monetary Fund (IMF), and the Pooled-OLS, random-effects, fixed-effects, and Driscoll-Kraay estimation methods are used. The research results show that ICT has a positive impact on the financial development of some Southeast Asian countries. Based on the research results, some Southeast Asian countries need to have appropriate policies for increasing financial development through ICT.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133024254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper investigates frontier market bank managers’ use of the discretionary component of loan loss provisions to manage earnings and its association with efficiency. Studies have documented that bank managers use loan loss provisions to smooth earnings, yet the association of provisioning with efficiency in frontier markets has not been empirically examined. Employing stochastic frontier analysis as a method of efficiency assessments in 22 frontier market countries, results show bank efficiency declined steadily from 2001 to 2018. This finding is contrary to economic efficiency theory and suggests that loan quality difficulties have persisted despite nations enjoying increasing economic development. Regression analysis results further reveal that earnings management (EM) via loan loss provisioning is inversely related to efficiency. Study findings support prospect theory, indicating that managers engage in risk-seeking behavior while making risk-averse judgments. Overall, the study results imply that banks should expand loan provisioning strategies to optimize resource allocation and business performance.
{"title":"Loan Loss Provisioning and Efficiency: A Study of Frontier Market Banks","authors":"Wilfred Martens, C. Bui","doi":"10.57110/jeb.v2i4.4830","DOIUrl":"https://doi.org/10.57110/jeb.v2i4.4830","url":null,"abstract":"This paper investigates frontier market bank managers’ use of the discretionary component of loan loss provisions to manage earnings and its association with efficiency. Studies have documented that bank managers use loan loss provisions to smooth earnings, yet the association of provisioning with efficiency in frontier markets has not been empirically examined. Employing stochastic frontier analysis as a method of efficiency assessments in 22 frontier market countries, results show bank efficiency declined steadily from 2001 to 2018. This finding is contrary to economic efficiency theory and suggests that loan quality difficulties have persisted despite nations enjoying increasing economic development. Regression analysis results further reveal that earnings management (EM) via loan loss provisioning is inversely related to efficiency. Study findings support prospect theory, indicating that managers engage in risk-seeking behavior while making risk-averse judgments. Overall, the study results imply that banks should expand loan provisioning strategies to optimize resource allocation and business performance.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132413475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Osobase Anthony Onogiese, Ohioze Wilson Friday, S. Musa, T. Ojo, Charles Ayobola Olufolake
This current paper reassesses the controversial discourse regarding the impact of population growth on national economies using data from 66 countries that constitute 85 per cent of the global population. The panel data spans through the periods 2001-2019. The variables include GDP per capita (regressand), aggregate population, fertility rate, life expectancy, crude death rate and gross fixed capital formation. The fixed effects estimator and panel causality tests were utilized to estimate the data. Findings from the fixed effects model suggests that GDP per capita is adversely and significantly predicted by the aggregate population and fertility rate whereas, gross fixed capital formation and crude death rate exert a positive significant effect on the regressand. Surprisingly, the panel causality result advances that there is a two-way causality between the regressand and the regressors. Following the findings, it is recommended that pragmatic policy measures that will control the rising fertility rate, encourage skill acquisition programs and raise employment generation for the rising population will be a welcome development.
{"title":"Is Population Growth a Requisite for National Economic Growth? A Revisit of the Debate Using Panel Data Analysis","authors":"Osobase Anthony Onogiese, Ohioze Wilson Friday, S. Musa, T. Ojo, Charles Ayobola Olufolake","doi":"10.57110/jeb.v2i4.4854","DOIUrl":"https://doi.org/10.57110/jeb.v2i4.4854","url":null,"abstract":"This current paper reassesses the controversial discourse regarding the impact of population growth on national economies using data from 66 countries that constitute 85 per cent of the global population. The panel data spans through the periods 2001-2019. The variables include GDP per capita (regressand), aggregate population, fertility rate, life expectancy, crude death rate and gross fixed capital formation. The fixed effects estimator and panel causality tests were utilized to estimate the data. Findings from the fixed effects model suggests that GDP per capita is adversely and significantly predicted by the aggregate population and fertility rate whereas, gross fixed capital formation and crude death rate exert a positive significant effect on the regressand. Surprisingly, the panel causality result advances that there is a two-way causality between the regressand and the regressors. Following the findings, it is recommended that pragmatic policy measures that will control the rising fertility rate, encourage skill acquisition programs and raise employment generation for the rising population will be a welcome development.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"62 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129561236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The current literature focuses mainly on the positive valence of customer engagement (CE), hence it still lacks studies on negative CE. Studies from a marketing perspective in higher education also pay attention to promoting students’ satisfaction and keeping them positively engaged with their higher education institute (HEI). This study aims to examine the negative CE behavior intention of students within the HEI community under the impact of academic aspect quality, which is one of the core elements in HE service quality. The theory of planned behavior (TPB) is used as a new lens to measure the effects of the attitudinal components of negative CE behavior. The empirical results confirm the negative impact of academic aspect quality on student intention to negatively engage with school. It also reveals the positive impact of dissatisfaction on negative CE behavior intention within HEIs. It suggests that dissatisfaction derived from perceived academic aspect quality is a remarkable predictor of student negative engagement behavior intention within HEIs. Some practical implications for practitioners are also presented in this paper.
{"title":"Negative Customer Engagement Behavior Intention in Higher Education Under the Lens of Theory of Planned Behavior: A Structural Equation Model","authors":"Pham Thi Hong Thanh, Vu Tri Dung, Dinh Viet Hung","doi":"10.57110/jeb.v2i4.4860","DOIUrl":"https://doi.org/10.57110/jeb.v2i4.4860","url":null,"abstract":"The current literature focuses mainly on the positive valence of customer engagement (CE), hence it still lacks studies on negative CE. Studies from a marketing perspective in higher education also pay attention to promoting students’ satisfaction and keeping them positively engaged with their higher education institute (HEI). This study aims to examine the negative CE behavior intention of students within the HEI community under the impact of academic aspect quality, which is one of the core elements in HE service quality. The theory of planned behavior (TPB) is used as a new lens to measure the effects of the attitudinal components of negative CE behavior. The empirical results confirm the negative impact of academic aspect quality on student intention to negatively engage with school. It also reveals the positive impact of dissatisfaction on negative CE behavior intention within HEIs. It suggests that dissatisfaction derived from perceived academic aspect quality is a remarkable predictor of student negative engagement behavior intention within HEIs. Some practical implications for practitioners are also presented in this paper.","PeriodicalId":270329,"journal":{"name":"VNU JOURNAL OF ECONOMICS AND BUSINESS","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134550693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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