Browsing by Author "Ngo T"
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- ItemAnalysis of China’s Agri-food Imports In an Extended Gravity ModelShakur S; Tang M; Ngo TSince 2000, China has changed from a net exporter to a net importer of agri-food products to a point such that food security and agricultural trade balance are a major concern to Chinese authorities. This research estimated the effect of the ten explanatory variables that have impacted on China's accelerated food imports from 19 trading partners over 2000-2014. An extended gravity model that include economic, demographic, geographic factors and China's free trade agreements (FTAs) to 5 commodity groups separately, in addition to an aggregated data to allow a deeper understanding about the topic. Results from the research suggest that they all have varying but significant impacts on China’s agri-food imports. Agri-food imports to China are predicted to increase. For Chinese authorities to concentrate on own agricultural development and cost-effective trade with other
- ItemOperational Efficiency of Bank Loans and Deposits: A Case Study of Vietnamese Banking System(MDPI (Basel, Switzerland), 2018-03) Nguyen T; Tripe D; Ngo TThis paper examines whether there is a causal relationship between bank loans and deposits in the Vietnamese banking system and the efficiency of the use of loans and deposits by the Vietnamese banks. In a country such as Vietnam, where inter-bank money markets are relatively underdeveloped, one would expect a reasonably strong relationship between deposits and loans. A pooled cross-sectional sample of financial ratios is collected from annual reports of 44 Vietnamese banks covering the period 2008–2015. The explanatory power of instrumental variables in relation to the endogenous variables is tested. A deterministic frontier model based on corrected ordinary least squares, estimated by three-stage least squares on a simultaneous equations model, is employed to derive the frontiers for the sampled banks as well as to estimate the causality between bank loans and deposits. Our findings suggest that, in an underdeveloped banking system such as Vietnam, bank deposits have a positive and significant impact on bank loans, but the reverse relationship is not significant. It is further suggested that in deposit-taking and loan-creating activities, Vietnamese banks performed moderately well over the period examined; however, in the near future, they should start to focus more on deposit-taking activities.
- ItemPredicting the performance of MSMEs: a hybrid DEA-machine learning approach(Springer Science+Business Media, LLC, 2023-02-14) Boubaker S; Le TDQ; Ngo T; Manita RMicro, small and medium enterprises (MSMEs) dominate the business landscape and create more than half of employment worldwide. How we can apply big data analytical tools such as machine learning to examine the performance of MSMEs has become an important question to provide quicker results and recommend better and more reliable solutions that improve performance. This paper proposes a novel method for estimating a common set of weights (CSW) based on regression analysis for data envelopment analysis (DEA) as an important analytical and operational research technique, which (i) allows for measurement evaluations and ranking comparisons of the MSMEs, and (ii) helps overcome the time-consuming non-convexity issues of other CSW DEA methodologies. Our hybrid approach used several econometric and machine learning techniques (such as Tobit, least absolute shrinkage and selection operator, and Random Forest regression) to empirically explain and predict the performance of more than 5400 Vietnamese MSMEs (2010‒2016), and showed that the machine learning techniques are more efficient and accurate than the econometric ones. Our study, therefore, sheds new light on the two-stage DEA literature, especially in terms of predicting performance in the era of big data to strengthen the role of analytics in business and management.
- ItemPrice reaction in New Zealand’s duopolistic airline market(Taylor and Francis Group, 2023-02-11) Ngo T; Tsui KWHThis study investigates the price reaction in a duopolistic market where two airlines (a full-service and a low-cost carrier) dominate the domestic aviation market. Utilising a rich dataset of 53,463 matched airfares for Air New Zealand and Jetstar in New Zealand from September to December 2019, we found a U-shaped relationship (from Jetstar to Air New Zealand) and an inverted U-shaped relationship (from Air New Zealand to Jetstar) between the two airfares. While distinguishing their different business models, such behaviour has not been empirically discussed in the literature. This study can be extended to larger and more complex markets.
- ItemRecognizing CEOs and Chairmen’s personality and bank performance: new insights from signature analysis(Taylor and Francis Group on behalf of the Chinese Economic Association – UK, 2024-03-30) Le TDQ; Ho TH; Ngo T; Luu TBThis study first uses graphology to examine the signatures of the CEOs and Chairmen of 26 commercial banks in Vietnam (2007-2020) to predict their personalities following the Big Five Personality model. Such personalities are used as a key explanatory variable to explain bank performance. Our findings extend the entrenchment theory that bank profitability is positively affected by the same personality traits of separate CEOs and Chairmen. More specifically, the findings indicate a positive relationship between bank profitability and conscientious and extraverted CEOs and Chairmen. When observing bank ownership, these two categories of personality traits are more critical to listed banks. As the first attempt to investigate whether separate CEO and chairman with the same characteristics may affect bank performance, our study will add more evidence to the existing literature about the relationship between corporate governance and bank profitability.
- ItemRevisiting the Quiet-Life Hypothesis in the Banking Sector: Do CEOs’ Personalities Matter?(MDPI (Basel, Switzerland), 2024-03-20) Le TDQ; Nguyen DT; Ngo T; Bolton BThis study investigates the relationship between market power and bank profitability, and the impacts of CEOs’ personality traits, in Vietnam from 2007 to 2020. The analysis of CEOs’ signatures is used to determine their characteristics. The findings support the quiet-life hypothesis, which suggests that the negative relationship between market power and bank profitability may depend on CEOs’ characteristics. More specifically, the results show that conscientious CEOs with market power tend to reduce bank profitability, and this effect is more pronounced for foreign-owned banks. Therefore, our findings have critical implications for bank management.