Quan Le‐Trung, Paal E. Engelstad, Vinh Pham, Tor Skeie, Amirhosein Taherkordi and Frank Eliassen
The purpose of this paper is to describe the required functionalities on providing internet connectivity and mobility management for mobile ad hoc networks (MANETs), present…
Abstract
Purpose
The purpose of this paper is to describe the required functionalities on providing internet connectivity and mobility management for mobile ad hoc networks (MANETs), present discovered problems such as inconsistent contexts, and provide the corresponding solutions. It also provides a hybrid metric for the load‐balance of intra/inter‐MANET traffic over multiple internet gateways (IGWs).
Design/methodology/approach
The paper uses both mathematical analyses and simulations to discover the required functionalities and problems on providing internet connectivity and mobility management for MANETs. The proposed hybrid metric for IGW selection is a replacement of the shortest hop‐count (HC) metric, and consider three factors: HC distance, intra‐MANET traffic, and inter‐MANET traffic.
Findings
Simulation results show that ad hoc routing protocols, using the proposed metric, get better performance in terms of packet delivery ratio and transmission delay, at the cost of slightly increased signalling overhead.
Research limitations/implications
In the assessment, simulation results are taken from two mobility scenarios, and the hybrid metric is integrated into only reactive ad hoc routing. Thus, more case studies need to be carried out to demonstrate the outcomes of the proposed metric compared with others.
Practical implications
This paper provides the needed functionalities for broadening the richness of MANET applications to internet users, and vice verse.
Originality/value
This paper contributes to the research on internetworking and mobility management between MANETs and the internet.
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Hai Thanh Pham, Huy Truong Quang, Paulo Sampaio, Maria Carvalho, Duy Le Anh Tran, Vinh Xuan Vo and Binh An Thi Duong
This paper aims to identify and assess global risks in the supply chain performance.
Abstract
Purpose
This paper aims to identify and assess global risks in the supply chain performance.
Design/methodology/approach
First, global risks are identified and classified according to three criteria: content, probability and context. A set of supply chain performance indicators are then defined by the theory of resource-based view and balanced scorecard. Structural equation modeling is adopted to access risks in the global supply chain.
Findings
This article contributes to the supply chain risk management literature by providing a detailed operationalization of global supply chain risk constructs, e.g. natural disasters, war and terrorism, fire accidents, economic and political instability, social and cultural grievances, decease. Empirical results reveal that the supply chain is predominantly regarded as being vulnerable as the proposed model of risks can explain up to 12.6% variance of supplier performance, 25.2% innovation and learning, 23% internal business, 40.6% customer service and 32.4% finance.
Research limitations/implications
These risks are relevant contextual variables in strategic supply chain decisions. Supply chain managers should keep in mind acceptable cost/benefit tradeoffs in their firms' mitigation efforts associated with major contingency risks. This research advocates the allocation of scarce resources to adopt the supply chain strategies of avoidance, speculative and postponement.
Originality/value
The application of the strategic content/process/context to explain global supply chain performance is an interesting approach. Moreover, globalization trends and the COVID-19 perspectives are considered to be the main reasons for increasing such complex factors. Data on validating research models collected during the COVID-19 pandemic reflect the topicality of this study.
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Khoi Kim Dang, Thiep Huy Do, Thi Ha Lien Le, Thi Thu Hang Le and Thinh Duc Pham
The Vietnamese Mekong River Delta (VMD) is one of the most affected deltas by climate change in the world. Several studies have investigated factors influencing farmers' climate…
Abstract
Purpose
The Vietnamese Mekong River Delta (VMD) is one of the most affected deltas by climate change in the world. Several studies have investigated factors influencing farmers' climate change adaptation behaviors in the region; however, little is known about the effectiveness of such measures. This paper examines the determinants of adaptation strategies among VMD rice farmers and assesses the impacts of such practices on rice yield.
Design/methodology/approach
Endogenous switching regressions were employed using a survey data of 300 rice-producing households in An Giang and Tra Vinh provinces in 2016.
Findings
The results show that farmers receiving early disaster warnings are more likely to adopt adaptation measures to climate change. If nonadaptors had chosen to respond, their rice yield would have increased by 0.932 tons/ha/season.
Research limitations/implications
The data sample is small and collected from two provinces in the VMD only; therefore, the results may be specific for the study sites. However, future research can adopt the proposed method for other regions.
Originality/value
The study estimates the production impacts of farmers' decisions on whether or not to adapt to extreme climate events. The proposed approach allows for capturing both observed and unobserved behaviors.
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Danh Vinh Le, Huong Thi Thu Le, Thanh Tien Pham and Lai Van Vo
The purpose of this paper is to examine the effect of innovation on the performance of small and medium-sized enterprises (SMEs) in Vietnam.
Abstract
Purpose
The purpose of this paper is to examine the effect of innovation on the performance of small and medium-sized enterprises (SMEs) in Vietnam.
Design/methodology/approach
The paper uses data from the surveys on SMEs in Vietnam conducted by the Development Economics Research Group at the University of Copenhagen, the United Nations University’s World Institute for Development Economics Research, Central Institute for Economic Management and Institute of Labor Science and Social Affairs, and applies least squared regressions and 2SLS regressions to examine the effect of innovation on the performance of SMEs.
Findings
The authors find that SMEs with innovation tend to perform better than SMEs without innovation. The authors further show that the positive effect of innovation on firm performance mainly comes from the effect of improvement of existing products, an important type of innovation in SMEs. This result is persistent when the authors use propensity matching score and 2SLS regression with instrumental variable approaches. Overall, the results show the important role of innovation in enhancing the firm performance of SMEs, which sheds light on the literature on the controversial relation between innovation and SMEs performance in the world.
Research limitations/implications
The major limitation of the paper is the lack of data. Although the database used in the paper is widely used to analyze SMEs in Vietnam, it covers about 2,500 firms in only nine provinces/cities in Vietnam.
Practical implications
Policymakers should enact relevant policies to support SMEs with innovation activities, thereby increasing firm performance and their competitiveness. For instance, encouragement policies or financial incentives (tax reduction or subsidies) for innovative firms should be implemented and/or fostered.
Originality/value
To the best of the authors’ knowledge, this is the first paper to examine the effect of different types of innovation on the performance of SMEs in Vietnam.
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Nguyen Vinh Khuong, Doan Thi Ngoc Anh, Pham Minh Nhu, Tai Vu Tran Trong, Nguyen Thi Kieu Trang and Dang Hoang Kha Thy
This study aims to examine the relationship between key audit matters (KAMs) and the restatement of financial statements, assessing their impact on the financial statement…
Abstract
Purpose
This study aims to examine the relationship between key audit matters (KAMs) and the restatement of financial statements, assessing their impact on the financial statement restatement process.
Design/methodology/approach
This study aims to examine the economic context of Vietnam by analyzing data from 170 listed enterprises on the Vietnam stock exchange from 2010–2021. Feasible generalized least squares and robustness regression are conducted to give results and conclusions.
Findings
The results show that the KAMs disclosure in the financial statements has not really significantly affected the quality of an audit, so the KAMs disclosure does not have too much impact on the restatement of financial statements. However, this study found that the number of disclosed KAMs would partly reflect the shortcoming that exists in companies' financial statements.
Practical implications
The authenticity of financial statements is crucial for companies to meet auditor requirements, particularly KAMs. Restatements can influence business decisions and provide more accurate financial information to stakeholders. Thus, studying the impact of KAMs on restatement is essential for improving the veracity and reliability of financial statements.
Originality/value
This study clarifies the important role of KAMs in financial statements to recommend investors to be more careful in considering KAMs disclosed by auditors in audit reports. In addition, this study helps to add an overview of KAMs in emerging markets like Vietnam, as well as helps stakeholders to improve the legal system on Accounting – Auditing in Vietnam.
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Ho Xuan Thuy, Nguyen Vinh Khuong, Le Huu Tuan Anh and Pham Nhat Quyen
This study aims to investigate the association between corporate governance (CG) and the corporate social responsibility (CSR) information disclosure as well as the moderating…
Abstract
Purpose
This study aims to investigate the association between corporate governance (CG) and the corporate social responsibility (CSR) information disclosure as well as the moderating role of state-ownership between CG and CSR disclosure.
Design/methodology/approach
To examine the relationship between CG and CSR disclosure, this study used the feasible general least squares and generalized method of moments method on a sample of 165 non-financial quoted companies over the 2015–2018 period, which account for about three-fourths of the Vietnamese stock exchange.
Findings
The findings suggest that enterprises with smaller board size consisting mainly of independent directors have a higher CSR disclosure level. Moreover, when the chief executive officer is concurrently the chairman of the board, the level of CSR disclosure falls. Additionally, the moderating role of state ownership enhances CSR disclosure.
Research limitations/implications
The empirical results of this study form a solid foundation for policymakers and other stakeholders’ decisions in investing or establishing policies.
Originality/value
This study provides empirical evidence on the relationship between CG and CSR disclosure in Vietnam – a developing country with no legal requirement on CSR disclosure. Moreover, this study emphasizes the moderating role of state ownership between CG and CSR disclosure, which clarifies the role of state ownership in establishing CG mechanisms.
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Vinh Xuan Bui and Hang Thu Nguyen
The purpose of this paper is to investigate the impacts of investor attention on stock market activity.
Abstract
Purpose
The purpose of this paper is to investigate the impacts of investor attention on stock market activity.
Design/methodology/approach
The authors employed the Google Search Volume (GSV) Index, a direct and non-traditional proxy for investor attention.
Findings
The results indicate a strong correlation between GSV and trading volume – a traditional measure of attention – proving the new measure’s reliability. In addition, market-wide attention increases both stock illiquidity and volatility, whereas company-level attention shows mixed results, driving illiquidity and volatility in both directions.
Originality/value
To the best of the authors’ knowledge, Nguyen and Pham’s (2018) study has been the only previous study identifying investor attention in Vietnam by using GSV as a proxy and examining the impacts of broad search terms about the macroeconomy on the stock market as a whole – on stock indices’ movements. The paper will contribute to this by quantifying GSV impacts on each stock individually.
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Hung Gia Hoang and Duc Van Nguyen
The purpose of this paper is to examine factors that shape the adoption of mobile phones for vegetable marketing by Vietnamese smallholders.
Abstract
Purpose
The purpose of this paper is to examine factors that shape the adoption of mobile phones for vegetable marketing by Vietnamese smallholders.
Design/methodology/approach
A structured questionnaire was given to 185 smallholders randomly chosen from 345 vegetable smallholders in the Vinh Thanh district of Vietnam. Descriptive statistics, inferential statistics and a binary logistic regression were applied to analyse the data.
Findings
The research results show that the smallholders’ adoption of mobile phones for vegetable marketing is significantly affected by their number of extension contacts, distance from smallholders’ homes to local markets, community-based organisation participation, gender, training/credit programme participation, age, education level, income and farm size (χ2 = 143,111, p < 0.000).
Practical implications
A combination of factors related to socio-economic, situational and institutional characteristics of smallholders should be considered when promoting smallholders’ uptake of mobile phones for vegetable marketing in developing nations.
Originality/value
This research provides useful insights into the determinants of mobile phone adoption for vegetable marketing by smallholders and highlights areas that need to be considered when designing policies to improve the uptake of information and communication technologies in developing countries.
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This paper aims to provide a deep understanding of rural household livelihoods in the Mekong Delta and to explore how they can cope with climate stressors at the ground level.
Abstract
Purpose
This paper aims to provide a deep understanding of rural household livelihoods in the Mekong Delta and to explore how they can cope with climate stressors at the ground level.
Design/methodology/approach
The paper employs the sustainable livelihood framework at a household and also an individual scale. The general data obtained from a survey of 2,100 households provide an overview of their livelihoods. Qualitative and quantitative methods were adopted, as case studies, to comprehensively assess 100 households in one commune affected by annual floods and an additional 100 households in another commune affected by sea level rises. Livelihood profile analysis is beneficial to identify specific livelihood change patterns that have taken place in these specific cases.
Findings
There are four types of livelihood adaptation to climate stressors: (1) change of structure of agricultural systems, (2) change of employment locations, (3) resettlement with strong impact on livelihoods and (4) out-migration. The household livelihood resources and the local economic structures have significant roles in driving adaptive solutions.
Research limitations/implications
This paper provides detailed profiles of the livelihood change considered as passive adaptation of smallholders in the Mekong Delta.
Originality/value
It contributes to the knowledge of rural households in multiple aspects with regard to how they cope with climate change via reflection on their livelihoods.