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Article
Publication date: 7 October 2019

Huy Le Quang and Binh Tran-Nam

The purpose of this paper is to investigate the incidence and earning effects of the vertical mismatch between attained and required educational qualifications in a…

Abstract

Purpose

The purpose of this paper is to investigate the incidence and earning effects of the vertical mismatch between attained and required educational qualifications in a developing country’s labor market.

Design/methodology/approach

Following Duncan and Hoffman (1981), this paper uses the augmented Mincerian wage equation to decompose the actual years of education of a person into years of over-education, years of required education and years of under-education. These years of education are then fitted in an ordinary least squares model to measure the earning effects of an employee when his/her attained educational qualifications are higher or lower than the required educational level in his/her job.

Findings

Unlike studies in developed countries, this paper finds that Vietnam has a higher incidence of under-education than over-education due to a large proportion of the population in rural and remote areas not having access to formal education. Further, qualification mismatch has an asymmetric effect on earnings in the sense that the wage rate is flexible downward but rigid upward. In particular, years of schooling that are in excess or in deficit of the required level for the job are not compensated with higher earnings. This paper concludes that although qualification mismatch incidence in Vietnam is different from that in developed countries, mismatched workers also suffer from significant wage penalty.

Originality/value

This paper makes a significant contribution by providing the first evidence from a developing country to the vertical mismatch literature which has already been overwhelmed with studies from advanced economies.

Details

Journal of Economics and Development, vol. 21 no. 2
Type: Research Article
ISSN: 2632-5330

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Article
Publication date: 4 July 2016

Justin Marcus, Barbara Ann Fritzsche, Huy Le and Michael Dennis Reeves

– The purpose of this paper is to focus on developing and validating a multidimensional measure of work-related age-based stereotypes (WAS) scale.

Abstract

Purpose

The purpose of this paper is to focus on developing and validating a multidimensional measure of work-related age-based stereotypes (WAS) scale.

Design/methodology/approach

Based upon a review of the literature, a three-dimensional stereotype content model including both negative (incompetence, inadaptability) and positive (warmth) stereotypes of older workers was created. Construct, convergent, discriminant, and criterion-related validity for the WAS scale were examined across three independent samples constituting both lab-based experimental studies and a field-based survey (total n=1,245).

Findings

Across all samples, the WAS evidenced good construct, convergent, discriminant, and criterion-related validity.

Originality/value

As evidenced by a review of the literature, the WAS is unique in that it measures both negative and positive stereotypes of older workers. Implications for research are discussed.

Details

Journal of Managerial Psychology, vol. 31 no. 5
Type: Research Article
ISSN: 0268-3946

Keywords

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Article
Publication date: 23 January 2020

Sikander Hans and Smarajit Ghosh

The efficient speed controller is found to be an important requirement to run the motor for the brushless direct current (BLDC) motor. This requirement is considered as…

Abstract

Purpose

The efficient speed controller is found to be an important requirement to run the motor for the brushless direct current (BLDC) motor. This requirement is considered as superior, as it may increase the operating speed and system efficiency. In the existing methods, proportional plus integral (PI) controller has been included because of its simple architecture. But the PI controller produces load disturbance, control complexity and some parametric (Proportional plus integral) variations. The purpose of this proposed controller is to overcome the problems produced by PI controller in BLDC motor.

Design/methodology/approach

The proposed BLDC motor is developed with fixed order H-infinity controller. In this architecture, both the weight functions and transfer functions were included to design the controller. This controller has been included in this BLDC to detect the rotor position. The optimal position of rotor is identified by introducing particle swarm optimization algorithm.

Findings

The torque that obtained in the motor is highly reduced by this proposed controller and also enhances the speed. The BLDC motor is modelled in a MATLAB environment.

Practical implications

The performance of the torque, speed and back electro-motive force is analysed and compared with the existing controllers such as fuzzy proportional plus integral plus derivative, sensing algorithm and fuzzy proportional plus derivative controller.

Originality/value

Simulation results show that the proposed technique gives better results than the other existing controllers.

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Abstract

Details

Review of Marketing Research
Type: Book
ISBN: 978-0-85724-727-8

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Article
Publication date: 18 May 2020

Taisiia I. Krishtaleva, Elena A. Gureeva, Liliya A. Kripakova, Inna N. Rykova and Yuriy A. Krupnov

The purpose of the paper is to develop a risk-oriented approach to managing the social market economy.

Abstract

Purpose

The purpose of the paper is to develop a risk-oriented approach to managing the social market economy.

Design/methodology/approach

The first task is to determine the differences in susceptibility to the risk of the social market economy as compared to “pure” market economy. The authors use comparative analysis, variation analysis and correlation analysis for determining the dependence between quality of life in 2020 and variation of quality of life in 2012–2020, as well as variation of gross domestic product per capita in 2012–2020. The second task is to determine the perspectives of risk management of the social market economy in view of the specifics of the risk component of its functioning and development. Regression analysis is used for determining the dependence of quality of life in top ten countries with the social market economy in 2020 in the key risk factors that are peculiar for market economy and that lead to its destabilization: globalization, innovations and digitization.

Findings

It is substantiated that the unique economic and social environment predetermines the specific influence of the factors that are peculiar for the modern market economy. It is proved – by the example of top ten social market economies in 2020 – that social factors are more important for provision of stability of the social market economy than economic factors.

Originality/value

A risk-oriented approach to managing the social market economy is developed; it takes into account the specifics of the risk component of its functioning and development. The offered approach showed that the social market economy requires indirect regulation of risks through correction of institutions.

Details

International Journal of Sociology and Social Policy, vol. 41 no. 1/2
Type: Research Article
ISSN: 0144-333X

Keywords

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Article
Publication date: 11 January 2021

Le Hong Trang, Tran Duong Huy and Anh Ngoc Le

Pricing on the online booking systems is a difficult task for the host, the systems usually set the prices that are lower than the general premises and quality, and that…

Abstract

Purpose

Pricing on the online booking systems is a difficult task for the host, the systems usually set the prices that are lower than the general premises and quality, and that only gives benefits to the system by easily attracting the customer to use the service. The setting price of the new accommodation is often based on location, the number of beds, type of house and so on. The main problem is to predict the most reasonable price for the host. This paper aims to study the use of machine learning and sentiment analysis for predicting the price of online booking systems.

Design/methodology/approach

In particular, an empirical study is performed first for some well-known classification models for the problems. The authors then propose to apply k-means, a clustering technique, together with Gradient Boost and XGBoost models to improve the prediction performance. Experiments are conducted and tested for real Airbnb data sets collected in London City.

Findings

Experimental results are given and compared to show that the authors’ method outperforms to an updated method.

Originality/value

The authors use k-means and sampling together with Gradient Boost and XGBoost models to improve the prediction performance.

Details

International Journal of Web Information Systems, vol. 17 no. 1
Type: Research Article
ISSN: 1744-0084

Keywords

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Article
Publication date: 7 September 2021

Wen Pan Fagerlin and Yueqi Wang

The purpose of this study is to map different kinds of tensions in product innovation and investigate how top managers use communication to shape subordinates' attention…

Abstract

Purpose

The purpose of this study is to map different kinds of tensions in product innovation and investigate how top managers use communication to shape subordinates' attention and thereby respond to these tensions.

Design/methodology/approach

This study adopted an embedded case study of four innovation centers within a Nordic multinational firm.

Findings

This study identifies three kinds of tensions that reside in product innovation, namely dilemma, paradox and trade-off. Further, this study reveals how joint attention (among top managers and subordinates) as a response to tensions can be achieved through different aggregates of top managers' communication efforts.

Originality/value

In opening the black box of tensions in product innovation and identifying multiple tensions, this study contributes to advancing the understanding of the attention-based view. Different from previous studies that simply consider communication as channels for information processing, the findings indicate that the contents and practices of communication can help top managers to shape subordinates' attention and thereby respond to tensions. This study also extends the research focus of attention from top managers to the whole organization, by revealing the importance of building a joint pattern of attention among top managers and subordinates.

Details

Baltic Journal of Management, vol. 16 no. 1
Type: Research Article
ISSN: 1746-5265

Keywords

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Article
Publication date: 15 September 2020

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'…

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.

Details

Journal of Agribusiness in Developing and Emerging Economies, vol. 11 no. 1
Type: Research Article
ISSN: 2044-0839

Keywords

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Article
Publication date: 1 September 2001

J. Schutz, L. Gerbaud, J. Roudet and C. Larouci

The paper deals with the sizing of a flyback converter. The approach proposes to use symbolic calculation to perform sizing times, the accuracy and the number of…

Abstract

The paper deals with the sizing of a flyback converter. The approach proposes to use symbolic calculation to perform sizing times, the accuracy and the number of parameters to size. So, it presents a symbolic model to size a flyback converter using optimisation techniques. Such an approach is preferred to a simulation approach thanks to the flexibility of symbolic models and their possibility to treat a great set of criteria in few seconds or minutes. The expressions of a great part of the criteria are made by an automatic symbolic process – model builders – and the others are carried out by the designer. Such a model is used in a gradient optimisation process well known for its convergence properties. From this model, a builder carries out automatically the building of a dedicated sizing tool, by automatically transforming it into an optimisation problem and by automatically giving the corresponding sizing tool with its GUI.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 20 no. 3
Type: Research Article
ISSN: 0332-1649

Keywords

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Article
Publication date: 1 September 2001

L. Gerbaud, E. Atienza, A. Bolopion and J. Fandino

The paper deals with the sizing of controlled converter applications, with possibly, closed control loops, by combining several tools. The approach proposes to use…

Abstract

The paper deals with the sizing of controlled converter applications, with possibly, closed control loops, by combining several tools. The approach proposes to use symbolic calculation to perform sizing times, but also numerical calculation when symbolic expressions do not exist. The sizing model is deduced from criteria on the components (control values, average values, losses, rms values, maximum values, durations, etc.). The approach is based on two development environments: Gentiane for the modelling and simulation and Eden for the optimisation.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 20 no. 3
Type: Research Article
ISSN: 0332-1649

Keywords

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