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Book part
Publication date: 24 April 2023

Yingqian Lin and Yundong Tu

This chapter develops an asymptotic theory for a general transformation model with a time trend, stationary regressors, and unit root nonstationary regressors. This model extends…

Abstract

This chapter develops an asymptotic theory for a general transformation model with a time trend, stationary regressors, and unit root nonstationary regressors. This model extends that of Han (1987) to incorporate time trend and nonstationary regressors. When the transformation is specified as an identity function, the model reduces to the conventional cointegrating regression, possibly with a time trend and other stationary regressors, which has been studied in Phillips and Durlauf (1986) and Park and Phillips (1988, 1989). The limiting distributions of the extremum estimator of the transformation parameter and the plug-in estimators of other model parameters are found to critically depend upon the transformation function and the order of the time trend. Simulations demonstrate that the estimators perform well in finite samples.

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Essays in Honor of Joon Y. Park: Econometric Theory
Type: Book
ISBN: 978-1-83753-209-4

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Book part
Publication date: 24 April 2023

Yixiao Sun

The author develops and extends the asymptotic F- and t-test theory in linear regression models where the regressors could be deterministic trends, unit-root processes…

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The author develops and extends the asymptotic F- and t-test theory in linear regression models where the regressors could be deterministic trends, unit-root processes, near-unit-root processes, among others. The author considers both the exogenous case where the regressors and the regression error are independent and the endogenous case where they are correlated. In the former case, the author designs a new set of basis functions that are invariant to the parameter estimation uncertainty and uses them to construct a new series long-run variance estimator. The author shows that the F-test version of the Wald statistic and the t-statistic are asymptotically F and t distributed, respectively. In the latter case, the author shows that the asymptotic F and t theory is still possible, but one has to develop it in a pseudo-frequency domain. The F and t approximations are more accurate than the more commonly used chi-squared and normal approximations. The resulting F and t tests are also easy to implement – they can be implemented in exactly the same way as the F and t tests in a classical normal linear regression.

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Book part
Publication date: 16 December 2009

Zongwu Cai, Jingping Gu and Qi Li

There is a growing literature in nonparametric econometrics in the recent two decades. Given the space limitation, it is impossible to survey all the important recent developments…

Abstract

There is a growing literature in nonparametric econometrics in the recent two decades. Given the space limitation, it is impossible to survey all the important recent developments in nonparametric econometrics. Therefore, we choose to limit our focus on the following areas. In Section 2, we review the recent developments of nonparametric estimation and testing of regression functions with mixed discrete and continuous covariates. We discuss nonparametric estimation and testing of econometric models for nonstationary data in Section 3. Section 4 is devoted to surveying the literature of nonparametric instrumental variable (IV) models. We review nonparametric estimation of quantile regression models in Section 5. In Sections 2–5, we also point out some open research problems, which might be useful for graduate students to review the important research papers in this field and to search for their own research interests, particularly dissertation topics for doctoral students. Finally, in Section 6 we highlight some important research areas that are not covered in this paper due to space limitation. We plan to write a separate survey paper to discuss some of the omitted topics.

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Nonparametric Econometric Methods
Type: Book
ISBN: 978-1-84950-624-3

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Book part
Publication date: 15 April 2020

Jianning Kong, Peter C. B. Phillips and Donggyu Sul

Measurement of diminishing or divergent cross section dispersion in a panel plays an important role in the assessment of convergence or divergence over time in key economic…

Abstract

Measurement of diminishing or divergent cross section dispersion in a panel plays an important role in the assessment of convergence or divergence over time in key economic indicators. Econometric methods, known as weak σ-convergence tests, have recently been developed (Kong, Phillips, & Sul, 2019) to evaluate such trends in dispersion in panel data using simple linear trend regressions. To achieve generality in applications, these tests rely on heteroskedastic and autocorrelation consistent (HAC) variance estimates. The present chapter examines the behavior of these convergence tests when heteroskedastic and autocorrelation robust (HAR) variance estimates using fixed-b methods are employed instead of HAC estimates. Asymptotic theory for both HAC and HAR convergence tests is derived and numerical simulations are used to assess performance in null (no convergence) and alternative (convergence) cases. While the use of HAR statistics tends to reduce size distortion, as has been found in earlier analytic and numerical research, use of HAR estimates in nonparametric standardization leads to significant power differences asymptotically, which are reflected in finite sample performance in numerical exercises. The explanation is that weak σ-convergence tests rely on intentionally misspecified linear trend regression formulations of unknown trend decay functions that model convergence behavior rather than regressions with correctly specified trend decay functions. Some new results on the use of HAR inference with trending regressors are derived and an empirical application to assess diminishing variation in US State unemployment rates is included.

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Article
Publication date: 1 August 1998

Jaroslav Mackerle

This paper gives a review of the finite element techniques (FE) applied in the area of material processing. The latest trends in metal forming, non‐metal forming, powder…

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This paper gives a review of the finite element techniques (FE) applied in the area of material processing. The latest trends in metal forming, non‐metal forming, powder metallurgy and composite material processing are briefly discussed. The range of applications of finite elements on these subjects is extremely wide and cannot be presented in a single paper; therefore the aim of the paper is to give FE researchers/users only an encyclopaedic view of the different possibilities that exist today in the various fields mentioned above. An appendix included at the end of the paper presents a bibliography on finite element applications in material processing for 1994‐1996, where 1,370 references are listed. This bibliography is an updating of the paper written by Brannberg and Mackerle which has been published in Engineering Computations, Vol. 11 No. 5, 1994, pp. 413‐55.

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Engineering Computations, vol. 15 no. 5
Type: Research Article
ISSN: 0264-4401

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Book part
Publication date: 8 August 2022

Narjess Aloui and Imen Sdiri

Customer experience (CX) has become a major concern of business managers around the world and is considered a determinant factor of continuing corporate success. Despite the…

Abstract

Customer experience (CX) has become a major concern of business managers around the world and is considered a determinant factor of continuing corporate success. Despite the growing number of research studies focusing on the topic, knowledge remains underexamined in general, and specifically in terms of online users. Understanding how online platforms inspire travel experience is increasingly pertinent as visual contents acquire insignificance. This is especially relevant when travel is restricted such as during the COVID-19 outbreak. Nevertheless, there is a gap in the literature research on online CX in online visitor attractions. The study aimed to investigate the visitors' reviews of online visits during the lockdown. The research has followed the Netnography approach as modern qualitative research to understand the online CX of visiting virtually the attractions.

The results revealed three dimensions of cyber-tourist experiences related to the tourism-driven with its four subdimensions, the emotional reaction and expectation, and satisfaction and behavior intentions. The study adds to the better knowledge of the modern research methods dealing with the cyber-customer experience (CCX) by examining the Netnography method.

This research is a pioneering attempt to mitigate the impact of COVID-19 on tourists' experience and to highlight the opportunities for tourism practitioners to profit from the online presence, to be more accessible, and to increase their traffic to guaranty their online visibility.

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Contemporary Approaches Studying Customer Experience in Tourism Research
Type: Book
ISBN: 978-1-80117-632-3

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Book part
Publication date: 22 December 2005

Young-Myon Lee and Michael Byungnam Lee

While the origin of Korean Industrial Relations goes back 150 years when the country opened its seaports to foreign countries, it didn’t emerge as a field of study until 1950s…

Abstract

While the origin of Korean Industrial Relations goes back 150 years when the country opened its seaports to foreign countries, it didn’t emerge as a field of study until 1950s when academics began to write books and papers on the Korean labor movement, labor laws, and labor economics. In this paper, we sketch this history and describe important events and people that contributed to the development of industrial relations in Korea. Korean industrial relations in the early 20th century were significantly distorted by the 35-year-Japanese colonial rule (1910–1945). After regaining its independence, the U.S. backed, growth-oriented, military-based, authoritarian Korean government followed suit and consistently suppressed organized labor until 1987. Finally, the 1987 Great Labor Offensive allowed the labor movement to flourish in a democratized society. Three groups were especially influential in the field of industrial relations in the early 1960s: labor activists, religious leaders, and university faculty. Since then, numerous scholars have published books and papers on Korean industrial relations, whose perspectives, goals, and processes are still being debated and argued. The Korean Industrial Relations Association (KIRA) was formed on March 25, 1990 and many other academic and practitioner associations have also come into being since then. The future of industrial relations as a field of study in Korea does not seem bright, however. Issues regarding organized labor are losing attention because of a steadily shrinking unionization rate, changing societal attitude toward labor unions, and the enactment of new and improved laws and regulations regarding employment relationships more broadly. Thus, we suggest that emerging issues such as contingent workers, works councils and tripartite partnership, conflict management, and human rights will be addressed by the field of industrial relations in Korea only if this field breaks with its traditional focus on union and union–management relations.

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Advances in Industrial & Labor Relations
Type: Book
ISBN: 978-0-76231-265-8

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Book part
Publication date: 24 April 2023

Yoonseok Lee and Donggyu Sul

The authors develop a novel forecast combination approach based on the order statistics of individual predictability from panel data forecasts. To this end, the authors define the…

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The authors develop a novel forecast combination approach based on the order statistics of individual predictability from panel data forecasts. To this end, the authors define the notion of forecast depth, which provides a ranking among different forecasts based on their normalized forecast errors during the training period. The forecast combination is in the form of a depth-weighted trimmed mean. The authors derive the limiting distribution of the depth-weighted forecast combination, based on which the authors can readily construct prediction intervals. Using this novel forecast combination, the authors predict the national level of new COVID-19 cases in the United States and compare it with other approaches including the ensemble forecast from the Centers for Disease Control and Prevention (CDC). The authors find that the depth-weighted forecast combination yields more accurate and robust predictions compared with other popular forecast combinations and reports much narrower prediction intervals.

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Essays in Honor of Joon Y. Park: Econometric Methodology in Empirical Applications
Type: Book
ISBN: 978-1-83753-212-4

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Book part
Publication date: 21 July 2011

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Curbing Corruption in Asian Countries: An Impossible Dream?
Type: Book
ISBN: 978-0-85724-819-0

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Book part
Publication date: 17 June 2016

Bong Gun Chung

The purpose of this chapter is to critically review the Korean Official Development Assistance (ODA) policy in terms of its context, actors, structures, and values so as to find…

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The purpose of this chapter is to critically review the Korean Official Development Assistance (ODA) policy in terms of its context, actors, structures, and values so as to find how these characteristics are reflected in the education ODA of Korea. Previous studies, documents of Korean Government, and ODA-related statistics are reviewed. Self-confident in being transformed from a poor recipient country to a DAC donor, Korean government emphasizes the so-called Korean ODA Model in sharing its economic development knowledge and experiences with the developing countries. Despite the coordination effort by Prime Minister’s Office, government ministries tend to pursue its own ODA policies, while the finance ministry and the ministry of foreign affairs play major roles. As a result Korean ODA is economy-oriented, fragmented, and uncoordinated in planning and implementation. This study has found that such characteristics of Korean ODA are also reflected in the education ODA. For instance, TVET and higher education are the priority, while basic education is neglected, and the education ministry has its own ODA policies and programs. Outside studies on Korean ODA policy is rather scarce, furthermore, critical reviews other than policy advocacy are hard to find, particularly in English. This study will be a good start for further ones to understand the Korean ODA policy including education.

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Post-Education-Forall and Sustainable Development Paradigm: Structural Changes with Diversifying Actors and Norms
Type: Book
ISBN: 978-1-78441-271-5

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