Correction to: The impact of parental illness on children’s schooling and labour force participation: evidence from Vietnam

Review of Economics of the Household - The original version of this article unfortunately contained some errors in reference citations and in significance indicators in some of the tables. These...     

How rival partners compete based on cooperation?

Prior studies of coopetition have explained the what, how and why of firms cooperating with competitors. Among these, examining the how question as to the stream of coopetition dynamics is the most challenging theme. Previous research has focused much more on the cooperation side. Less attention has been paid to the competition side to reveal what happens to competition after the competitors have collaborated. This study sheds light on the issue of cooperation-based competition by answering the question: while cooperating with competitors, how do rival partners compete based on cooperation? Linking the competitive dynamics perspective to coopetition, we conducted a single-case study to analyse the competition between two leading competitors in the Taiwanese bicycle industry. We collected the reported issues pertaining to the competition in the European market and supported by in-depth interviews. The analysis leads us to develop three propositions and a conceptual framework for illustrating the cooperation-based competition and addressing how cooperation may influence competition in a coopetition relationship. This study provides new insights into a theoretical issue of cooperation-based competition. The case also provides management implications while taking a coopetition strategy.     

Bound and exact methods for assessing link vulnerability in complex networks

Assessing network systems for failures is critical to mitigate the risk and develop proactive responses. In this paper, we investigate devastating consequences of link failures in networks. We propose an exact algorithm and a spectral lower-bound on the minimum number of removed links to incur a significant level of disruption. Our exact solution can identify optimal solutions in both uniform and weighted networks through solving a well-constructed mixed integer program. Also, our spectral lower-bound derives from the Laplacian eigenvalues an estimation on the vulnerability of large networks that are intractable for exact methods. Through experiments on both synthetic and real-world networks, we demonstrate the efficiency of the proposed methods.     

A New Family of BAN Estimators for Polytomous Logistic Regression Models based on ϕ- Divergence Measures

In this paper we study polytomous logistic regression model and the asymptotic properties of the minimum ϕ-divergence estimators for this model. A simulation study is conducted to analyze the behavior of these estimators as function of the power-divergence measure ϕ_(λ) Research partially done when was visiting the Bowling Green State University as the Distinguished Lukacs Professor     

POST-REFORM INDUSTRIAL PRODUCTIVITY PERFORMANCE OF CHINA: NEW EVIDENCE FROM THE 1985 INDUSTRIAL CENSUS DATA

Beginning in the late 1970s, a series of reforms to improve industrial productivity were implemented in China. We estimate changes in productivity growth and identify its sources in the post-reform period 1980-85. Our work is based on the newest and most comprehensive data set available on Chinese industrial activities. Productivity growth estimates are shown to be strongly affected by output specification. Overall, we find sharp increases in productivity growth in the 1984-85 period as compared to the 1980-84 period. Collective and private enterprises show higher output and productivity gains than do state-owned enterprises.     

“I Am Tired But If I Don't Try to Have Sex,My Wife Will Think I've Been Fooling around in the City”: Work,Migration, and Sex Among Vietnamese Migrant Laborers

Mostly operating from a risk and risk-reduction paradigm, existing research on migrants in Vietnam tends to conceptualize sex and risky sexual behaviors as isolated life domains. This study begins to develop a contextually rich understanding of migrants’ sex lives by examining the relationships among sex, work, and the constant pendulum-like migrating movements of 23 Vietnamese married migrants in Hanoi and Ho Chi Minh City. Using data from in-depth interviews, it was found that most participants had no sex in the city; this was followed by visits to the home village, where they had sex with their spouses as often as possible to make up for the “long drought” in the city. Within this sexual schema, sex came secondary, and even peripherally, to migrants’ working lives; thus, exhaustion from work was cited by migrants as the overwhelming factor leading to their sexual problems. This study suggests that migrants’ intimate lives are more strongly linked to their working lives than has previously been recognized, and that their sexual behaviors should be viewed in tandem with the hardships of their working lives.     

Validation of multidimensional scale of perceived social support in middle-aged Korean women with diabetes

Purpose: The purpose of this study was to validate the Multidimensional Scale of Perceived Social Support (MSPSS) among middle-aged Korean women with type 2 diabetes. Methods: Data were collected from 123 middle-aged Korean women with diabetes. Construct and concurrent validity were examined using factor analysis. Results: Factor analysis extracted three factors: spouse, family, and friends. The MSPSS had relatively good concurrent validity (r = .66, p < .0001), construct validity, and strong reliability (Cronbach's alpha = .90). Conclusion: We concluded that the MSPSS is a simple and well-established instrument to measure social support in middle-aged Korean women with diabetes.     

The inverse 1-center problem on trees with variable edge lengths under Chebyshev norm and Hamming distance

This paper addresses the problem of modifying the edge lengths of a tree in minimum total cost such that a prespecified vertex becomes the 1-center of the perturbed tree. This problem is called the inverse 1-center problem on trees. We focus on the problem under Chebyshev norm and Hamming distance. From special properties of the objective functions, we can develop combinatorial algorithms to solve the problem. Precisely, if there does not exist any vertex coinciding with the prespecified vertex during the modification of edge lengths, the problem under Chebyshev norm or bottleneck Hamming distance is solvable in \(O(n\log n)\) time, where \(n+1\) is the number of vertices of the tree. Dropping this condition, the problem can be solved in \(O(n^{2})\) time.