Mining History of Gamification Towards Finding Expertise in Question and Answering Communities: Experience and Practice with Stack Exchange

Recently, an online Q&A tool has become an essential part of individual communities and organizations of experts on specific topics. Using the answers to questions about specific topics will help such communities work more efficiently in their fields. Currently, Q&A online communities are adopting gamification to engage users by granting awards to successful users. In this paper, we investigate how to mine award achievement histories to find expertise. We propose the use of sequence analysis and clustering techniques. Specifically, we study the history of Stack Exchange, a large Q&A community that employs gamification. To the best of our knowledge, this is the first study of using award achievement history to find expertise in Q&A communities.     

Mass media effects on trading activities: television broadcasting evidence from Japan

This study examines how information broadcasting through television (TV) media influences stock market activities. Consistent with the effect of TV information to attract investor attention, we find that increased information flow through TV is significantly associated with greater trading volume and larger price change. For information type, hard news from business-oriented programmes and earnings-related news strongly contributes to the attention effect, while the effect of soft news is weaker. Bid–ask spread widens for more TV information flows, suggesting that new information arrival in the market expands information asymmetry. Finally, the impact of TV is more influential for stocks with more individual shareholders than those with institutional shareholders.     

Exchange rates and ownership structure of Japanese multinational firms

This paper investigates the determinants of Japanese multinationals’ ownership structures. Unlike most previous studies that neglect the impact of financial constraints on ownership, we add the exchange rate as a measure of wealth and test whether exchange rates affect the ownership share of foreign direct investment projects. After controlling for other variables that affect ownership, we find that exchange rates have a significant effect on the likelihood of wholly owned subsidiaries. We also discuss several other explanations for the link between exchange rates and foreign direct investment and provide evidence that the link stems from capital-market imperfections.     

Does aid affect inequality?

We show that there was a negative correlation between pro-poor aid and inequality in the period before the mid-2000s. This article provides an explanation for this observed relationship. Using panel data on 34 countries for the period 1996–2014, we test the hypothesis that pro-poor aid has an inequality-reducing effect. To demonstrate that the negative correlation is not spurious, we use dynamic panel techniques with alternative specifications. We show that the share of pro-poor aid has a negative effect on inequality. In addition, we show that the interaction term between the poverty rate and the change in pro-poor aid has a significant effect. These empirical results are consistent with our theoretical predictions. The results imply that aid can reduce inequality by altering the allocation of aid, rather than by increasing the amount of aid.     

Aid effectiveness,governance and public investment

In this paper, we develop a growth model in which aid finances infrastructure investment and pro-poor spending in order to analyze ways through which aid can be made more effective. We assume that the recipient countries are aid-dependent in the early phase of development and that they ultimately become independent. In the model, donors can accelerate a recipient's independence from aid by investing in infrastructure. We demonstrate that even a small increase in aid can improve aid effectiveness and that aid effectiveness depends more on the growth rate than on the efficiency of the government.     

Effects of a short-stay vacation on the mental health of Japanese employees*

Many studies have focused on the effects of tourism on mental health. This study revealed that short-stay vacations at mental health rejuvenation facilities could reduce Japanese employees’ stress levels. We conducted two studies with two groups of participants (N?=?34 and 26, respectively), in order to obtain both objective and subjective evaluations. The results suggested that taking a short-stay vacation at a mental health rejuvenation facility was effective for helping employees to maintain good mental health, and that stress reduction was particularly evident in the highly stressed group. Practical and theoretical implications are discussed with a view to providing suggestions for addressing work-related stress in Japanese employees.     

International business alliances: an incomplete contract approach

This paper is an attempt to utilize an incomplete contract approach to explain various forms of alliances in international business. We present a simple model of vertical integration as internalization. It provides theoretical foundations to understand the multinational enterprise's choice between inter-firm transactions and intra-firm transactions. In a simple framework, we provide a rationale for joint ventures, original equipment manufacturing (OEM), cross-licensing and divestment by focusing on the subcontractor's incentives. Moreover, we discuss transfer pricing and some policies such as incentives, taxation, and local content requirements.