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Inverted U-shaped Relationship (inverted + u-shaped_relationship)
Selected AbstractsArbitrage, Liquidity, and the Valuation of Exchange Traded FundsFINANCIAL MARKETS, INSTITUTIONS & INSTRUMENTS, Issue 5 2008Lucy F. Ackert This paper investigates the performance of U.S. and country exchange traded funds currently traded in the United States and provides new insight into their pricing. While the U.S. funds are priced closely to their net asset values, the country funds are not and can exhibit large, positive autocorrelations in fund premium. The mispricing of country funds is related to momentum, illiquidity, and size effects. We also find an inverted U-shaped relationship between fund premium and market liquidity, which suggests that more active trading does lead to lower mispricing but only after a certain level of liquidity is reached. [source] Glycated Hemoglobin Levels and Intellectual Activity in an Aged PopulationJOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 12 2005Hidenori Amano MHSc Objectives: To examine the association between glycated hemoglobin (GHb) and aspects of daily activities in an elderly population. Design: Cross-sectional population-based survey. Setting: Nangai village, an agricultural community with a population of about 5,000 located in Akita prefecture in the north of Japan. Participants: Nine hundred thirty-five people aged 65 and older. Measurements: GHb percentages, self-reported measures of activities of daily living (ADLs) and instrumental activities of daily living (IADLs), intellectual activity (IA), and social role (SR). Results: An exploratory analysis indicated that nondiabetic subjects in the lowest tertile of GHb tend to have lower IA than those in the middle tertile, if they were aged 70 and older. No consistent association appeared between GHb and ADLs, IADLs, or SR. Linear and logistic regression analyses, controlling for other risk factors, indicated significantly lower IA scores in the low and high GHb tertiles (P<.001 and P=.04, respectively) than in the middle in nondiabetic subjects aged 70 and older and without stroke history or IADL impairments. The value of GHb related to the maximal IA score was 5.0% to 5.2% as the middle tertile; or 5.2%, assuming a logistic regression model including a squared term with GHb as a continuous variable. A similar relationship was observed in the whole nondiabetic sample aged 70 and older but not in the younger counterpart. Conclusion: There is an inverted U-shaped relationship between GHb and intellectual activity in older people without diabetes mellitus. One possible interpretation is that suboptimal blood glucose could contribute to intellectual inactivity in older people. [source] The role of relationships in understanding telecommuter satisfactionJOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 3 2006Timothy D. Golden Relationships are fundamental to organizational functioning, yet as telecommuting and other forms of virtual work become increasingly popular, research has not yet focused on how the virtual context might alter relationships so as to impact important work outcomes. This study therefore examines the role relationships play in mediating the link between the extent of telecommuting and job satisfaction. In doing so three fundamental types of relationships maintained by employees are investigated,those with managers, coworkers, and family. Regression analysis of field data from 294 telecommuting employees in a large telecommunications company revealed the anticipated inverted U-shaped relationship, mediated by leader-member exchange quality, team-member exchange quality, and work-family conflict. Copyright © 2006 John Wiley & Sons, Ltd. [source] Educational homogamy in Ireland and Britain: trends and patterns*THE BRITISH JOURNAL OF SOCIOLOGY, Issue 4 2003Brendan Halpin ABSTRACT This paper examines the pattern of educational homogamy in Ireland and Britain. Using contemporary data on recent marriages from the early 1970s through to the mid-1990s, we show that these two countries share a broadly similar pattern of educational homogamy, which is quasi-symmetric in character, with no tendency for women to marry up over and above that which can be attributed to the gender difference in educational attainment. In the 1970s, the strength of homogamy was much weaker in Ireland than in Britain. But we discern a clear inter-country difference in how the net strength of homogamy has changed over time. While it has declined in Britain since the 1970s, in Ireland the strength of homogamy has first increased and then levelled off. Our findings are inconsistent with the inverted U-shaped relationship between economic development and homogamy reported by Smits, Ultee and Lammers (1998) , an argument premised on secular change in the criteria of spouse selection. Instead, our results are better understood in terms of Mare's (1991) life course argument that homogamy is inversely related to the time-gap between school departure and first marriage. [source] The Role of Champions in the External Commercialization of Knowledge,THE JOURNAL OF PRODUCT INNOVATION MANAGEMENT, Issue 4 2009Ulrich Lichtenthaler Besides applying knowledge in their own products or services, firms may externally commercialize their knowledge assets (e.g., by means of outlicensing). The literature on champions, however, has focused on internal innovation. This gap in prior research is particularly remarkable as the potential for promoting external knowledge exploitation is high. Some pioneering firms realize great benefits, whereas most others experience major managerial difficulties. This paper tests five hypotheses regarding the emergence and impact of champions of external knowledge exploitation with data from 152 firms across industries. The results of the questionnaire-based study demonstrate the relevance of champions of external knowledge exploitation. Championing constitutes an essential success factor and has strongly contributed to the recent increase in external knowledge commercialization. These findings help to explain the discrepancies between the few successful and the majority of unsuccessful firms. Beyond existing insights, the emergence of champions is affected by external determinants in addition to internal determinants. There is an inverted U-shaped relationship between championing and the internal determinants, that is, organizational climate and active strategy. Moreover, there is a negative relationship between championing and market imperfection and an inverted U-shaped relationship between championing and competitive intensity, which both constitute external determinants of championing. In contrast to the traditional understanding, champions tend to emerge in supportive environments, in which internal and external barriers are relatively low. This surprising finding calls for rethinking the role and motivation of champions. [source] The Impact of Product Innovativeness on the Link between Development Speed and New Product Profitability,THE JOURNAL OF PRODUCT INNOVATION MANAGEMENT, Issue 3 2006Fred Langerak A review of the literature reveals that the relationship between development speed and new product profitability is not as strong and straightforward as conventional wisdom suggests. A number of studies show positive results, others show mixed results, and some present no evidence of a relationship. In other words, the valence of the link between development speed and new product profitability is unclear at this time. Therefore, this study investigates whether or not speeding new products to market has positive or negative effects on new product profitability. Prior research shows that product innovativeness influences both development speed and new product profitability. This raises the question of whether increasing speed is equally successful in improving profitability across new products that differ in their degree of innovativeness. Therefore, this study also investigates the moderating effect of product innovativeness on the relationship between development speed and new product profitability. The results from a survey-based study of 233 manufacturers of industrial products in the Netherlands reveal an inverted U-shaped relationship between development speed and new product profitability. The findings also show that the optimal point is different for two new product types,product improvements and line additions,that vary in their innovativeness. These results provide an onset for the development of a decision tool that helps managers to determine how much to spend on accelerating the development of individual new products and how they should allocate that spending across products in their new product portfolio. [source] The Contingent Value of Responsive and Proactive Market Orientations for New Product Program Performance,THE JOURNAL OF PRODUCT INNOVATION MANAGEMENT, Issue 6 2005Kwaku Atuahene-Gima While the benefits of being market oriented are largely accepted, a group of scholars and managers remain skeptical. Marketing scholars have sought to counter the criticisms leveled against market orientation (MO) by arguing that it has both responsive and proactive dimensions. However, few studies have empirically examined the complexity of the effects of these dimensions on firm performance. Drawing on theories of resource-based advantage and organizational search behavior, this article advances understanding by arguing that responsive and proactive market orientations have curvilinear effects on product development performance, that their interaction may be positively related to product development performance, and that their effects on new product program performance are moderated differentially by the organizational implementation conditions and marketing function power. Survey results of 175 U.S. firms indicate support for most of the hypotheses. Specifically, whereas responsive MO has a U-shaped relationship with new product program performance, proactive MO has an inverted U-shaped relationship with new product program performance. Contrary to the arguments presented here, the interaction of both orientations is negatively related to new product program performance. This study finds that both orientations are needed; however, new product program performance is enhanced when one is at higher level and the other is at lower level. Finally, responsive MO is only positively related to new product program performance under specific conditions such as when strategic consensus among managers is high. On the other hand, the positive effect of proactive MO on new product program performance is further strengthened when learning orientation and marketing power are high. Overall, this study suggests that the effects of responsive and proactive MO on new product program performance are more complex than previously theoretically argued and empirically examined. [source] | ||||||||||