Expanding Insights on the Diversity Climate–Performance Link: The Role of Workgroup Discrimination and Group Size

The present study extends knowledge of the performance consequences of workgroup diversity climate. Building upon Kopelman, Brief, and Guzzo's ( 1990 ) climate model of productivity, we introduce workgroup discrimination as a behavioral mediator that explains the positive effects of diversity climate on workgroup performance. In addition, we investigate group size as a moderator upon which this mediated relationship depends. We test these moderated‐mediated propositions using a split‐sample design and data from 248 military workgroups comprising 8,707 respondents. Findings from structural equation modeling reveal that diversity climate is consistently positively related to workgroup performance and that this relationship is mediated by discrimination. Results yield a pattern of moderated mediation, in that the indirect relationship between workgroup diversity climate (through perceptions of workgroup discrimination) and group performance was more pronounced in larger than in smaller workgroups. These results illustrate that discrimination and group size represent key factors in determining how a diversity climate is associated with group performance and, thus, have significant implications for research and practice. © 2014 Wiley Periodicals, Inc.     

Competitive screening in insurance markets with endogenous wealth heterogeneity

We examine equilibria in competitive insurance markets with adverse selection when wealth differences arise endogenously from unobservable savings or labor supply decisions. The endogeneity of wealth implies that high-risk individuals may ceteris paribus exhibit the lower marginal willingness to pay for insurance than low risks, a phenomenon that we refer to as irregular-crossing preferences. In our model, both risk and patience (or productivity) are privately observable. In contrast to the models in the existing literature, where wealth heterogeneity is exogenously assumed, equilibria in our model no longer exhibit a monotone relation between risk and coverage. Individuals who purchase larger coverage are no longer higher risks, a phenomenon frequently observed in empirical studies.     

The determinants of recovery rates in the US corporate bond market

We examine recovery rates of defaulted bonds in the US corporate bond market, based on a complete set of traded prices and volumes. A study of the trading microstructure around various types of default events is provided. We document temporary price pressure with high trading volumes on the default day and the following 30 days, and low trading activity thereafter. Based on this analysis, we determine market-based recovery rates and quantify various liquidity measures. We study the relation between the recovery rates and these measures, considering additionally a comprehensive set of bond characteristics, firm fundamentals, and macroeconomic variables.     

Alliance Concentration in Multinational Companies: Examining Alliance Portfolios,Firm Structure,and Firm Performance

Research summary: This article explores the distribution of alliances across firms' internal structure. Focusing on multinational companies, we examine the impact of alliance portfolio concentration—i.e., the extent to which alliances are concentrated within a limited number of geographic units—on focal firms' performance. Relying on Knowledge‐Based View (KBV) insights, we hypothesize that an increase in alliance portfolio concentration positively influences firm performance and that alliance portfolio size negatively moderates this relationship. Our empirical results enrich the emerging capability perspective on alliance portfolios, point to the relevance of conceptualizing focal firms in alliance portfolio research as polylithic entities instead of monolithic ones, and provide new insights into how firms create value by potentially recombining externally accessed knowledge. Managerial summary: In the setting of multinational companies, we examine whether alliance activities are concentrated in a limited number of subsidiaries or are highly dispersed across multiple subsidiaries. We find that, over time, firms exhibit different patterns in terms of alliance portfolio concentration. In addition, the results show that, for MNCs with a relatively small alliance portfolio, an increase in alliance portfolio concentration is positively related to their financial performance. However, when MNCs' alliance portfolios are relatively large, the relationship between alliance portfolio concentration and firm performance becomes negative. Jointly, these findings suggest that the distribution of alliances across firms' internal structure is an important factor in shaping potential knowledge recombination benefits from alliance portfolios. Copyright © 2017 John Wiley & Sons, Ltd.     

The stability of German export demand equations – have German exports suffered from the strength of the euro?

Since its introduction in 1999, the euro has shown pronounced swings against the US dollar and the British pound. In this study, we investigate whether this evolution has affected bilateral German exports to two of its major export destinations: the US and the UK. Applying the autoregressive distributed lags bounds testing approach, we find different elasticities of trade between the two export destinations. Our results show that the export demand equation for the US seems to be more stable than that for the UK. Furthermore, it seems that the short-run dynamics in particular have changed.     

Contributing to markets for technology? A comparison of patent filing motives of individual inventors,small companies and universities

We compare patenting motives of individual inventors, small firms, and universities to those of large firms. We use data from a survey (641 responses) among applicants at the European Patent Office. Our results from regression and factor analyses confirm significant differences among applicant types. The generation of licensing opportunities is rated as being more important if the applicant is a university, individual inventor or small firm. Blocking and prevention of imitation is rated as being less important if the applicant is a university. We interpret that this finding results from the universities' willingness to license under adequate conditions and their tendency not to use their patents for preventing the diffusion of their technology and its usage by others. Individual inventors and small firms place a higher importance on using patents as signals to investors, suggesting that patents are perceived as useful to secure access to the capital necessary to start or grow a business. Among all applicant groups, individual inventors attribute the most importance to blocking as a patent filing motive. This gives cause for concern because individuals who do not manufacture products on their own but, rather, use their patents to block others from production act as patent trolls.     

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Learning to manage: development experiences of hospital frontline managers

In high performing human resource management (HRM) systems, much responsibility for managing employees and associated processes is typically devolved to frontline managers (FLMs). Research indicates that undeveloped FLM HRM ability can impact performance, particularly in health‐care organisations. We present the incidence and characteristics of HRM‐oriented learning and development programs for FLMs in hospitals with high performing systems of HRM, and experiences of FLMs directly participating in them. We combine data from 50 Australian hospital accreditation reports with interviews from eight ‘high performance HRM’ cases. We find: almost all high performers develop FLM HRM ability; development programs are extremely diverse between hospitals and succession planning is deficient. While primarily focused on understanding ability, the study contributes to the ability, motivation, opportunity framework, proposing a model and new interrelationships between these variables in the FLM context.     

Spare the Young Fish: Optimal Harvesting Policies for North-East Arctic Cod

The North-East Arctic cod (Gadus morhua) fishery, as most other commercial fisheries, is wasting the larger part of its potential. Examining a detailed multi-cohort, multi-gear bioeconomic model, we show that the cause is rather a too small mesh size than excessive effort. Although internationally and nationally managed by quota allocations and regulations, the current exploitation pattern implies that essentially the wrong fish are targeted. Catching older and heavier fish could double the fishery’s Net-Present-Value. This increases harvested biomass while it reduces the number of fish removed from the ocean, highlighting the importance of age- and gear-specific modeling. Moreover, optimal harvesting policies would also lead to a much more robust and abundant cod stock.     

Local volatility under rough volatility

Several asymptotic results for the implied volatility generated by a rough volatility model have been obtained in recent years (notably in the small-maturity regime), providing a better understanding of the shapes of the volatility surface induced by rough volatility models, supporting their calibration power to SP500 option data. Rough volatility models also generate a local volatility surface, via the so-called Markovian projection of the stochastic volatility. We complement the existing results on implied volatility by studying the asymptotic behavior of the local volatility surface generated by a class of rough stochastic volatility models, encompassing the rough Bergomi model. Notably, we observe that the celebrated “1/2 skew rule” linking the short-term at-the-money skew of the implied volatility to the short-term at-the-money skew of the local volatility, a consequence of the celebrated “harmonic mean formula” of [Berestycki et al. (2002). Quantitative Finance, 2, 61–69], is replaced by a new rule: the ratio of the at-the-money implied and local volatility skews tends to the constant $1/(H+3/2)$ (as opposed to the constant 1/2), where H is the regularity index of the underlying instantaneous volatility process.