Analytic posteriors for Pearson's correlation coefficient

Pearson's correlation is one of the most common measures of linear dependence. Recently, Bernardo (11th International Workshop on Objective Bayes Methodology, 2015) introduced a flexible class of priors to study this measure in a Bayesian setting. For this large class of priors, we show that the (marginal) posterior for Pearson's correlation coefficient and all of the posterior moments are analytic. Our results are available in the open‐source software package JASP.     

Contract ineffectiveness in emerging markets: An institutional theory perspective

The effectiveness of contracts is bounded by the institutional environment in which they are designed and enforced. When firms form supply chain partnerships in emerging markets, they may experience contract ineffectiveness, which is defined as a firm's perceived limits of contracts with respect to safeguarding interests and coordinating activities. Specifically, we identify two institutional factors that may give rise to contract ineffectiveness, information transparency and legal enforceability, as they determine how effectively a firm designs and enforces a contract. In addition, we reveal that contract ineffectiveness prompts a firm to seek social ties, including business ties and political ties, to overcome the institutionally induced limits of contracts. These efforts, however, are moderated by the type of predominant pressure a firm bears. While equity pressure strengthens the relationship between contract ineffectiveness and a firm's pursuit of social ties, efficiency pressure weakens this relationship, because seeking social ties imposes an extra burden of efficiency. Tested by data collected from 187 distributors in China, our study reveals the institutional causes and the consequences of contract ineffectiveness, which is a common problem encountered by firms when forming supply chain partnerships in emerging markets.     

From Hot Cakes to Cold Feet: A Contingent Perspective on the Relationship between Market Uncertainty and Status Homophily in the Formation of Alliances

In this study, we reconsider the classical positive association between the level of market uncertainty and an organization's propensity to form ties with organizations of similar status. Although prior research argues that the greater the uncertainty, the higher the level of status homophily, we suggest that this relationship is contingent upon framing that affects positive or negative valence towards uncertainty. In an up market, organizations tend to frame uncertainty as upside risk, and thus will subsequently favour explorative uncertainty‐mitigation devices; whereas, in a down market, organizations primarily frame uncertainty as downward risk, and thus will rely on more conservative uncertainty‐mitigation mechanisms. We therefore predict that a greater number of status‐heterophilous ties will be formed in an up market than in a down market. We discuss the implications of our results for status theory and more broadly for research on strategic decision making under uncertainty.     

Transnational ties and performance of immigrant entrepreneurs: the role of home-country conditions

This study contributes to the recent empirical literature on the performance of transnational immigrants' firms by investigating the effect of transnational ties on the firm's growth. In addition to the effect of the ties, the paper shows that home country's institutional and socio-economic characteristics and country-specific entrepreneurial factors have a crucial role in shaping the ties–performance relationship. The evidence from a sample of immigrant-owned firms in the Italian information and communications technology (ICT) sector in the period 2000–2010 confirmed the relevance of the proposed model and helped in understanding a potential channel of improvements in immigrant firms' performance through transnational ties. Our results show the limited relevance of a direct, or linear, impact of ties on the growth of sales in immigrant-run firms in the ICT sector, but support the crucial moderating role of home-country characteristics on the ties–performance relationship.     

De ontwikkeling van de inkomensongelijkheid gemeten volgens informatietheoretische maatstaven

Summary Some years ago Theil introduced new inequality measures, originating from information theory. He applied them 8.0. to income distributions in the United States. This inequality coefficient is - in contrast to Pareto's constant - based on the whole income distribution. Moreover, the inequality can be disaggregated into inequalities for groups of population. The numerical value of the inequality depends on the chosen class intervals; this may be inconvenient when making comparisons between countries, between different periods and the like. Hence we suggest an appropriate standardizing procedure. The inequality of income distributions has been calculated for the period 1950–1964 and a cornparison is made with Pmm's constant. The investigation relates to three groups of population: wage earners, self employed and others. A remark is made about between-province inequalities.     

Core self-evaluations and salary attainment: the moderating role of the developmental network

Core self-evaluation (CSE) has been shown to be robust as a predictor of employees' salary attainment. Although the developmental network is suggested to have a positive impact on salary, do all high-CSE individuals benefit from their developmental networks similarly? We incorporate both personality research and developmental network research to explore this question in two studies. In Study 1, we investigated whether developmental network size moderates the positive CSE–salary relationship. In Study 2, we explored whether the organizational status and the strength of ties of one's developers moderate the positive CSE–salary relationship. Results indicated that high-CSE individuals with developmental networks characterized by fewer developers and by strong ties reported higher salaries than others. Overall, our findings demonstrate that the positive CSE–salary link may vary depending on the structural characteristics of the developmental network.     

Performance Implications of Ties to the Government and SOEs: A Political Embeddedness Perspective

In many countries governments not only regulate business activities, but also become involved in the corporate governance of individual firms through ownership and board ties. While existing studies usually focus either on benefits of political connections or on costs of government influence, a political embeddedness perspective helps us consider both advantages and constraints associated with ties to the government. In particular, firms with direct ties to the government will experience significant costs associated with government officials' involvement in the corporate governance process. In contrast, firms with ties to state‐owned enterprises (SOEs) are connected to the government indirectly and thus, while getting access to state‐owned resources, avoid costs associated with the government's interventions. This study compares the performance consequences of board and ownership ties to the government with the consequences of board and ownership ties to SOEs. I find that ties to SOEs are associated with higher profitability, while no significant differences are discovered for firms with direct ties to the government.     

Ties that blind? How strong ties affect small business owner-managers’ perceived trustworthiness of their advisors

This research investigates how a strong personal relationship (strong tie) between a small business owner-manager and his professional or informal advisor affects the relationship between the advisor's recent performance and the owner-manager's perceptions of the advisor's trustworthiness in terms of ability, benevolence and integrity. A negative moderating effect could point to a ‘tie that blinds’: the owner-manager may be less critical in evaluating the advisor's perceived trustworthiness in light of their recent performance, because of the existing personal relationship. A conceptual model is constructed and examined with survey data comprising 153 young Finnish businesses. The results show that strong ties increase the owner-manager's perception of the advisor's integrity, disregarding their recent performance. For professional advisors, strong ties reduce the impact of recent performance in the owner-manager's evaluation of their ability. For informal advisors, a strong tie makes it more likely that their benevolence will be evaluated highly in light of their recent performance. While the results show that ‘ties can blind’ under certain circumstances, the limitations of the study raise the need for further research to specify these contextual factors and examine the causal link between the choice of advisor and business performance.     

OCB and external–internal social networks: effects on individual performance and adaptation to change

In this study, we develop and test a model that links one's internal and external social network structures to his or her willingness and ability to adapt in a changing work context. Using a survey data from 371 employees working in 133 different branches of a large financial firm, we find that individual behaviors that explain task performance and individual adaptation to change are affected by a number of supportive social ties (size of the support network) with which one receives support inside and, mostly, outside the workplace. The results also show that individual performance and adaptation to change are affected by the level of workers' organizational citizenship behavior. We also identify a mediating effect exerted by the informational network structure (mostly an internal network) on the relationship between the support network (mostly an external network) and individual task performance.     

From Public Familiarity to Comfort Zone: The Relevance of Absent Ties for Belonging in Berlin's Mixed Neighbourhoods

Segregation along lines of race/ethnicity and class has created multi‐ethnic and rather class‐homogeneous neighbourhoods in various European cities, commonly labelled as ‘disadvantaged’. Such neighbourhoods are often seen as ‘lacking’ community, as local networks are crucial for belonging and mixed neighbourhoods are too diverse to provide homogeneous identifications. However, in contrast to the understandings of the sociology of community, people might still experience ‘belonging’, yet in different ways. This article argues that we have to focus on the under‐researched ‘time in‐between’ (Byrne, 1978), the absent ties that Granovetter (1973) pointed to, to understand belonging, while moving away from a conception of the anonymous city and from the urban village. This article explores how absent ties affect belonging by empirically sustaining the notion of public familiarity: both recognizing and being recognized in local spaces. Using regression models on survey data from two mixed neighbourhoods in Berlin, Germany, we analyse the importance of neighbourhood use for public familiarity as well as how it relates to residents' comfort zone: people's feeling of belonging and their sense that others would intervene on their behalf. Our findings indicate that research on neighbourhoods could benefit greatly from a careful consideration of the ‘time in‐between’.     

Chinese managers' career success networks: the impact of key tie characteristics on structure and interaction practices

Structured personal interviews were conducted with 105 senior and mid-level Chinese male and female managers, in which each respondent provided information about their career success network (CSN) ties. Using this data, we tested hypotheses on: (1) the age composition of Chinese managers' CSNs; (2) the face-to-face interaction practices within Chinese managers' CSNs; and (3) the roles of tie sex composition and tie content (position-centred versus person-centred ties) in influencing the age composition of and interaction practices within Chinese managers' CSNs. The results demonstrated that both Chinese male and female managers, while generally preferring to form CSN ties with individuals who are older than themselves, are relatively more reluctant to include middle-aged or elder women in their CSN. The age of those included in the respondents' CSN was also influenced by tie content and whether the tie spans the organizational boundary. With respect to interaction practices within the CSN, tie content moderated the relationship between tie sex composition and interaction practice. Female managers' person-centred ties with men had significantly lower levels of interaction outside the workplace than person-centred ties composed of members of the same-sex. However, this difference was not exhibited in the case of position-centred ties. Interestingly, the reluctance to socialize with the opposite-sex exhibited by female managers did not appear to be shared by their male counterparts. The implications of these results for career success in China are discussed.     

Rank-based Tests for Cross-sectional Dependence in Large (N,T) Fixed Effects Panel Data Models

Most existing methods for testing cross-sectional dependence in fixed effects panel data models are actually conducting tests for cross-sectional uncorrelation, which are not robust to departures of normality of the error distributions as well as nonlinear cross-sectional dependence. To this end, we construct two rank-based tests for (static and dynamic) fixed effects panel data models, based on two very popular rank correlations, that is, Kendall's tau and Bergsma–Dassios’ τ*, respectively, and derive their asymptotic distributions under the null hypothesis. Monte Carlo simulations demonstrate applicability of these rank-based tests in large (N,T) case, and also the robustness to departures of normality of the error distributions and nonlinear cross-sectional dependence.     

A theory of supplier network-based innovation value

To understand how a supplier helps a buying company create value through innovations, studies have focused on a supplier's internal resources or its relationship with a buying company. Building upon this body of literature, we develop a theory of supplier network-based innovation value in this conceptual paper. This theory explains how a supplier's upstream and downstream value network can be a source of competitive advantage for a buying company. Specifically, it proposes that the levels and types of supplier innovation value is contingent on the configuration of a dual-ego value network, characterized by the locus and degree of buyer-supplier structural equivalence. This theory also explains how a supplier's ties with a buying firm's competitors can pose both opportunity and risk to buying company innovation. This theory contributes to the literature by showing when “seemingly undesirable” suppliers, due to a lack of technical capability or strong relationship with a buying company, might still be valuable to a buying company's innovation.     

Forms of cross‐border mobility and social capital in multinational enterprises

This paper discusses how different forms of cross‐border employee mobility all contribute to establishing social ties across different units of multinational enterprises (MNEs). Despite the growing recognition of the significance of employees' cross‐unit social ties in MNEs for both individuals and the organisation, the mechanisms for creating such ties remain underspecified. We contribute to closing this gap by identifying the role that an array of forms of international mobility can play in promoting employees' (cross‐unit) social ties inside MNEs. We draw upon empirical accounts of the job‐related international mobility experiences of 72 high‐skilled employees in three leading MNEs in the mobile telecommunications sector. Guided by a framework that utilizes some of the key concepts of the debate on social ties and social capital, we discuss traditional expatriation, short‐term assignments, localised transfers and business travel in terms of the structure and strength of the cross‐unit ties they engender, as well as their accessibility. We find (1) that it is not only traditional long‐term assignments in the form of expatriation that enable individuals to create cross‐unit social ties; and, (2) that different forms of international mobility promote cross‐unit social ties in variable ways and to different extents.     

The influence of supply network structure on firm innovation

In this study, we examine the structural characteristics of supply networks and investigate the relationship between a firm's supply network accessibility and interconnectedness and its innovation output. We also examine potential moderating effects of absorptive capacity and supply network partner innovativeness on innovation output. We hypothesize that firms will experience greater innovation output from (1) higher levels of supply network accessibility and supply network interconnectedness, (2) the interaction between the levels of these two structural characteristics, (3) the moderating role of absorptive capacity on supply network accessibility and the moderating role of supply network partner innovativeness on supply network interconnectedness. Supply network partner relationships are drawn in the context of the electronics industry using data from multiple sources. We use social network analysis to create measures for each supply network structural characteristic. Using regression techniques to test the relationship between these structural characteristics and firm innovation for a sample of 390 firms, our findings suggest that supply network accessibility has a significant association with a firm's innovation output. The results also indicate that interconnected supply networks strengthen the association between supply network accessibility and innovation output. Moreover, the influence of the two structural characteristics on innovation output can be enhanced by a firm's absorptive capacity and level of supply network partner innovativeness. By addressing the need for deeper structural analysis, this study contributes to supply chain research by accounting for the embedded nature of ties in supply networks, and showing how these structural characteristics influence the knowledge and information flows residing within a firm's supply network.     

Nonparametric inference on multivariate versions of Blomqvist’s beta and related measures of tail dependence

We consider nonparametric estimation of multivariate versions of Blomqvist’s beta, also known as the medial correlation coefficient. For a two-dimensional population, the sample version of Blomqvist’s beta describes the proportion of data which fall into the first or third quadrant of a two-way contingency table with cutting points being the sample medians. Asymptotic normality and strong consistency of the estimators are established by means of the empirical copula process, imposing weak conditions on the copula. Though the asymptotic variance takes a complicated form, we are able to derive explicit formulas for large families of copulas. For the copulas of elliptically contoured distributions we obtain a variance stabilizing transformation which is similar to Fisher’s z-transformation. This allows for an explicit construction of asymptotic confidence bands used for hypothesis testing and eases the analysis of asymptotic efficiency. The computational complexity of estimating Blomqvist’s beta corresponds to the sample size n, which is lower than the complexity of most competing dependence measures.      

Are relational ties always good for knowledge acquisition? Buyer–supplier exchanges in China

Relational ties between manufacturers and their suppliers serve as an important strategic resource for value creation and realization. However, conflicting evidence exists regarding their role in the acquisition of specific knowledge. This study proposes that relational ties have a nonlinear effect on specific knowledge acquisition and that this nonlinear relationship is conditional on contract specificity and competitive intensity. Results from a sample of 385 manufacturer–supplier exchanges in China demonstrate that a buyer's relational ties with its major supplier have an inverted U-shaped effect on specific knowledge acquisition from this supplier; this inverted U-shaped relationship is stronger (steeper) when contract specificity is high and competition is more intense. These findings suggest that managers should understand the benefits and downsides of relational ties in acquiring specific knowledge and avoid building highly embedded ties when they draft detailed contracts or competition is highly intensive.     

Risk-taking and relational perspective on turnover intentions

This study investigated risking-taking and network ties and their impact on an individual's intention to quit from a relational perspective. Using the social identity and social capital as the theoretical foundation, hypotheses were developed to examine how internal instrumental and external ties as well as ties with higher ranked individuals and their association with turnover intention. These hypotheses were empirically tested using data collected from 126 full-time employees in a Chinese setting. The results showed that high risk propensity was positively associated with turnover intention. Not only internal ties that binds, but external networking also matter in turnover decisions.     

我国原油、煤炭和天然气的价格波动关系的研究——基于DCC-MVGARCH模型的实证分析

本文以原油、煤、天然气的价格收益率作为研究对象,运用DCC-MVGARCH模型,得出能源价格波动的动态相关系数,通过实证分析发现能源价格波动性的关系。结果表明,原油市场和煤炭市场波动性的动态相关系数随时间发展不断增长,原油市场和天然气市场波动性的相关系数比较稳定,煤炭市场和天然气市场波动性也比较稳定。