Networks and self-employed migrants

This paper examines the immigrant’s decision to become self-employed. Personal characteristics and attitudes are crucial to this decision, but recent literature also highlights the importance of social networks as providers of information and financial support. To date, empirical research dealing with the network effect has considered self-employed migrants as a homogeneous group. In contrast, our paper examines the impact of the size and the composition of geographic concentration of co-nationals on the propensity to be self-employed among the foreign-born workers taking into account two possible choices: own-account workers and entrepreneurs. Using micro-level data of migrant workers in Spain over the period 2000–2009, the results show that networks affect positively the probability of becoming self-employed. However, they do not affect the likelihood of becoming an entrepreneur, which is determined by individual characteristics such as education and number of years of residence. Thus, our results suggest policies that enable immigrant assimilation can play a significant role in generating entrepreneurial activity.     

Introducing a general class of species diversification models for phylogenetic trees

Phylogenetic trees are types of networks that describe the temporal relationship between individuals, species, or other units that are subject to evolutionary diversification. Many phylogenetic trees are constructed from molecular data that is often only available for extant species, and hence they lack all or some of the branches that did not make it into the present. This feature makes inference on the diversification process challenging. For relatively simple diversification models, analytical or numerical methods to compute the likelihood exist, but these do not work for more realistic models in which the likelihood depends on properties of the missing lineages. In this article, we study a general class of species diversification models, and we provide an expectation-maximization framework in combination with a uniform sampling scheme to perform maximum likelihood estimation of the parameters of the diversification process.     

Promote or Perish? A brief note on academic social networking sites and academic reputation

ABSTRACT

This commentary explores some of the reputational issues of using academic social networking sites (ASNS) such as ResearchGate, ResearcherID, ORCID, Academia.edu, Google Scholar, and Mendeley for academic self-promotion and considers whether the adage of ‘Publish or Perish’ has been recently overshadowed by the new imperative of ‘Promote or Perish’?     

The political impact of tourism dependence in Latin America

This research seeks to test empirically the validity of hypotheses drawn from dependency theory that suggest that economic reliance on tourism creates political dependence. Specifically, it seeks to determine whether the Carribean region, strongly dependent on U.S. tourism, is demonstrably more compliant politically with the United States than other, less dependent, Latin American nations. In addition, the paper examines the relation between political compliance and other indicators of dependence, e.g., investment, aid, and trade. Compliance is measured basically by correlating each nation's voting behavior in the UN General Assembly with that of the United States. A series of tests on a number of relevant economic and political variables yields no confirmation of the dependency argument in the political realm.     

Convergence among EU regions, 1990–2001

This article focuses on convergence in terms of output per working age person across regions in the European Union for the period 1990–2001. Controlling for the quality of national institutions, the authors investigate whether the status of “objective 1” region improves the speed of convergence as compared to what would be expected given the regions' initial conditions. They find evidence of conditional convergence among EU regions, with the quality of national institutions having a positive impact, but no evidence of a correlation between eligibility for objective 1 and faster convergence.     

Small‐sample testing inference in symmetric and log‐symmetric linear regression models

This paper deals with the issue of testing hypotheses in symmetric and log‐symmetric linear regression models in small and moderate‐sized samples. We focus on four tests, namely, the Wald, likelihood ratio, score, and gradient tests. These tests rely on asymptotic results and are unreliable when the sample size is not large enough to guarantee a good agreement between the exact distribution of the test statistic and the corresponding chi‐squared asymptotic distribution. Bartlett and Bartlett‐type corrections typically attenuate the size distortion of the tests. These corrections are available in the literature for the likelihood ratio and score tests in symmetric linear regression models. Here, we derive a Bartlett‐type correction for the gradient test. We show that the corrections are also valid for the log‐symmetric linear regression models. We numerically compare the various tests and bootstrapped tests, through simulations. Our results suggest that the corrected and bootstrapped tests exhibit type I probability error closer to the chosen nominal level with virtually no power loss. The analytically corrected tests as well as the bootstrapped tests, including the Bartlett‐corrected gradient test derived in this paper, perform with the advantage of not requiring computationally intensive calculations. We present a real data application to illustrate the usefulness of the modified tests.     

The intellectual structure of human resource management research: a bibliometric study of the international journal of human resource management, 2000–2012

The purpose of this study is to analyze the existing literature on human resource management (HRM) from all the research papers published in The International Journal of Human Resource Management between 2000 and 2012. The authors apply bibliometric methods to identify the main research lines within this scientific field; in other words, its ‘intellectual structure’. Social network analysis is also used to perform a visualization of this structure. The results of the analysis allow us to define the different research lines or fronts which shape the intellectual structure of research on HRM.     

Entrepreneurial intention among University students in Malaysia: integrating self-determination theory and the theory of planned behavior

The present study endeavors to develop a deeper understanding of the motivational processes involved in intentional entrepreneurial behavior. For this purpose, it integrates the social cognitive approach of the theory of planned behavior (TPB) and the organismic theory of motivation of self-determination theory (SDT). More specifically, it tests the role of basic psychological needs of autonomy, competence and relatedness as defined in SDT in shaping university students’ attitudes and intentions toward entrepreneurship. The sample of this study consisted of 438 (Males?=?166, Females =272) 3rd and 4th year university students from four Malaysian Public Universities. The results of the study show that the model strongly explains about 71% of the variance in entrepreneurial intention. Basic psychological needs of autonomy, competence and relatedness have a strong indirect impact on entrepreneurial intention via their attitudinal antecedents: attitude, subjective norm, and perceived behavioral control. This indicates a full-mediational model, where the attitudinal factors operated as transmitters of effects from the distal constructs of SDT on entrepreneurial intention. These findings confirm that both SDT and the TPB provide complementary explanations of the motivational processes of entrepreneurial behavior. The study contributes to the existing knowledge by providing a theory-based understanding of the role of motivations in the formation of entrepreneurial intentions. It opens the way for future research to analyze how alternative motivations may affect new venture creation, survival and success.