@article{JankinDeNeveDawesetal., author = {Jankin, Slava and De Neve, Jan-Emmanuel and Dawes, Christopher T. and Christakis, Nicholas A. and Fowler, James H.}, title = {Born to Lead? A Twin Design and Genetic Association Study of Leadership Role Occupancy}, series = {The Leadership Quarterly}, volume = {24}, journal = {The Leadership Quarterly}, number = {1}, doi = {10.1016/j.leaqua.2012.08.001}, pages = {45 -- 60}, abstract = {We address leadership emergence and the possibility that there is a partially innate predisposition to occupy a leadership role. Employing twin design methods on data from the National Longitudinal Study of Adolescent Health, we estimate the heritability of leadership role occupancy at 24\%. Twin studies do not point to specific genes or neurological processes that might be involved. We therefore also conduct association analysis on the available genetic markers. The results show that leadership role occupancy is associated with rs4950, a single nucleotide polymorphism (SNP) residing on a neuronal acetylcholine receptor gene (CHRNB3). We replicate this family-based genetic association result on an independent sample in the Framingham Heart Study. This is the first study to identify a specific genotype associated with the tendency to occupy a leadership position. The results suggest that what determines whether an individual occupies a leadership position is the complex product of genetic and environmental influences, with a particular role for rs4950.}, language = {en} } @article{BaturoJankin, author = {Baturo, Alexander and Jankin, Slava}, title = {Life of Brian Revisited: Assessing Informational and Non-Informational Leadership Tools}, series = {Political Science Research and Methods}, volume = {1}, journal = {Political Science Research and Methods}, number = {1}, doi = {10.1017/psrm.2013.3}, pages = {139 -- 157}, abstract = {Recent literature models leadership as a process of communication in which leaders' rhetorical signals facilitate followers' co-ordination. While some studies have explored the effects of leadership in experimental settings, there remains a lack of empirical research on the effectiveness of informational tools in real political environments. Using quantitative text analysis of federal and sub-national legislative addresses in Russia, this article empirically demonstrates that followers react to informational signals from leaders. It further theorizes that leaders use a combination of informational and non-informational tools to solve the co-ordination problem. The findings show that a mixture of informational and non- informational tools shapes followers' strategic calculi. Ignoring non-informational tools — and particularly the interrelationship between informational and non-informational tools - can threaten the internal validity of causal inference in the analysis of leadership effects on co-ordination.}, language = {en} }