Search results for "Longitudinal data"

Flexible modelling of serial correlation in GLMM

2008

R&D subsidies & external collaborative breadth: Differential gains and the role of collaboration experience

2018

The file attached to this record is the author's final peer reviewed version. External collaboration breadth is important for firms to acquire the knowledge needed to innovate. In this paper, we combine cross-sectional and longitudinal data from the Spanish Panel of Technological Innovation Survey (PITEC) to examine the indirect impact of R&D subsidies on firm external collaboration breadth. We contribute to understanding of the indirect impacts of R&D subsidies by first providing strong evidence of an economically significant average positive impact of R&D subsidies on firm external collaboration breadth. Second, our results advance understanding of the differential impacts of R&D subsidie…

Job insecurity and sickness absence: Correlations between attrition and absence in 36 occupational groups

2012

Aims: To investigate how job insecurity, as indicated by attrition rates out of employment, affects sickness absence among remaining workers. Methods: A longitudinal analysis investigated how the percentage of workers absent due to sickness was affected by attrition out of employment in Norwegian Labour Force Surveys from 1997 to 2005, between 31 quarterly observations at the level of 36 occupational groups. Results: Rising attrition is associated with more sickness absence. Conclusions: Previous research has argued that job insecurity can lead to more absence because of a stressor effect as well as to less absence because of a disciplinary effect. This research indicates that the stressor…

Elites, communities and the limited benefits of mentorship in electronic music

2020

AbstractWhile the emergence of success in creative professions, such as music, has been studied extensively, the link between individual success and collaboration is not yet fully uncovered. Here we aim to fill this gap by analyzing longitudinal data on the co-releasing and mentoring patterns of popular electronic music artists appearing in the annual Top 100 ranking of DJ Magazine. We find that while this ranking list of popularity publishes 100 names, only the top 20 is stable over time, showcasing a lock-in effect on the electronic music elite. Based on the temporal co-release network of top musicians, we extract a diverse community structure characterizing the electronic music industry.…

Panel Data Analysis via Mechanistic Models

2018

Panel data, also known as longitudinal data, consist of a collection of time series. Each time series, which could itself be multivariate, comprises a sequence of measurements taken on a distinct unit. Mechanistic modeling involves writing down scientifically motivated equations describing the collection of dynamic systems giving rise to the observations on each unit. A defining characteristic of panel systems is that the dynamic interaction between units should be negligible. Panel models therefore consist of a collection of independent stochastic processes, generally linked through shared parameters while also having unit-specific parameters. To give the scientist flexibility in model spe…

Convergence analysis for hierarchical longitudinal data

2018

Abstract Convergence analysis is typically envisaged either from a macro or a micro perspective. However, empirical tests tend to ignore that the two levels are often “nested” in a hierarchy. Building on hierarchical growth curve modelling, we propose an approach to convergence analysis that allows contemporaneous inference on macro and micro-convergence. Compared to the classic linear convergence analysis, the suggested methodology provides a more flexible alternative to model heterogeneity and validate the results for possible Galton's fallacy. We illustrate the approach in two empirical examples, one considering convergence across European regions and countries and the other across Itali…

Self-reported hearing is associated with time spent out-of-home and withdrawal from leisure activities in older community-dwelling adults.

2015

Background Hearing difficulties are prevalent among older people and can lead to difficulties in social interaction. These difficulties may increase the tendency to remain at home and withdraw from leisure activities. Aims To investigate whether self-reported hearing problems are associated with time spent out-of-home and withdrawal from a leisure activity among older persons. Methods Cross-sectional and longitudinal data on 75- to 90-year-old community-dwelling men and women (n = 767) was used. Self-reports of hearing, diseases, and difficulty walking 2 km were obtained via home interviews at baseline, and withdrawal from a leisure activity via 1- and 2-year follow-up telephone interviews.…

Neighborhood environment, social participation, and physical activity in older adults with lower limb osteoarthritis: A mediation analysis

2021

Older adults with lower limb osteoarthritis (LLOA) are highly dependent on their physical and social environment for being physically active. Longitudinal data from 2286 older adults (M age = 73.8 years; 50.3% female) in six European countries were analyzed using cross-lagged Structural Equation Modeling (SEM) and multi-group SEM. In cross-sectional analyses, neighborhood resources were associated with physical activity (r = 0.26;p <.001) and social participation (r = 0.13;p =.003). Physical activity at follow-up was associated with neighborhood resources, with this relationship mediated by social participation in people with LLOA (β = 0.018;p =.013). To promote future physical activity,…

Marital transitions and life satisfaction

2014

This article is based on three waves of data collected by the Nord-Trøndelag Health Study (HUNT), Norway. It investigates changes in life satisfaction associated with transition both into and out of marital unions (marriages and cohabitations). It provides longitudinal data on life satisfaction for a larger sample ( N=57,446), a longer age span (19–101 years) and over a longer observation period (22 years) than previously published research on this topic. The large sample permits interaction analyses focusing on small gender/age categories. Results indicate that marriage and cohabitation does enhance life satisfaction, but more for some groups than for others. Cohabitation enhances life sat…

US-Based Fast Food Restaurants: Factors Influencing International Expansion of Franchise Systems

2010

Studies of international franchising are scant, but growing, and can be divided into two main streams of research: those focused on environmental predictors of internationalization and those focused on strategic, firm level characteristics. Belonging to the latter category, this study empirically examines a set of firm level attributes as predictors of the decision-making on whether or not firms seek international expansion. Using longitudinal data from Bonds’ Franchise Guide 2001-2008, we draw upon a sample of U.S. based fast food franchise systems for testing our hypotheses. Specifically, our database is comprised of 1058 observations for 158 chains and we estimate a semi-parametric logis…