TY - JOUR

T1 - Social Customs and Trade Union Membership

T2 - A Multi-Level Analysis of Workplace Union Density Using Micro-Data

AU - Ibsen, Christian Lyhne

AU - Toubøl, Jonas

AU - Jensen, Daniel Sparwath

PY - 2017/8/1

Y1 - 2017/8/1

N2 - In this article, we investigate the effect of social customs on one of the most important instances of collective action, namely, workers uniting in trade unions. Although many studies have used social custom theory to explain unionization, existing studies have not adequately analysed social customs at the workplace. Using workplace union density as a proxy for social custom, this analysis improves existing studies in a number of ways. First, multi-level analyses of a large panel data set from Denmark reveal that there is a significant positive effect of workplace union density on the probability that new employees join unions. Secondly, using nonparametric regression, we find that the functional form of the relationship between the two variables is accelerating. These results hold for various subsamples. The accelerating functional form indicates that large initial investments in unionization are required to create self-sustaining social customs for union membership. Thirdly, we test the acceleration using segmented regression analysis and find a significant acceleration around 45–65 per cent workplace union density. In the conclusion, we discuss the implications of our study for unionization strategies and for research on unionization.

AB - In this article, we investigate the effect of social customs on one of the most important instances of collective action, namely, workers uniting in trade unions. Although many studies have used social custom theory to explain unionization, existing studies have not adequately analysed social customs at the workplace. Using workplace union density as a proxy for social custom, this analysis improves existing studies in a number of ways. First, multi-level analyses of a large panel data set from Denmark reveal that there is a significant positive effect of workplace union density on the probability that new employees join unions. Secondly, using nonparametric regression, we find that the functional form of the relationship between the two variables is accelerating. These results hold for various subsamples. The accelerating functional form indicates that large initial investments in unionization are required to create self-sustaining social customs for union membership. Thirdly, we test the acceleration using segmented regression analysis and find a significant acceleration around 45–65 per cent workplace union density. In the conclusion, we discuss the implications of our study for unionization strategies and for research on unionization.

U2 - 10.1093/esr/jcx055

DO - 10.1093/esr/jcx055

M3 - Journal article

VL - 33

SP - 504

EP - 517

JO - European Sociological Review

JF - European Sociological Review

SN - 0266-7215

IS - 4

ER -