While union density (the share of workers who belong to unions) is not very high in most developed countries, many more workers are covered by collective bargaining agreements, especially in continental EU countries. In France, the difference between coverage of collective bargaining agreements (76%) and union density (22.2%) was 53.8 percentage points in the mid-1970s and increased to 87.2 percentage points in 2016, as collective bargaining coverage increased to 98% and union density fell to 10.8%. Similarly, in Germany in 2018, approximately 17% of employees were union members, while collective bargaining contracts covered more almost 60% of employees. The share of covered employees is lower in the UK and the US, where union density and coverage of collective bargaining agreements largely coincide. In the UK, 78% of workers were covered by collective bargaining contracts in 1970, but that share fell to 26.9% in 2019. And in the US, collective bargaining contracts covered 26.1% of workers in 1977 but just 12.1% in 2020. This article discusses the effects of union power on investment in intangible capital, primarily research and development (R&D). It looks at the theoretical mechanisms at play and reviews the evidence on union effects for country case studies and cross-country studies.
DISCUSSION OF PROS AND CONS
Key theoretical insights
Capital−labor substitution and the hold-up problemUnions may affect investment in tangible (physical) capital and intangible capital (mainly R&D) in different ways. The effects can be analyzed using two theoretical frameworks, which broadly correspond to the different views of unions that have been proposed in the literature. According to the so-called "standard model" [2], unions focus on raising wages, and firms subsequently react by cutting employment. In this framework, there are two possible effects on capital investment: firms may reduce investment in capital in order to reduce costs (scale effect), or they may substitute capital for labor, thus increasing capital investment (substitution effect) [2], [3].