Union membership in U.S. displayed a ∩-shaped pattern over the 20th century, while in- come inequality sketched a ∪. A model of unions is developed to analyze this phenomenon. There is a distribution of productivity across firms in the economy. Firms hire capital, plus skilled and unskilled...

Subcontracting — the practice of using intermediaries to contract workers, whether through temp agencies, manpower agencies, franchise, or other multilayered contracting — is an increasingly popular pattern of employment worldwide. Whether justified from a business perspective or not,...

This article analyzes how Nordic trade unions cooperate with unions in Europe, and what actors and organizations they cooperate with to influence EU policies. We examine both similarities and differences between the Nordic countries and between unions in different sectors, and make some...

This article investigates the transformations of the French unionism and of the French system of industrial relations over the last years and their probable future. It shows: an evolution from a militant unionism to a professionalized trade unionist system; the decline of collective actions; the...

Union membership in the United States displayed a ∩-shaped pattern over the 20th century, while income inequality sketched a ∪. A model of unions is developed to analyze these facts. There is a distribution of productivity across firms in the economy. Firms hire capital, plus skilled and...

Income inequality has been lower in periods when trade unionism has been strong. Using observations on wages by occupation, by geography, and by gender in collective bargaining contracts from the 1940s to the 1970s, patterns in movements of wage differentials are revealed. As wages increased,...

Income inequality has been lower in periods when trade unionism has been strong. Using observations on wages by occupation, by geography, and by gender in collective bargaining contracts from the 1940s to the 1970s, patterns in movements of wage differentials are revealed. As wages increased,...

This paper applies principles from evolutionary biology to the study of unions. We show that unions which maximize the present discounted wages of current members will be displaced in evolutionary competition by unions with more moderate wage policies that allow their firms to live longer. This...