Notes:

Reprinted in Piero Tedeschi (ed) Economic Models of Trade Unions (London: Chapman and Hall, 1992). Also reprinted in The Economics of Labor Unions (ed Alison Booth) in the series The International Library of Critical Writing in Economics (Mark Blaug, series editor) (UK: Edward Elgar 2001); and in Jacqueline Scott and Yu Xie (eds) Quantitative Social Science, part of the SAGE Benchmarks in Social Research Methods series (Sage, 2005).