1. Addison JT, Belfield C (2000) The impact of financial participation and employee involvement on financial performance: a re-estimation using the 1998 WERS. Scot J Pol Econ 47(5):571–583
2. Addison JT, Hirsch BT (1989) Union effects on productivity, profits and growth: has the long run arrived? J Lab Econ 7:72–105
3. Batt R, Welbourne T (2002) Performance growth in entrepreneurial firms: revisiting the union-performance relationship. In: Katz J, Welbourne T (eds) Research Volume in Entrepreneurship, vol 5. JAI Press
4. Bennett JT, Kaufman BE (eds) (2007) What do unions do? A 20-year perspective. Transaction Publisher, New Brunswick
5. Blanchflower DG, Bryson A (2009) Trade union and the economics of the workplace. In: Brown W, Bryson A, Forth J, Whitfield K (eds) The evolution of the modern workplace. Cambridge University Press, Cambridge, pp 48–73