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2. A. Ulph and D. Ulph (1990) ‘Union Bargaining: A Survey of Recent Work’, in D. Sapsford and Z. Tzannatos (eds), Current Issues in Labour Economics (London: Macmillan Press).
3. A. Booth (1995) The Economics of the Trade Union (Cambridge: Cambridge University Press).
4. D. Sapsford and Z. Tzannatos (1993) The Economics of the Labour Market (London: Macmillan Press).
5. T. Aidt and Z. Tzannatos (2002) Unions and Collective Bargaining: Economic Effects in a Global Environment (Washington, DC: World Bank).