1[2]R. A. Noe, J. R. Hollenbech, B. Gerhart :" Human resource management gaining a competitive advantage", Third edition. New York: McGraw-Hill, 2000, p42-47.
2[3]R. Reed and R. J. Defillippi :" Causal Ambiguity, barriers to imitation, and Sustainable Competitive advantage", Academy of Management Review, vol15 (1) ,p88- 102.
3[4]R. Reed and R. J. Defillippi:"Causal Ambiguity, barriers to imitation, and Sustainable Competitive advantage", Academy of Management Review, vol15(1),p88 102.
4[5]C. R. Mcconnell and S. L. Brue: "Economics: Principles,Problems, and policies", the 12th edition. New York: McGraw-Hill, 1993.
5[6]J. Pfeffer:" Competitive advantage through people ",Boston: Harvard Business School Press, 1994.
6[8]H. A. Thompson : "Supporting sears' turnaround with compensation", ACA Journal, 1997,p8- 12.
7[9]L. R. Gomez-Mejia:"Structure and process of diversification ", compensation strategy, and firm performance,Strategic management journal, Oct. 1992.
10Marcia P. Miceli , Robert L. Heneman (2000).Contextual determinants of variable pay plan design: a proposed research framework. [J] Human resource management review, Vol. 10,289-304
