“…The pay scale for new hires (the "B" tier) may be permanently lower than the existing scale (the "A" tier) or the two may gradually converge over time (Cappelli and Sherer, 1990;Essick, 1987). Two-tier wage structures have been established in industries, such as airlines (Walsh, 1988) and retail food (Sichenze, 1988(Sichenze, , 1989Martin, 1990)) The United Food and Commercial Workers' Union (UFCW), the dominant union in the retail-food industry, has more of these agreements than any other union (Sichenze, 1988;Bureau of National Affairs, 1992). Over 90 percent of 89 major collective bargaining agreements (covering 1,000 or more workers) in the retail-food industry contain two-tier or multi-tier wage provisions; the vast majority of wage tiers in these contracts are permanent rather than temporary and multi-tier rather than twotier (Sichenze, 1988(Sichenze, , 1989.…”