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How does a typically European bargaining system, with collective bargaining and national minimum wage, coexist with low unemployment and high wage flexibility? A unique data set on workers, firms, and collective bargaining contracts in Portugal is used to analyze the determinants of both the contractual wage and the wage cushion (difference between contractual and actual wages). The results indicate that the wage cushion stretches the returns to worker and firm attributes, whereas it shrinks the returns to union power. Therefore, firm-specific arrangements partly offset collective bargaining, granting firms certain freedom when setting wages. Contractual wages reflect trade unions' egalitarian policy.