TY  - RPRT
        AU  - Snell, Andy
AU  - Almeida, Enzo
AU  - Martins, Pedro S.
AU  - Thomas, Jonathan P.
        TI  - Minimum Wages and Worker Retention: The Roles of Labour Concentration and Employment Protection
        PY  - 2026/Sep/
        PB  - Institute of Labor Economics (IZA)
        CY  - Bonn
        T2  - IZA Discussion Paper
        IS  - 18914
        UR  - https://www.iza.org/publications/dp18914
        AB  - How are incumbent workers impacted by minimum wage increases? Is labour market concentration an important moderating factor? We address these questions by presenting a new model, drawing on comprehensive employer-employee matched panel data from Portugal, and considering individual mandated wage rises from both national and collectively bargained minimum wages. We find that employment protection plays a key role in these effects: workers under permanent contracts are almost completely insulated from the exit hazards associated with wage bites while workers in temporary (fixed-term) contracts are exposed to these hazards. Labour concentration can significantly reduce negative effects on temporary workers, by up to 60\%. A model of monopsonistic competition with firing costs rationalises these patterns.
        KW  - minimum wages
KW  - collective bargaining
KW  - temporary contracts
KW  - labour market power
        ER  -