Minimum wages and worker retention: the roles of labour concentration and employment protection
Andy Snell,
Enzo Almeida,
Pedro Martins and
Jonathan P. Thomas
Nova SBE Working Paper Series from Universidade Nova de Lisboa, Nova School of Business and Economics
Abstract:
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.
Keywords: Minimum wages; Collective bargaining; Temporary contracts; Labour market power (search for similar items in EconPapers)
JEL-codes: J23 J38 J42 J63 (search for similar items in EconPapers)
Pages: 49 pages
Date: 2026
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Working Paper: Minimum Wages and Worker Retention: The Roles of Labour Concentration and Employment Protection (2026) 
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Persistent link: https://EconPapers.repec.org/RePEc:unl:unlfep:wp689
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