Moreno, DiegoPetrakis, EmmanuelUniversidad Carlos III de Madrid. Departamento de Estadística2022-07-222022-07-222022-07-222340-5031https://hdl.handle.net/10016/35529In an economy in which firms exercise market power in the markets for consumption goods and inputs (labor), we show that a merger to monopoly is Pareto improving when the number of firms is below a threshold. This threshold is larger the larger is the elasticity of labor supply and the smaller is the consumers'preference for goods variety. Consequently, market concentration may have non-monotonic general equilibrium effects on wage mark downs, employment and welfare.engAtribución-NoComercial-SinDerivadas 3.0 EspañaGeneral EquilibriumMarket PowerMarket EfficiencyMergersworking paperD4D5D6L1L4EconomíaDT/0000002016