We analyse the question of optimal taxation in a dual economy, when the government is concerned about the distribution of labour income. Income inequality is caused by the presence of sunk capital investments, which creates a good jobs' sector due to the capture of quasi-rents by trade unions....

There still seems to be some confusion about the consequences of normalisations in the optimal taxation literature. We claim that:1) Normalisations do not matter for the real solution of optimal taxation problem.2) Normalisations do matter for good characterisations of the solutions to optimal...

We analyse the question of optimal taxation in a dual economy, when the government is concerned about the distribution of labour income. Income inequality is caused by the presence of sunk capital investments, which creates a .good jobs. sector due to the capture of quasi-rents by trade unions....