The recently article published in several media titled “Why women should pay less taxes” has been widely commented on social media. Author argues that the lower elasticity of the labor supply of married women would imply an improvement in overall efficiency if they had less labor taxes. However, nobody seems to talk about the economics behind the argument for this measure and they stop at the headline. Given its slightly technical nature, I am going to explain what is the theory and empirical data that support (or not) such argument.