In this short paper, published in the American Economic Review, Atkin, Chaudhry, Chaudry, Khandelwal and Verhoogen (2015) directly asked firms about their mark-ups.
Analysts of the South African labour market have mainly used household surveys to analyse the labour market. It has been more difficult to explore the labour demand of firms, as a result of limited data availability.
Firms' informality is pervasive in Bangladesh. In this paper published in Economics Letters, De Giorgi and Rahman (2013) implemented an information campaign on registration and find that the treatment made firms more aware, but had no impact on registration.