pt. 1. There is difference in difference : diversity and heterogeneity -- pt. 2. Difference, behavior and aggregative analysis -- pt. 3. On gender diversity -- pt. 4. An application : gender diversity in the labor market.

We define public administrations (PAs) as productive units, and analyze the recent trends in PAs' productivity applying Sylos Labini's productivity function model. At the microeconomic level, we propose a model of government action for the production of public goods. At the macroeconomic level,...

The brief note introduces the articles collected in the present issue of the journal. It places the various contributions in perspective, critically summarizing the major economic developments since the publication of the last issue