In this paper, we investigate the use of interactive effect or linear factor models in regional policy evaluation. We contrast treatment effect estimates obtained by Bai (2009)'s least squares method with the popular difference in difference estimates as well as with estimates obtained using...

Competitiveness differentials are blamed for the instability of the Eurozone. Most of the analyses focus on labour costs or labour-market institutions. This paper explores an additional source of differentials in competitiveness: land and building prices. European countries, especially France,...