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...

Recently, the number of state interventions and of firm subsidies has largely increased. However, the possible outcome of such interventions is rather am-biguous. This paper investigates the impact of firm subsidies granted by Ger-man regional policy. The long experiences made with regional...

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 differences estimates as well as with estimates obtained using...