1. Targeted agricultural export subsidies ad social welfare;P C Abbott;American Journal of Agricultural Economics,1987
2. When to control for covariates? Panel-asymptotic results for estimates of treatment effects;D A Angrist;The Review of Economics and Statistics,2004
3. Gli effetti di breve periodo delle agevolazioni: Il costo del debito, l'offerta di credito, gli investimenti e l'effetto del ciclo;M Bagella;Gli incentivi di politica industriale: presupposti teorici e valutazioni empiriche,1998
4. Growth, economies of scale, and targeting in japan;S Beason;The Review of Economics and Statistics,1955
5. Estimation of average treatment effects based on propensity scores;S Becker;Stata Journal,2002