1. Optimal size in the waste collection sector;Barbara & Antonioli;Review of Industrial Organization,2002
2. Gasto municipal por el servicio de residuos s�lidos urbanos;Germ� Bel;Revista de Econom�a Aplicada,2006
3. Do public sector reforms get rusty? Local privatization in Spain;Germ� & Bel;Journal of Policy Reform,2006
4. Why do local governments privatize public services? A survey of empirical studies;Germ� & Bel;Local Government Studies,2007