Graham, Daniel J.; Couto, Antonio; Adeney, William E.; … - In: Transportation Research Part E: Logistics and … 39 (2003) 6, pp. 443-458
This paper examines economies of scale and density in urban rail transport. It isolates the effects of constant and non-constant returns on output and productivity growth using data relating to 17 rail systems in cities around the world. Estimates reveal constant returns to scale but increasing...