Do the usual results of railway returns to scale and density hold in the case of heterogeneity in outputs? : a hedonic cost function approach

Do the Usual Results of Railway Returns to Scale and Density Hold in the Case of Heterogeneity in Outputs?<BR> A Hedonic Cost Function Approach

Wheat, Phill, (2015)

Assessing the Marginal Infrastructure Maintenance Wear and Tear Costs for Britain's Railway Network

Wheat, Phill, (2008)

Estimation of cost inefficiency in panel data models with firm specific and sub-company specific effects

Smith, Andrew S. J., (2012)