eff.ssfa {ssfa}

SSFA efficiency

Description

This function returns the technical efficiency of each producer (without local spatial effects) calculated by the Battese and Coelli (1988) formulation modified by using an autoregressive specification in the inefficiency term u.

Usage

eff.ssfa(object, ...)

Arguments

object

an object of class ssfa.

...

further arguments for methods.

Value

Technical efficiency of each producer (without local spatial effects).

References

Battese, G. E., and T. J. Coelli (1988). Prediction of Firm-level Technical Efficiencies with a Generalized Frontier Production Function and Panel Data. Journal of Econometrics 38(3): 387-399.

Fusco, E. and Vidoli, F. (2013). Spatial stochastic frontier models: controlling spatial global and local heterogeneity, International Review of Applied Economics, 27(5) 679-694.

Fusco, E. (2020). Spatial Dependence in Efficiency Parametric Models: A Generalization and Simulation Studies, "Scienze Regionali, Italian Journal of Regional Science" Speciale/2021, 595-618.

Kumbhakar, S. C., and C. A. K. Lovell (2000). Stochastic Frontier Analysis, Cambridge University Press.

See Also

u.ssfa

Examples

library(ssfa) 
data(SSFA_example_data)
data(Italian_W)
ssfa <- ssfa(log_y ~ log_x, data = SSFA_example_data, data_w=Italian_W, 
             form = "production", par_rho=TRUE)
eff <- eff.ssfa(ssfa)