MultiplierDEA (version 0.1.19)

SDEA: Super-Efficiency DEA

Description

SDEA model to calculate the efficieny for each DMUs.

Usage

SDEA(x=x, y=y, orientation = "input", rts = "crs", Cook = FALSE)

Value

Input

Input Values (x) passed to the model.

Output

Output Values (y) passed to the model.

Orientation

Orientation of the model.

RTS

Returns to scale of the model.

Efficiency

Efficiency of each DMU in the model.

Theta

Used to calculate efficiency if the model is infeasiable. Note: Available only when Cook is set to TRUE.

Beta

Used to calculate efficiency if the model is infeasiable.Note: Available only when Cook is set to TRUE.

Lambda

Lambdas per DMU in the model.

StatusData

Returns the status of the LP model.

Arguments

x

Inputs or resources used by each decision making unit.

y

Outputs or resources used by each decision making unit.

orientation

Orientation of the DEA model - primary emphasis on input-reduction input or output-augmentation output. Note the default is input orientation.

rts

Returns to scale for the application, or industry studied. Note the default rts is crs. vrs Variable returns to scale. crs Constant returns to scale.

Cook

Used with variable returns to scale to address infeasibility in efficiency. Note the default is FALSE. Use TRUE when using vrs rts.

References

W.D. Cook, L. Liang, Y. Zha and J.Zhu (2009) A Modified Super-Efficiency DEA Model for Infeasibility, The Journal of the Operational Research Society Vol. 60, No. 2 (Feb., 2009), pp. 276-281.

Examples

x <-data.frame(matrix(c(12, 26, 16, 60 ),ncol=1))
rownames(x) <- c('a','b','c','d')
y <- data.frame(matrix(c(6, 8, 9, 15 ),ncol=1))
rownames(y) <- c('a','b','c','d')


result <- SDEA(x=x, y=y, orientation = "input", rts = "crs", Cook = FALSE)
# Examine the efficiency score for DMUs
print(result$Efficiency)