Download presentation
Presentation is loading. Please wait.
1
Efficiency Measurement
William Greene Stern School of Business New York University
2
Lab Session 3 Heterogeneity
4
WHO Data
5
Heterogeneous Frontier Command
FRONTIER [; COST] ; LHS = the variable ; RHS = ONE, the variables, the additional variables ; EFF = the new variable $ ε(i) = v(i) +/- u(i)
6
Heterogeneous Frontier Model
FRONTIER ; LHS = LDALE ; RHS = ONE,LHEXP,LHEXP2,LEDUC, VOICE,GEFF,LPOPDEN,TROPICS ; EFF = UI_WHO $
8
Heteroscedasticity
9
Effects of Environmental Variable on Efficiency
? Frontier cost function with environmental ? Variables, load factor, points served, stage ? Length. FRONTIER ; Cost ; Lhs = lc ; Rhs = one,…, loadfctr,log(points),log(stage) $ ? How does load factor affect efficiency? SIMULATE ; scenario: & loadfctr = .4(.025).95 ; plot $
11
Efficiency Estimates|Load Factor
13
Model Command for Heteroscedasticity
16
Heterogeneity in the Mean of u(i)
19
Nonparametric Frontier
Frontier with local Compute residuals then estimate and given the set of residuals from the nonparametric frontier Compute efficiencies using residuals and and
20
Parametric vs. Nonparametric
23
Latent Class Model
Similar presentations
![[Part 5] 1/53 Stochastic FrontierModels Heterogeneity Stochastic Frontier Models William Greene Stern School of Business New York University 0Introduction.](/11/3189205/big_thumb.jpg "[Part 5] 1/53 Stochastic FrontierModels Heterogeneity Stochastic Frontier Models William Greene Stern School of Business New York University 0Introduction.>")
![[Part 3] 1/49 Stochastic FrontierModels Stochastic Frontier Model Stochastic Frontier Models William Greene Stern School of Business New York University.](/15/4666432/big_thumb.jpg "[Part 3] 1/49 Stochastic FrontierModels Stochastic Frontier Model Stochastic Frontier Models William Greene Stern School of Business New York University.>")
![Part 21: Hazard Models [1/29] Econometric Analysis of Panel Data William Greene Department of Economics Stern School of Business.](/16/4906583/big_thumb.jpg "Part 21: Hazard Models [1/29] Econometric Analysis of Panel Data William Greene Department of Economics Stern School of Business.>")
![[Part 7] 1/68 Stochastic FrontierModels Panel Data Stochastic Frontier Models William Greene Stern School of Business New York University 0Introduction.](/18/6142499/big_thumb.jpg "[Part 7] 1/68 Stochastic FrontierModels Panel Data Stochastic Frontier Models William Greene Stern School of Business New York University 0Introduction.>")
