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随机前沿分析和数据包络分析
前沿和效率分析：随机前沿分析(Stochastic Frontier Analysis,SFA ) Model frameworks for production or cost
- Normal-half normal
- Normal-truncated normal
- Normal-exponential
- Normal-gamma
Mean of the one sided (inefficiency) component
- E[U] = zero mean, the standard case
- E[U] = nonzero constant mean
- E[U] = a'z
Variance of the one sided (inefficiency) component
- Var[U] = homoscedastic
- Var[U] = exp(c'z) (heteroscedastic)
Variance of the firm specific (symmetric) component
- Var[v] = homoscedastic
- Var[v] = exp(d'w) (heteroscedastic)
Doubly heteroscedastic
Estimates of inefficiency measures with all formulations
Panel data formulations
- Random effects in specifications
- Fixed effects
- Fixed effect in production (cost) function
- Truncation model with fixed effects
- Fixed effects in mean of one sided component
- Fixed effects in variance of one sided component
- Random parameters
- Latent class
- Battese and Coelli panel data models
前沿和效率分析：数据包络分析(Data Envelopment Analysis,DEA )
Analysis in parallel with stochastic frontier estimation and analysis (the only package available that has both of these methods in one program)
- Input and output oriented inefficiency – retained in the data set for further analysis
- Constant, increasing or nonincreasing returns to scale
- Economic and allocative inefficiency
- Bootstrapped confidence intervals for efficiency scores
- Malmquist total factor productivity indexes for panel data
- Listing of ‘peer’ firms with results
LIMDEP是目前市面上唯一一套同时提供随机前沿分析和数据包络分析的软件包。
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