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1.
Analysis of the behavior of technical inefficiency with respect to parameters and variables of a stochastic frontier model
is a neglected area of research in frontier literature. An attempt in this direction, however, has recently been made. It
has been shown that in a “standard” stochastic frontier model that both the firm level technical inefficiency and the production
uncertainty are monotonically decreasing with observational error. In this paper we show, considering a stochastic frontier
model whose error components are jointly distributed as truncated bivariate normal, that this property holds if and only if
the distribution of observational error is negatively skewed. We also derive a necessary and sufficient condition under which
both firm level technical inefficiency and production uncertainty are monotonically increasing with noise-inefficiency correlation.
We next propose a new measure of the industry level production uncertainty and establish the necessary and sufficient condition
for firm level technical inefficiency and production uncertainty to be monotonically increasing with industry level production
uncertainty. We also study the limiting probabilistic behavior of these conditions under different parametric configuration
of our model. Finally we carry out Monte Carlo simulations to study the sample behavior of the population monotonic property
of the firm level technical inefficiency and production uncertainty in our model.
相似文献
Arabinda DasEmail: |
2.
This paper introduces new and flexible classes of inefficiency distributions for stochastic frontier models. We consider both
generalized gamma distributions and mixtures of generalized gamma distributions. These classes cover many interesting cases
and accommodate both positively and negatively skewed composed error distributions. Bayesian methods allow for useful inference
with carefully chosen prior distributions. We recommend a two-component mixture model where a sensible amount of structure
is imposed through the prior to distinguish the components, which are given an economic interpretation. This setting allows
for efficiencies to depend on firm characteristics, through the probability of belonging to either component. Issues of label-switching
and separate identification of both the measurement and inefficiency errors are also examined. Inference methods through MCMC
with partial centring are outlined and used to analyse both simulated and real data. An illustration using hospital cost data
is discussed in some detail.
相似文献
M. F. J. SteelEmail: |
3.
Arnab Bhattacharjee Eduardo de Castro Chris Jensen-Butler 《Journal of Productivity Analysis》2009,31(3):195-212
We develop a model of labor productivity as a combination of capital-labour ratio, vintage of capital stock, regional externalities,
and total factor productivity (TFP). The skewness of TFP distribution is related to different growth theories. While negative
skewness is consistent with the neo-Schumpeterian idea of catching up with leaders, zero skewness supports the neoclassical
view that deviations from the frontier reflect only idiosyncratic productivity shocks. We argue that positive skewness is
consistent with an economy where exogenous technology is combined with non-transferable knowledge accumulated in specific
sectors and regions. This argument provides the framework for an empirical model based on stochastic frontier analysis. The
model is used to analyse regional and sectoral inequalities in Denmark.
相似文献
Arnab BhattacharjeeEmail: |
4.
Cost efficiency of Slovenian water distribution utilities: an application of stochastic frontier methods 总被引:2,自引:1,他引:1
Massimo Filippini Nevenka Hrovatin Jelena Zorić 《Journal of Productivity Analysis》2008,29(2):169-182
This study estimates cost inefficiency and economies of scale of Slovenian water distribution utilities over the 1997–2003
period by employing several different stochastic frontier methods. The results indicate that significant cost inefficiencies
are present in the utilities. An introduction of incentive-based price regulation scheme might help resolve this problem.
However, the inefficiency scores obtained from different cost frontier models are not found to be robust. The levels of inefficiency
estimates as well as the rankings depend on the econometric specification of the model. The established lack of robustness
can be at least partly explained by different ability of the models to separate unobserved heterogeneity from inefficiency.
Newly proposed true fixed effects model (Greene, J Econom 126:269–303, 2005; J Prod Anal 23(1):7–32, 2005) appears to perform
better than the conventional panel data models with respect to distinguishing between unobserved heterogeneity and inefficiency.
On the other hand, different models produce fairly robust results with respect to estimates of economies of output density,
customer density and economies of scale. The optimal size of a company is found to closely corresponds to the sample median.
Economies of scale are found in small-sized utilities, while large companies exhibit diseconomies of scale.
相似文献
Jelena Zorić (Corresponding author)Email: |
5.
Efficient frontier estimation: a maximum entropy approach 总被引:1,自引:0,他引:1
An alternative efficiency estimation approach is developed utilizing generalized maximum entropy (GME). GME combines the strengths
of both SFA and DEA, allowing for the estimation of a frontier that is stochastic, without making an ad hoc assumption about
the distribution of the efficiency component. GME results approach SFA results as the one-sided inefficiency bounds used by
GME shrink. Results similar to DEA are achieved as the bounds increase. The GME results are distributed like DEA, but yield
virtually the same rankings as SFA. The results suggest that GME may provide a link between various estimators of efficiency.
相似文献
Jon RezekEmail: |
6.
Alexandra M. Schmidt Ajax R. B. Moreira Steven M. Helfand Thais C. O. Fonseca 《Journal of Productivity Analysis》2009,31(2):101-112
This paper analyzes the productivity of farms across 370 municipalities in the Center-West region of Brazil. A stochastic
frontier model with a latent spatial structure is proposed to account for possible unknown geographical variation of the outputs.
The paper compares versions of the model that include the latent spatial effect in the mean of output or as a variable that
conditions the distribution of inefficiency, include or not observed municipal variables, and specify independent normal or
conditional autoregressive priors for the spatial effects. The Bayesian paradigm is used to estimate the proposed models.
As the resultant posterior distributions do not have a closed form, stochastic simulation techniques are used to obtain samples
from them. Two model comparison criteria provide support for including the latent spatial effects, even after considering
covariates at the municipal level. Models that ignore the latent spatial effects produce significantly different rankings
of inefficiencies across agents.
相似文献
Alexandra M. SchmidtEmail: URL: www.dme.ufrj.br/∼alex |
7.
The methodologies that have been used in existing research to assess the efficiency with which organic farms are operating
are generally based either on the stochastic frontier methodology or on a deterministic non-parametric approach. Recently,
Kumbhakar et al. (J Econom 137:1–27, 2007) proposed a new nonparametric, stochastic method based on the local maximum likelihood
principle. We use this methodology to compare the efficiency ratings of organic and conventional arable crop farms in the
Spanish region of Andalucía. Nonparametrically encompassing the stochastic frontier model is especially useful when comparing
the performance of two groups that are likely to be characterized by different production technologies.
相似文献
Teresa SerraEmail: Email: |
8.
This paper proposes a flexible time-varying stochastic frontier model. Similarly to Lee and Schmidt [1993, In: Fried H, Lovell
CAK, Schmidt S (eds) The measurement of productive efficiency: techniques and applications. Oxford University Press, Oxford],
we assume that individual firms’ technical inefficiencies vary over time. However, the model, which we call the “multiple
time-varying individual effects” model, is more general in that it allows multiple factors determining firm-specific time-varying
technical inefficiencies. This allows the temporal pattern of inefficiency to vary over firms. The number of such factors
can be consistently estimated. The model is applied to data on Indonesian rice farms, and the changes in the efficiency rankings
of farms over time demonstrate the model’s flexibility.
相似文献
Young H. LeeEmail: |
9.
Sanna-Mari Hynninen 《Journal of Productivity Analysis》2009,31(1):15-26
This paper investigates the technical efficiency of labor market matching from a stochastic frontier approach. The true fixed-effects
model (Greene J Prod Anal 23:7–32, 2005a; J Econom 126:269–303, 2005b) is utilised in order to separate cross-sectional heterogeneity from inefficiency, and inefficiency terms are modelled following
Battese and Coelli (Empir Econ 20:325–332, 1995). The data set consists of almost 17,000 observations from Local Labor Offices (LLOs) in Finland. According to the results,
there are notable differences in matching efficiency between regions, and these differences contribute significantly to the
number of filled vacancies. If all regions were as efficient as the most efficient one, the number of total matches per month
would increase by over 23%. The heterogeneity of the job-seeker stock is an important determinant of matching efficiency:
the weight of the composition of the job-seeker stock in the inefficiency terms is on average 85%.
相似文献
Sanna-Mari HynninenEmail: |
10.
Joan-Lluis Capelleras Rodrigo Rabetino 《The International Entrepreneurship and Management Journal》2008,4(1):79-99
New ventures are increasingly playing an important role in Latin American economies. However, little is known about the determinants
of new firm growth in this context. The purpose of this study is to gain an understanding of the factors influencing new firm
growth in Argentina, Brazil, Mexico and Peru. Individual, organizational and environmental factors are included in an empirical
model, which is tested using data collected by face-to-face interviews with 582 entrepreneurs. Different specifications of
employment growth and regression approaches are employed. Results suggest that growth strongly depends on the characteristics
of the entrepreneur. National environment and firm-related factors are also important factors in determining growth.
相似文献
Rodrigo RabetinoEmail: |
11.
The effects of match uncertainty and bargaining on labor market outcomes: evidence from firm and worker specific estimates 总被引:3,自引:0,他引:3
In this paper we examine wage dispersion in labor markets across currently employed workers. We argue that differences in
the potential productivity of a match (typically assumed to be known in the previous literature) generates a surplus between
the minimum wage the worker is willing to accept and the maximum wage the firm is willing to offer for the job. Existence
of this surplus leads to wage dispersion due to negotiating over the amounts extracted by each agent. Our objective is to
estimate the surplus extracted by each firm-worker pair and the effect of the net extracted surplus on the wage, for each
firm-worker pair using the two-tier stochastic frontier model. An empirical application finds that, on average, firms paid
workers less than their expected productivity. More specifically, at the mean, the net effect of productivity uncertainty
leads to equilibrium wages which are 3.33% below the expected productivity of matches.
相似文献
Christopher F. ParmeterEmail: |
12.
Measuring performance in the presence of stochastic demand for hospital services: an analysis of Belgian general care hospitals 总被引:1,自引:1,他引:0
Mike Smet 《Journal of Productivity Analysis》2007,27(1):13-29
Since demand for hospital services is subject to substantial variability, the relationship between uncertain demand, excess
capacity, hospital costs and performance should be investigated thoroughly. In this paper a waiting time indicator to proxy
hospital standby capacity is incorporated into a multi-product translog cost function for Belgian general care hospitals.
The indicator is derived from queuing theory and improves on the conventionally used (inverse of the) occupancy rate. The
multi-product stochastic frontier specification allows calculation of cost elasticities and marginal cost of seven hospital
departments, as well as the degree of economies of scale and scope and enables identification of differences in efficiency.
相似文献
Mike SmetEmail: |
13.
In this paper, we address the question of Data Envelopment Analysis (DEA) evaluation of efficiency when aggregate cost or
revenue data must be used. We show that the DEA technical inefficiency measure using total revenues as the single output variable
or total costs as the single input variable equals the aggregate technical and allocative inefficiency. We employ this result
to estimate allocative inefficiency and construct statistical tests of the null hypothesis of no allocative inefficiency analogous
to those of the null hypothesis of no scale inefficiency. We illustrate our method using revenue and personnel data for the
top U.S. public accounting firms over 1995–1998. Our empirical results indicate the existence of statistically significant
allocative inefficiency in the public accounting industry.
相似文献
Ram NatarajanEmail: |
14.
Laurent Weill 《Journal of Productivity Analysis》2008,29(2):79-89
This paper aims at comparing macroeconomic performance of three European socialist economies (Hungary, Poland, Yugoslavia)
with developing and developed countries during the 1970s and the 1980s. Using panel data for 89 countries, we measure macroeconomic
performance with two panel data production frontier models: the WITHIN model proposed by (Cornwell et al J Econom 46:185–200,
1990), and the firm effects model developed by (Battese and Coelli J Prod Anal 3:153–169, 1992). We conclude in favor of the
underperformance of socialist countries in relation to developed countries but also to developing countries in most cases,
which may be explained by the features of the socialist economic system.
相似文献
Laurent WeillEmail: |
15.
Thijs ten Raa 《Journal of Productivity Analysis》2008,30(3):191-199
Debreu’s coefficient of resource utilization is freed from individual data requirements. The procedure is shown to be equivalent
to the imposition of Leontief preferences. The rate of growth of the modified Debreu coefficient and the Solow residual are
shown to add up to TFP growth. This decomposition is the neoclassical counterpart to the frontier analytic decomposition of
productivity growth into technical change and efficiency change. The terms can now be broken down by sector as well as by
factor input.
相似文献
Thijs ten RaaEmail: |
16.
Technical efficiency in farming: a meta-regression analysis 总被引:1,自引:0,他引:1
Boris E. Bravo-Ureta Daniel Solís Víctor H. Moreira López José F. Maripani Abdourahmane Thiam Teodoro Rivas 《Journal of Productivity Analysis》2007,27(1):57-72
A meta-regression analysis including 167 farm level technical efficiency (TE) studies of developing and developed countries
was undertaken. The econometric results suggest that stochastic frontier models generate lower mean TE (MTE) estimates than
non-parametric deterministic models, while parametric deterministic frontier models yield lower estimates than the stochastic
approach. The primal approach is the most common technological representation. In addition, frontier models based on cross-sectional
data produce lower estimates than those based on panel data whereas the relationship between functional form and MTE is inconclusive.
On average, studies for animal production show a higher MTE than crop farming. The results also suggest that the studies for
countries in Western Europe and Oceania present, on average, the highest levels of MTE among all regions after accounting
for various methodological features. In contrast, studies for Eastern European countries exhibit the lowest estimate followed
by those from Asian, African, Latin American, and North American countries. Additional analysis reveals that MTEs are positively
and significantly related to the average income of the countries in the data set but this pattern is broken by the upper middle
income group which displays the lowest MTE.
相似文献
Teodoro RivasEmail: |
17.
Juan José Díaz-Hernández Eduardo Martínez-Budría Sergio Jara-Diaz 《Journal of Productivity Analysis》2008,30(3):223-232
Port workers services have been usually heavily regulated and reserved exclusively for a special kind of workers, dockworkers,
which seems to have been the cause of serious inefficiencies worldwide. During the eighties, law reforms have been introduced
to solve this problem. In this paper we analyze and decompose efficiency in cargo handling operations in 19 Spanish ports
from 1990 to 1998. The method chosen is that of the parametric estimation of both allocative and technical inefficiency using
panel data and a quadratic cost function. Results show that although inefficiency has decreased overall, there has been over
utilization of labor regarding capital, and technical inefficiency. This supports the need of further consideration of other
aspects including competition.
相似文献
Juan José Díaz-HernándezEmail: |
18.
This contribution investigates the efficiency of water suppliers in rural areas of East and West Germany. A non-radial measure
of input specific allocative inefficiency is used to reduce the distributional dependency with respect to the inefficiency
parameters. It is based on the demand system of a flexible cost function for the variable inputs labour, energy and chemicals
modelled by applying a modified symmetric generalized McFadden functional form. Concavity restrictions, as required by economic
theory, are imposed. The analysis reveals that efforts towards increasing suppliers’ allocative efficiency should focus on
the relatively inefficient usage of the input chemicals. The input specific allocative model specification was found to be
superior to the overall allocative specification.
相似文献
Johannes SauerEmail: |
19.
Partial derivatives of production functions are necessary in many instances to characterize the technology of firms. We present here a general method to recover the first derivatives of the production function of a profit maximizing firm. The method is systematic and applies even when the optimization problem of the firm is subject to additional constraints. It allows researcher to recover returns to scale and technological progress in complex situations.
相似文献
Stéphane VigeantEmail: |
20.
The impact of desirability and feasibility on entrepreneurial intentions: A structural equation model 总被引:2,自引:1,他引:1
Maribel Guerrero Josep Rialp David Urbano 《The International Entrepreneurship and Management Journal》2008,4(1):35-50
There is general agreement that attitudes towards entrepreneurship are determinant factors to decide to be an entrepreneur.
In this context, this research is focused on analyzing the relationship between desirability and feasibility on university
student’s intentions to create a new firm in Catalonia. A structural equation model supported by Krueger & Brazeal’s Model
was tested with different groups of students. The main results reveal most of university students consider desirable to create
a new firm, although the perception of feasibility is not positive. Also, there is a statistical significant and positively
relationship between credibility and the intention to create a new firm.
相似文献
David Urbano (Corresponding author)Email: |