What Drives the Productive Efficiency of a Firm?: The Importance of Industry, Location, R&D, and Size



Table 1: Estimation results of the logarithmic Translog production function
with fixed effects, years 1992-2005

Variable

Coefficient

p-value

βmat

0.2Ô9

<.0001

βlab

0.229

<.0001

βene

0.028

0.0016

βcap

0.245

<.0001

βoth

0.167

<.0001

βext

0.116

<.0001

β2 mat

0.055

<.0001

в2_lab

0.073

<.0001

β2 ene

0.007

<.0001

в2_cap

0.027

<.0001

в2_oth

0.026

<.0001

в2_ext

0.016

<.0001

γmat_ lab

-0.057

<.0001

γmat_ ene

-0.001

0.2093

γmat_ cap

-0.02

<.0001

γmat_ oth

-0.008

<.0001

γmat_ ext

-0.017

<.0001

γlab_ene

-0.009

<.0001

γlab_cap

-0.033

<.0001

γlab_oth

-0.036

<.0001

γlab_ext

-0.012

<.0001

γene_cap

0.003

0.0016

γene _oth

-0.003

<.0001

γene _ext

-0.001

0.0002

γca p_oth

-0.009

<.0001

Ycap_ext

-0.001

0.0191

γoth _ext

0.001

0.1135

D1992

0.022

<.0001

D1993

0.009

<.0001

D1994

0.012

<.0001

D1995

0.017

<.0001

D1996

0.011

<.0001

D1997

0.015

<.0001

D1998

0.013

<.0001

D1999

0.017

<.0001

D2000

0.014

<.0001

D2001

0.006

<.0001

D2002

-0.004

0.0146

D2003

-0.002

0.0711

_____________D2004_________

___________0.003

0.0236

R2

0.995

Number of observations

217,415

Notes: mat: material inputs, lab: labor compensation, ene: energy consumption, cap:
capital, oth: other inputs, ext: external services.

hypothesis β2 i = 0 and γij = 0 for all i and j. This null hypothesis is strongly rejected (p-
value 0.0001) indicating that the translog specification is more appropriate. Second, the H0
that (∑β2-i + ∑γij) (j'=i) is equal to zero13 is not rejected (p-value = 0.41). This indicates a
13This sum of estimates is 0.000474, with a standard error of 0.000572.



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