Sector Switching: An Unexplored Dimension of Firm Dynamics in Developing Countries



Table 8: MEAN RELATIVE EFFICIENCY DIFFERENCES

by sector_________________

(1)
INC-
ENTRY
t-test

(2)

INC-EXIT
t-test

(3)

ENTRY-
EXIT

t-test

(4)

INC-SW1
t-test

(5)

INC-SW2
t-test

(6)
SW1-
ENTRY
t-test

(7)
SW2-
EXIT
t-test

ISIC 15

0.0137***

0.0001**

0.0000

0.0183

0.0002

0.0000

0.0000

(3.18)

(2.41)

(0.12)

(0.98)

(1.14)

(0.78)

(0.60)

ISIC 17

0.1687***

0.0014*

-0.0003*

0.1313

0.0002

0.0004**

0.0012**

(3.30)

(1.84)

(1.75)

(1.05)

(0.17)

(2.53)

(2.02)

ISIC 18

0.0907*** 0.0009***

0.0001

0.0982**

0.0004

-0.0001

0.0006***

(6.94)

(4.75)

(0.94)

(2.21)

(0.98)

(0.34)

(2.97)

ISIC 19

0.2474***

0.0021**

-0.0002

0.3207**

0.0028*

-0.0005

-0.0007

(3.41)

(2.42)

(0.30)

(2.25)

(1.73)

(0.63)

(0.87)

ISIC 20

0.1009***

0.0008**

-0.0002**

0.0802

0.0007

0.0002***

0.0001

(3.86)

(2.24)

(2.42)

(1.36)

(1.60)

(2.82)

(0.82)

ISIC 21

0.0760

0.0011*

0.0005

0.1498

0.0014

-0.0007

-0.0003

(1.42)

(1.69)

(0.86)

(1.54)

(1.27)

(0.84)

(1.12)

ISIC 22

0.1171***

0.0010**

-0.0001

0.1310

0.0000

-0.0001

0.0011

(3.07)

(2.02)

(0.19)

(0.99)

(0.05)

(0.14)

(1.47)

ISIC 24

0.1329***

0.0008*

-0.0005*

0.1425**

0.0013*

0.0000

-0.0005

(4.31)

(1.89)

(1.90)

(2.16)

(1.95)

(0.19)

(0.99)

ISIC 25

0.1083***

0.0010**

-0.0001

0.0181

0.0010

0.0009***

0.0000

(3.68)

(2.22)

(0.58)

(0.25)

(1.36)

(3.03)

(0.08)

ISIC 26

0.0251

0.0004*

0.0002

0.0640

0.0004

-0.0004

0.0000

(1.56)

(1.65)

(0.65)

(1.18)

(0.80)

(0.78)

(0.07)

ISIC 27

0.2762

0.0038

0.0011

0.3941

0.0015

-0.0008

0.0023**

(1.45)

(1.29)

(1.12)

(1.24)

(0.34)

(0.77)

(2.16)

ISIC 28

0.0720***

0.0003

-0.0004**

0.0197

0.0007**

0.0005**

-0.0003

(4.75)

(1.41)

(2.09)

(0.58)

(1.99)

(2.31)

(1.18)

ISIC 29

0.1938***

0.0013

-0.0008*

0.1337

0.0011

0.0007

0.0002

(2.82)

(1.32)

(1.75)

(1.02)

(0.95)

(1.09)

(0.20)

ISIC 31

0.2776***

0.0015

-0.0013

0.0373

0.0024

0.0024**

-0.0009

(3.17)

(1.08)

(1.41)

(0.20)

(1.28)

(2.32)

(0.53)

ISIC 32

0.9370***

0.0079

-0.0013

1.0713**

0.0084

-0.0001

-0.0005

(2.56)

(1.59)

(0.55)

(2.19)

(1.54)

(0.06)

(0.16)

ISIC 33

1.1092

0.0106

-0.0004

1.1227

0.0109

0.0005**

-0.0003

(1.26)

(1.32)

(0.64)

(1.12)

(0.96)

(2.38)

(0.47)

ISIC 34

0.3180

0.0017

-0.0012

-0.0515

0.0031

0.0037*

-0.0014

(1.61)

(0.65)

(0.56)

(0.16)

(1.22)

(1.76)

(0.61)

ISIC 35

0.1906**

0.0018

-0.0001

0.0433

0.0015

0.0015***

0.0003

(2.27)

(1.61)

(0.34)

(0.37)

(1.07)

(2.62)

(0.93)

ISIC 36

0.1107*** 0.0010***

-0.0001

0.0731*

0.0007*

0.0004***

0.0003

(5.42)

(3.00)

(0.92)

(1.85)

(1.79)

(3.37)

(1.34)

Sector difference negative
(percent of total sectors)

0.0

0.0

78.9

5.3

5.3

42.1

52.6

Percent positive
and significant

73.7

57.9

0.0

26.3

21.1

47.4

15.8

Note: Difference in weighted relative efficiency (t-stats in parenthesis - *, **, *** indicate significance at a 10%. 5% and 1% level,
respectively.). Numbers reported relates to the year 2003. A similar general pattern emerges using estimates from 2002. Incumbents
= INC. Sector Switchers = SW. Exits = EXIT. Entrants = ENTRY.

38



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