Table 2 Efficiency scores (original and bias-corrected), bias, and rankings of SSA countries

Namibia

0.979

6

0.01

0.969

1

Zambia

0.977

8

0.013

0.964

2

Malawi

1

3

0.043

0.957

3

Mozambique

0.978

7

0.039

0.94

4

South Africa

0.943

10

0.009

0.934

5

Eswatini

0.937

12

0.011

0.926

6

Kenya

0.938

11

0.013

0.924

7

Rwanda

0.937

13

0.018

0.919

8

Lesotho

0.913

14

0.019

0.894

9

Uganda

0.905

15

0.014

0.891

10

Ghana

0.882

17

0.013

0.869

11

Tanzania

0.89

16

0.028

0.862

12

Burundi

1

3

0.163

0.837

13

Gambia, The

0.86

18

0.026

0.834

14

Senegal

0.843

19

0.031

0.812

15

Benin

0.831

20

0.029

0.802

16

Burkina Faso

0.827

22

0.031

0.796

17

Guinea

0.831

21

0.038

0.793

18

Congo, Rep

0.779

23

0.018

0.761

19

Cote d'Ivoire

0.755

24

0.01

0.744

20

Congo, Dem. Rep

1

3

0.262

0.738

21

Ethiopia

0.949

9

0.227

0.722

22

Mauritania

0.731

25

0.014

0.717

23

Cameroon

0.712

26

0.013

0.699

24

Nigeria

0.708

28

0.009

0.699

25

Mali

0.712

27

0.025

0.687

26

Central African Rep

1

3

0.323

0.677

27

Angola

0.675

29

0.009

0.666

28

Sudan

0.655

30

0.008

0.647

29

Niger

1

3

0.377

0.623

30

Mean (95% CI)

0.872 (0.830 – 0.913)

0.061

0.810 (0.770 – 0.850)