Table 3 Maximum likelihood estimates of the stochastic production frontier function of performances in combating COVID-19 of different states of India (Dependent variable: LRR (Log of Recovery Rate) No of Observations: 20)

Constant

β₀

0.109

0.093

1.165

ln (DOCTOR)(x₁)

β₁

0.151^a

0.046

3.270

ln (NURSE)(x₂)

β₂

0.198^c

0.113

1.754

ln (Police)(x₃)

β₃

0.082^c

0.050

1.656

ln (Isolation beds)(x₄)

β₄

0.127^a

0.048

2.624

ln (Quarantine)(x₅)

β₅

0.007

0.026

0.288

ln (ICU beds)(x₆)

β₆

0.273^b

0.136

2.003

ln (Ventilators)(x₇)

β₇

−0.400^a

0.080

−4.992

ln (Labs)(x₈)

β₈

3.410^b

1.366

2.496

ln (Tested)(x₉)

β₉

−0.343^b

0.166

− 2.074

ln (Elderly)(z₁)

δ₁

0.952^a

0.302

3.150

ln (SR)(z₂)

δ₂

1.018^a

0.388

2.621

ln (LR)(z₃)

δ₃

−3.078^a

0.955

−3.223

ln (Urban)(z₄)

δ₄

−1.689^b

0.825

− 2.048

ln (Sleep) (z₅)

δ₅

0.050

0.997

0.050

ln (Diabetes) (z₆)

δ₆

2.526^a

0.703

3.591

ln (Heart) (z₇)

δ₇

1.829^b

0.885

2.067

ln (Population density) (z₈)

δ₈

1.212^b

0.589

2.059

ln (PCNSDP) (z₉)

δ₉

−0.668^b

0.267

−2.506

ln (Employment) (z₁₀)

δ₁₀

1.610^a

0.503

3.201

ln (Digitalisation) (z₁₁)

δ₁₁

−0.561

0.375

− 1.497

1.689^b

0.825

2.048

0.265^c

0.149

1.783

0.920^a

0.073

12.672

16.445