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Table 5 Factors that affects the diffusion of NCE products: Panel regression for Antineoplastic agents and immunomodulating agents (ATC L)

From: Differential diffusion of pharmaceutical innovations in a mixed market middle - income economy

Model 3

Model 3(a) and Model 3(b)

     

Public

Private

Variable

Coefficient

 

Standard Error

Variable

Coefficient

 

Standard Error

Coefficient

 

Standard Error

Intercept

1.892

 

(2.124)

Intercept

4.299

 

(3.509)

-0.768

 

(2.189)

Drug characteristic

 Ln price per DDD

-1.186

**

(0.379)

Ln price per DDD

-1.588

*

(0.661)

-0.821

 

(0.405)

Structure and environment characteristics

 Generic share (DDD)

-2.222

*

(1.062)

Generic share (DDD)

-4.279

***

(0.623)

-0.256

 

(0.492)

 Market concentration (HHI)

-3.094

*

(1.314)

Market concentration (HHI)

-4.194

**

(1.441)

-2.263

 

(1.134)

Year after registration

 Year 1

1.566

**

(0.495)

Year 1

1.341

***

(0.267)

1.826

***

(0.511)

 Year 2

2.530

***

(0.460)

Year 2

2.504

***

(0.187)

2.568

***

(0.491)

 Year 3

2.696

***

(0.519)

Year 3

2.786

***

(0.278)

2.636

***

(0.608)

 Year 4

2.959

***

(0.563)

Year 4

3.023

***

(0.434)

3.008

***

(0.587)

 Year 5

3.199

***

(0.581)

Year 5

3.015

***

(0.382)

3.540

***

(0.601)

R – squared

0.788

  

R - squared

0.766

  

0.780

  

Corr (u_i, Xb)

-0.535

  

Corr (u_i, Xb)

-0.855

  

0.284

  

Rho

0.841

  

Rho

0.932

  

0.859

  

Number of observations

202

  

Number of observations

93

  

109

  
  1. * P < 0.05; ** P < 0.01; *** P < 0.001