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Table 4 The number of edges and self-loops for each pipeline status in the drug pipeline layer

From: Multilayer network analysis of the drugs development cycle in the global pharmaceutical industry

p: pipeline status

\(M_1 ^p\): # of edges

\(L_1 ^p\): # of self-loops

      Total

Discovery

4488

13,668

18,156

Phase I clinical

818

1716

2534

Phase II clinical

1255

1941

3196

Phase III clinical

538

630

1168

Pre-registration

165

189

354

Registered

120

155

275

Launched

4065

2527

6592