Table 2.

Patterns of collaboration over time among IRI core faculty and fellows (numbers are reported ties for each network)

	2012	2013	2014
Types of collaboration
New research	89	131	142
Grants	41	49	82
Presentations	28	39	47
Publications	26	40	55
Number of different types of collaboration
1 type of collaboration	68	84	95
2 types of collaboration	25	35	52
3 types of collaboration	12	15	20
4 types of collaboration	7	14	14