Table 3. Collaborating Dyads by Treatment Status.

Sample Means	Collaborations within the same room	Collaborations across rooms	Difference
One postdoc	0.421	0.212	-0.209
Both postdocs	0.000	0.030	0.030
One female	0.474	0.303	-0.140
Both female	0.158	0.061	-0.097
Same hospital	0.579	0.636	0.057
Both Longwood	0.158	0.303	0.145
One imager + one clinician	0.474	0.485	0.011
Both imagers	0.316	0.394	0.078
Same clinical area (SOI)	0.579	0.273	-0.306*
Previous coauthor	0.105	0.121	0.016
Observations	19	33

Notes: The unit of observation is a dyad of researchers. We construct dyads by creating every possible pairwise combination of researchers attending on the same night (26,604 dyads) but here we focus on researchers who attend on the same night and appeared on a common pilot grant or concept award application (52 dyads). See Section III in the text for a detailed description of the variables. Stars indicate the results of t-tests for equality of means.

⁺p < 0.10,

^*p < 0.05,

^**p < 0.01.