Table 4.
OLS regression of numbers of authors, institutions, and references on synthesis center affiliation and control variables.
| # Authors | # Institutions | # References/10 | # InstitutionsT | # ReferencesT | |
|---|---|---|---|---|---|
| Synthesis center paper (1=yes) (95% confidence interval) | .870 (.75-.98) | 1.39 (1.29-1.50) | .777 (.68-.87) | 1.01 (.91-1.10) | .775*** (.68-.87) |
| Number of Authors | – | – | – | .453 | .004** |
| Constant | 2.86 | 4.01 | 5.62 | 2.67 | 5.6 |
| R2 adj | 0.27 | 0.13 | 0.15 | 0.37 | 0.15 |
| N | 396,852 | 396,852 | 396,852 | 396,852 | 396,852 |
Note: Although coefficients are not shown, we also controlled for year of publication and modal topic (indicator variables for 152 topics). “T” = truncated, “/10” = divided by 10 to rescale, 95% confidence intervals for synthesis dummy variable are in parentheses.
* = p < .05; ** = p < .01; *** = p < .001