Table 2 Relational hyperevent model assessment: comparing the covariate, the network, and the joint models.

Age difference

0.498

(0.460–0.540)

− 0.697

(0.041)

***

0.521

(0.477–0.568)

− 0.652 (0.045)

***

Avg. age of the referrals

1.004

(0.950–1.062)

0.004

(0.029)

1.020

(0.960–1.083)

0.019

(0.031)

Age of the referee

1.746

(1.632–1.868)

0.557

(0.034)

***

1.612

(1.496–1.737)

0.477

(0.038)

***

Sex difference

(males = 1, females = 2)

2.023

(1.892–2.164)

0.705

(0.034)

***

1.873

(1.738–2.020)

0.628

(0.038)

***

Sex of the referrals

1.091

(1.019–1.167)

0.087

(0.035)

*

1.113

(1.028–1.204)

0.107

(0.040)

**

Sex of the referee

1.047

(1.006–1.089)

0.046

(0.020)

*

1.040

(0.997–1.084)

0.039

(0.021)

Referral in public sector

0.707

(0.601–0.832)

− 0.347

(0.083)

***

0.753

(0.637–0.890)

− 0.284 (0.085)

***

Referee in public sector

0.965

(0.937–0.995)

− 0.035

(0.015)

*

0.957

(0.927–0.987)

− 0.044 (0.016)

**

Referral in medical sector

0.835

(0.697–0.998)

− 0.181

(0.092)

*

0.878

(0.738–1.045)

− 0.130 (0.089)

Referee in medical sector

1.000

(0.974–1.027)

0.000

(0.014)

0.997

(0.969–1.025)

− 0.003 (0.014)

Active workforce difference

(Active = 1, non-active = 0)

1.182

(1.078–1.296)

0.167

(0.047)

***

1.253

(1.128–1.392)

0.226

(0.054)

***

Active referrals

0.430

(0.391–0.474)

− 0.843

(0.050)

***

0.493

(0.440–0.553)

− 0.707 (0.058)

***

Active referees

2.286

(2.117–2.468)

0.827

(0.039)

***

2.276

(2.093–2.475)

0.822

(0.043)

***

Individual contact popularity

(in-degree of the referral)

0.006

(0.003–0.011)

− 5.139

(0.309)

***

0.008

(0.004–0.014)

− 4.878 (0.306)

***

Joint contact popularity

1.116

(1.081–1.152)

0.110

(0.016)

***

1.110

(1.063–1.158)

0.104

(0.022)

***

Reciprocation

1.131

(1.111–1.152)

0.123

(0.009)

***

1.111

(1.088–1.134)

0.105

(0.010)

***

In-degree of the referee

0.229

(0.195–0.271)

− 1.472

(0.084)

***

0.307

(0.258–0.365)

− 1.182 (0.088)

***

Out-degree of the referral

0.056

(0.038–0.082)

− 2.880

(0.195)

***

0.070

(0.048–0.103)

− 2.655 (0.194)

***

Nominations among contacts

1.077

(1.062–1.092)

0.074

(0.007)

***

1.081

(1.066–1.097)

0.078

(0.007)

***

Shared referee

1.110

(1.089–1.131)

0.104

(0.010)

***

1.104

(1.084–1.124)

0.099

(0.009)

***

AIC

9375.042

8592.547

6293.281

Num. events

1179

1179

1179

Num. obs

1,250,975

1,250,975

1,250,975