Table 4.

Observed Direction and Significance of Each Vertex and Edge Hypothesis from Section 5.3

Hypothesis	Result
Vertex mechanisms
Regularity	+ *
Inertial network effects (e.g., the lag term)	+ *
Embeddedness (three-cycle effect)	+ *
Seasonal effects	−*
Edge mechanisms
Assortative mixing	+ *
Individual-level heterogeneity	−*, + *
Contagious participation	+ *
Persistence/inertia	+ *
Embeddedness (nine-cycle)	+ *
Seasonality	−*

Note: Minus and plus signs denote negative and positive effects, respectively.

^*Significant effect.