Fig 1.
Multiple relationships in a hypothetical simple 2-person world of three substance use behaviors.
Fig 2.
Reconstruction of marijuana use measure at t1 (In-School Survey).
Table 1.
Descriptive statistics.
Table 2.
Stochastic actor-based models of substance use of cigarettes, alcohol, and marijuana and friendship networks with number of friends who smoked/drank/used marijuana effects.
Table 3.
Stochastic actor-based models decomposing interdependent substance use into increases (creation function) and decreases (endowment function).
Fig 3.
The simulation results of smoking, drinking, and marijuana use levels in Sunshine High under various scenarios setting coefficients to zero.
Note: mtos–effect from marijuana use to smoking; mtod–effect from marijuana use to drinking; mtosd–effects from marijuana use to both smoking and drinking; infs–peer influence effect in smoking; infd–peer influence effect in drinking; infm–peer influence effect in marijuana use; selm–peer selection effect in marijuana use; selall–peer selection effects in smoking, drinking, and marijuana use; all–all above effects.