calculate_exposure      Calculates the exposure rate applied to each
                        year provided month of policy implementation
                        and number of years to full implementation
dispatch_simulations    Execute simulations defined in a
                        optic_simulation object
exposure_list           Applies a time-varying treatment effect
model_terms             Parse a formula object into its left-hand-side
                        and right-hand-side components
optic_model             Optic Model
optic_simulation        Create a configuration object used to run
                        simulations
overdoses               OPTIC Overdoses example data.
