Calculate the targeting ratio from incidence data with information on RCD

Calculate tau in RCD model when h1 and h2 are available

calculate_tau_rcd(h1, h2, alpha, rho, iota, nu, eta, r, rho2)

Arguments

h1

daily incidence, directly detected cases

h2

daily incidence, reactively detected cases

alpha

effective treatment probability

rho

observation rate

iota

RCD parameter: maximum number of index cases investigated per population per unit of time

nu

RCD parameter: number of secondary cases investigated per index case

eta

RCD parameter: probability that an investigated cases is detected (symptoms, test sensitivity, etc.)

r

blood clearance rate

rho2

RCD parameter: observation rate for reactively-detected cases

Value

a scalar equal to the targeting ratio tau.