LRdate {mispitools}

Likelihood ratio for birth date in missing person searches

Description

Likelihood ratio for birth date in missing person searches

Usage

LRdate(
  ABD = "1976-05-31",
  DBD = "1976-07-15",
  PrelimData,
  alpha = c(1, 4, 60, 11, 6, 4, 4),
  cuts = c(-120, -30, 30, 120, 240, 360),
  draw = 500,
  type = 1,
  seed = 123
)

Arguments

ABD

Actual birth date of the missing person.

DBD

Declared birth date of the person of interest.

PrelimData

Used when type = 2, is the dataframe with the DBD of the persons of interest in the database.

alpha

A vector containing the alpha values for the dirichlet. It should contain the number of categories of differences between DBD and ABD.

cuts

Value of differences between DBD and ABD used for category definition.

draw

Number of simulations for Dirichlet distribution computation.

type

Type of scenario, type 1 is an "open search", where it is unknown if the missing person is in the database. Type 2 refers to a scenario where the missing person is in the database.

seed

Seed for simulations.

Value

A value of Likelihood ratio based on preliminary investigation data. In this case, birth date.

Examples

library(DirichletReg)
LRdate(ABD = "1976-05-31", DBD = "1976-07-15", 
PrelimData, alpha = c(1, 4, 60, 11, 6, 4, 4), 
cuts = c(-120, -30, 30, 120, 240, 360), 
type = 1, seed = 123)