Likelihood-Based Evidence

Computes the strength of evidence for theta1 vs theta2: E(theta1, theta2) = logL(theta1) - logL(theta2)

evidence(model, data, theta1, theta2, ...)

Arguments

model

The likelihood model

data

Data frame for likelihood computation

theta1

First parameter value

theta2

Second parameter value

...

Additional arguments passed to loglik

Value

Evidence value (log likelihood ratio)

Details

Positive values favor theta1, negative values favor theta2.

Conventional interpretation (following Royall):

• |E| > log(8) ~ 2.08: Strong evidence

• |E| > log(32) ~ 3.47: Very strong evidence