Zero {demest} | R Documentation

## Specify a prior that sets all terms to zero.

### Description

Specify a prior for a main effect or interaction in which `parameter[j] = 0`.

### Usage

    Zero()

### Details

In some cases, as with a dimension representing upper and lower Lexis triangles, setting all elements of the main effect or interaction to zero may make substantive sense. In other cases, a `Zero` prior to reduce the number of terms being estimated, while conforming to that requirement from `Model` that all terms marginal to an interaction be included in a model.

### Value

An object of class `SpecZero`.

### See Also

`Known` can be used to create a prior that fixes the main effect or interaction at values other than 0.

### Examples

    Zero()

[Package demest version 0.0.0.3.1 Index]