next up previous contents
Next: Multiplicative Variance Growth Model Up: Calculations Previous: Inverse Gamma

Constant Variance Growth Model

An often used prior for the variance, tex2html_wrap_inline2733 also denoted tex2html_wrap_inline3365 is inverse gamma, that is to say;

equation1389

Now the posterior for tex2html_wrap_inline3365 may be calculated as follows, where the data, tex2html_wrap_inline2135 consists of n observations;

displaymath3373

and noting that

displaymath3375

The posterior will also be inverse gamma, as follows;

eqnarray1413

where

equation1468



Cathal Walsh
Sat Jan 22 17:09:53 GMT 2000