Wage loss benefits under Alaska WC law are based on your actual earnings.
How they are calculated is defined by law. The method of calculation for temporary total disability is provided at AS 23.30.185. Calculation of compensation of permanent partial disability is at AS 23.30.190. Temporary partial disability is at AS 23.30.200.
The State publishes copensations rate tables http://labor.state.ak.us/wc/2009rate/home.htm
There is no need for a hearing before the Board unless the insurer pays the wrong rate and fails to issue correct payment after being provided with copies of your pay stubs.