Twelve regional councils have renewed their call for a socio-economic study of Tasmania's forest peace deal, on the eve of an Upper House inquiry.
The councils are calling on Upper House MPs to demand a socio-economic study be done into the peace agreement.
A spokesman for the group, Dorset Mayor Barry Jarvis, says the study is essential.
"To understand what the outcomes will be if reserves and industry is squeezed down," he said.
"We believe that should have been an imperative from the start. We've been disappointed that they haven't heeded our calls for two-and-a-half years."
Up to 40 people from industry and environmental groups as well as government departments are expected to front the hearings.
MLCs expect the final report to be ready for the first parliamentary sitting date in March.