These three pdfs summarize Direct Tradable Quotas (DTQ), a trading system for carbon emissions allowances published by the Tyndall Centre, and a PhD student who works with them.

The first pdf is a summary of the DTQ system developed by Tyndall.

The second pdf is the full report on the DTQ system developed by Tyndall.

This is a draft Document that I wrote over June 2007 synthesizing a
broad range of material surrounding climate policy in an attempt to
create a broad vision framework for building a radically different
world resiliant enough to perservere through global warming and do it
right.