Abstract: A method of assigning a settled unit capacity price for the purchase of transmission capacity by resource suppliers including the steps of specifying an available capacity for bidding, receiving bids from a plurality of resource suppliers, selecting the bids with the highest personal unit capacity prices until the aggregate desired capacity of the selected bids at least equals the available capacity or until all the bids have been selected if the aggregate desired capacity does not at least equal the available capacity, and assigning the settled unit capacity price to be a function of the personal unit capacity prices submitted in the selected bids. In some examples, the method includes allocating transmission capacity to resource suppliers. In some examples, the method includes assigning a settled net unit capacity price for each of different term durations and allocating transmission capacity to resource suppliers.