The results validate the modeling choices in several ways. The distribution of gasoline sales within the market is shown to be poorly correlated with the distribution of local population, and significantly more so with the distribution of work commuters. This directly translates into a small and positive estimate of the transportation cost parameter in the traditional model, which implies very little spatial differentiation. Since the degree of sustainability between locations feeds directly into predictions of mark-ups and prices, the results from the multi-address model differ sharply in terms of the evaluation of market power. Importantly, the estimated markups coming from the model match very well the observed profit margins over the spot wholesale price for gasoline.