The advantage of using a simple heuristic to mine the price/quantity data directly is that you don't have to conduct a large, expensive survey every ten years or so to group sectors into fixprice and flexprice.

Incidentally, can you point me in the direction of some of the literature on those studies? And do you know whether price/quantity data exists in digital that far back? It would certainly help avoid the most common model-making traps if we could test the models on real historical data before letting it loose on contemporary data...

- Jake

Friends come and go. Enemies accumulate.