There are no direct studies that I am aware of at this time. The information we usually get comes in real time. It's hard to study something that's not consistent. If there's a shortage of one product or another, nobody is going to be complaining because a price is high. That's going to be in demand in the United States and Canada or wherever it goes.
If there's a very good crop year and we have fewer exports because the Americans have had a very good crop year, that's when the issues start to come up. We never know when it's going to happen. It happens at a moment's notice, depending on the year. It could be something that happens for three weeks or two months and that could depress a market.
But to do a five-year study or a three-year study...? It's really going to be hard to pinpoint what happens, because for a lot of that time things are happening in real time.