I think we look at each transaction on a case-by-case basis. We generally look at 250 merger transactions across all industries in the run of a year, so we are guided by what the competitive dynamics are in the particular industry based on the evidence that we obtain from suppliers, competitors, and customers in the marketplace.
Generally our guidelines would say that it is a forward-looking exercise. We're trying to predict what the competition will look like after that merger transaction takes place. In some cases, it may be that we're looking at a sustained price increase over a few months. It could be that in some industries we're looking at a few years. It really is guided by the particular facts of a particular case in a particular industry, and we're looking at it on a transaction-by-transaction basis.