Yes, I can, Mr. Laframboise.
It manifests itself in a number of ways, but I think the simplest way to start describing it is to say there are certain parts of the country where there is only one railway option, and a couple of places come to mind. In the Atlantic provinces, for example, CP has largely withdrawn from anything east of Montreal, so from Montreal through to the port of Halifax, and in New Brunswick and so on, the only viable rail option is Canadian National. The same is true in northern British Columbia since CN bought the British Columbia Railway. There are other places--southwestern British Columbia, the coal areas, where Canadian Pacific is the only game in town.
The reason we've used this term “dual monopoly”, as opposed to “duopoly”, is that there are places where there is no competition between the two companies. And some of the other practices they follow are ones that one would expect to see from a monopoly supplier, in terms of a certain arbitrary approach to the kind of service they'll offer.
An anecdotal situation: One of the companies in our membership, the Canadian Industrial Transportation Association, was receiving seven switches a week, one a day, at their plant, and this was in Montreal. The railway involved arbitrarily said, I think with a day's, or two days', advance notice, they were not going to serve them seven days a week any more, they were only going to serve them five days a week.
So that's the kind of thing....