Complete consistency is the luxury of theorists. In practice, sadly, there are such things as history and path dependency. The early developers of the national accounts did not anticipate the vast almost of practical work that would be based on them. If we had it to do over again, we would do it differently. But as it is, we must live with history, and try to be as close as possible to what we NOW need. So the accounts measure mainly market transactions, but not (sadly) exclusively. We do not want to mix them up any further with non-market transactions and so use an elaborate set of satellite accounts to measure many other things that are of great interest. In any case, it is the decision of the National Accounts Division of Statistics Canada that I was referring to not mine--although what has been done is what I and others advised. Richard G. Lipsey