It seems pretty clear, however, that on the whole, despite occasional suggestions that his theory is abstract, Fisher means his theory to be the overwhelmingly important point in the explanation of actual price-levels. He is particularly insistent on the high degree of the generality of his contention that P is passive. Thus: "So far as I can discover, _except to a_ LIMITED _extent during transition periods, or during a passing season_, (_e. g._, _the fall_) (capitals mine, italics Fisher's), there is no truth whatever in the idea that the price-level is an independent cause of changes in any of the other magnitudes, M, M', V, V', or the Q's."[189] On p. 182 he enumerates in a series of propositions his general normal theory, and adds, as the first sentence of proposition 9: "Some of the foregoing propositions _are subject to_ SLIGHT _modification during transition periods_." (Italics and capitals mine.) And the general drift of the argument, particularly in chapter 8, where the heart of Fisher's causal theory is presented, would indicate that the concessions he is disposed to make are very slight, indeed. The question as to how long a _time_ is required, in Fisher's view, for a transition to occur, and for his normal tendencies to dominate, is nowhere made clear. The quantity theory, in the hands of some writers, is a very long run theory, for others, it is a short run theory. Thus, Taussig would make the "run" exceedingly long.[190] Mill makes it a short run theory. "It is not, however, with ultimate or average, but with immediate and temporary prices, that we are now concerned. These, as we have seen, may deviate widely from the standard of cost of production. Among other causes of fluctuation, one we have found to be, the quantity of money in circulation. Other things being the same, an increase of the money in circulation raises prices, a diminution lowers them. If more money is thrown into circulation than the quantity which can circulate at a value conformable to its cost of production, the value of money, so long as the excess lasts, will remain below the standard of cost of production, and general prices will be sustained above the natural rate."[191] I pause to note that it is really strange that a single name should describe theories so different, resting on such essentially different logic. Long run or short run theories, all are "quantity theories," whether "money" be defined as gold, or as all manner of media of exchange, or as only those media of exchange which pass from hand to hand without endorsement. Fisher would doubtless call his theory a long run theory. From the standpoint of the notion that "prices ... lag behind their full adjustment and have to be pushed up, so to speak, by increased purchases,"[192] however, we get a short run quantity theory doctrine. The logic of these two is very different. The short run doctrine seeks to explain the actual process of price-making in the market.