Crises, depressions, hard times, dull times, brisk times, periods of speculative advance, "eras of prosperity," are primarily phenomena of business; they are, in their origin and primary incidence, phenomena of price disturbance, either of decline or advance. It is only secondarily, through the mediation of business traffic, that these matters involve the industrial process or the livelihood of the community. They affect industry because industry is managed on a business footing, in terms of price and for the sake of profits. So long as business enterprise habitually ran its course within commercial traffic proper, apart from the industrial process as such, so long these recurring periods of depression and exaltation began and ended within the domain of commerce.(3*) The greatest field for business profits is now afforded, not by commercial traffic in the stricter sense, but by the industries engaged in producing goods and services for the market. And the close-knit, far-reaching articulation of the industrial processes in a balanced system, in which the interstitial adjustments are made and kept in terms of price, enables price disturbances to be transmitted throughout the industrial community with such celerity and effect that a wave of depression or exaltation passes over the whole community and touches every class employed in industry within a few weeks. And somewhat in the same measure as the several modern industrial peoples are bound together by the business ties of the world market, do these peoples also share in common any wave of prosperity or depression which may initially fall upon any one member of this business community of nations. Exceptions from this rule, of course, are such periods of prosperity or depression as result from local (material) accidents of the seasons and the like, - accidents that may inflict upon one community hardships which through the mediation of prices are transmuted into gain for the other communities that are not touched by the calamitous act of God to which the disturbance is due.

The true, or what may be called the normal, crises, depressions, and exaltations in the business world are not the result of accidents, such as the failure of a crop. They come in the regular course of business. The depression and the exaltation are in a measure bound together. In the recent past, since depression and exaltation have been normal features of the situation, every strongly marked period of exaltation (prosperity) has had its attendant period of depression; although it does not seem to follow in the nature of things that a wave of depression necessarily has its attendant reaction in the way of a period of business exaltation. In the recent past - the last twenty years or so - it has been by no means anomalous to have a period of hard times, or even a fairly pronounced crisis, without a wave of marked exaltation either preceding or following it in such close sequence as conveniently to connect the two as action and reaction. But it would be a matter of some perplexity to a student of this class of phenomena to come upon a wave of marked business exaltation (prosperity) that was not promptly followed by a crisis or by a period of depression more or less pronounced and prolonged. Indeed, as the organization of business has approached more and more nearly to the relatively consummate situation of to-day, - say during the last twenty years of the nineteenth century, - periods of exaltation have, on the whole, grown less pronounced and less frequent, whereas periods of depression or "hard times" have grown more frequent and prolonged, if not more pronounced. It might even be a tenable generalization, though perhaps unnecessarily broad, to say that for a couple of decades past the normal condition of industrial business has been a mild but chronic state of depression, and that any marked departure from commonplace dull times has attracted attention as a particular case calling for a particular explanation. The causes which have given rise to any one of the more pronounced intervals of prosperity during the past two decades are commonly not very difficult to trace; but it would be a bootless quest to go out in search of special causes to which to trace back each of the several periods of dull times that account for the greater portion of the past quarter of a century. Under the more fully developed business system as it has stood during the close of the century dull times are, in a way, the course of nature; whereas brisk times are an exceptional invention of man or a rare bounty of Providence.

...

It will be noted that the explanation here offered of depression makes it a malady of the affections. The discrepancy which discourages business men is a discrepancy between that nominal capitalization which they have set their hearts upon through habituation in the immediate past and that actual capitalizable value of their property which its current earning-capacity will warrant. But where the preconceptions of the business men engaged have, as commonly happens, in great part been fixed and legalized in the form of interest-bearing securities, this malady of the affections becomes extremely difficult to remedy, even though it be true that these legalized affections, preconceptions, or what not, centre upon the metaphysical stability of the money unit.

(Veblen's _Theory of Business Enterprise_ Chapter 7, The Theory of Modern Welfare; e-text)

The brainless should not be in banking -- Willem Buiter