It is, after all, only common sense to realize that, but for the fact that economic life is a process of incessant internal change, the business cycle, as we know it, would not exist.
Joseph A. SchumpeterThe state has been living on a revenue which was being produced in the private sphere for private purposes and had to be deflected from these purposes by political force. The theory that construes taxes on the analogy of club dues or of the purchase of the services of, say, a doctor only proves how far removed this part of the social sciences is from scientific habits of mind.
Joseph A. SchumpeterAll we can thus far say about the duration of the units of [the business cycle] and each of [its] two phases is that it will depend on the nature of the particular innovations that carry a cycle,... and the financial conditions and habits prevailing in the business community in each case.
Joseph A. SchumpeterThe function of entrepreneurs is to reform or revolutionize the pattern of production by exploiting an invention or, more generally, an untried technological possibility for producing a new commodity or producing an old one in a new way, by opening up a new source of supply of materials or a new outlet for products, by reorganizing an industry and so on.
Joseph A. Schumpeter