In the modern literature on game theory there are several versions of what is known as Zermelo's theorem. It is shown that most of these modern statements of Zermelo's theorem bear only a partial relationship to what Zermelo really did. We also give a short survey and discussion of the closely related but almost unknown work by König and Kálmar. Their papers extend and considerably generalize Zermelo's approach. A translation of Zermelo's paper is included in the appendix.

This paper explores the debates surrounding whether or not we have now moved into a new knowledge economy and/or knowledge society and if so whether this shift is as significant and as far reaching as the industrial revolution. In this possible transformation the place of information communications technologies has been crucial. Debate has occurred across both economics and sociology with differing emphases as is shown in the ranges of definitions that we review in the paper. One consistent factor is the lack of clarity and consistency between them both within and across the disciplines. In order to explore the issues that the debates raises in a more grounded way, the paper explores them in relation to intellectual property (IP) and the intellectual commons in the process of innovation, growth and economic development. The paper is developed through an analysis first of the industrial revolution and the role within this of uncertainty, technologies, complementarities and elective affinities and the way IP was protected and controlled through patents, secrecy, being first to the market and copyright. The second part of the paper examines definitions of the knowledge economy and society and the role within these of information communication technologies in order to explore whether the ways that IP is protected and controlled have changed. In the debate about the 'knowledge economy and society' the role of innovation via human capital with a greater reliance on intellectual capabilities has been emphasized. The role of IP thus remains central but is now challenged by the rise of new forms of communication, which make its protection harder and move much of the concern with respect to regulation to a global rather than national and local level.

This survey gives an overview of the theory of the firm as it is formulated within the contemporary ‘mainstream’ of economics. Two groupings of theories are briefly discussed: principal–agent and incomplete contract models. Next, three of the most recent contributions regarding firms are considered. The reference point approach is looked at first followed by a discussion of Spulber's book The Theory of the Firm. Last, we consider the entrepreneurial judgement perspective.

This paper argues that the mainstream approaches to the theory of the firm do not provide a theory of the human capital‐based or knowledge firm. We examine the neoclassical theory of the firm, the transaction cost model, the incentive‐system approach and the Grossman Hart Moore approach and argue that none of them is able to fully capture the changes to the firm that the movement towards a knowledge economy entails. We also consider the effects of knowledge on the organisation of production. Will production take place within a single large factory, or several smaller factories or even within households?

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