This paper describes two schemes that combine JPEG and Segmented Image Coding (SIC) for progressive image transmission. Compared to JPEG-based progressive transmission schemes, the new schemes produce reconstructed images of better quality during all the stages of transmission and never transmit more bits. Also, the computational complexity of the new schemes is lower than that of the SIC-only ...

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This review considers conceptual issues underlying empirical work on markets. It is divided in three parts. The first part reviews the analysis of demand and equilibrium retail markets then recent advances that require different assumptions: where adverse selection moral hazard may be important, vertical with bargaining, wherein a centralized allocation mechanism replaces prices. second cost pr...

This essay provides a brief overview of the evolution of the field of industrial organization from its emergence to the present, and it offers some observations about the present state of the field. While there has been considerable progress in industrial organization over time, its uphill path has not been straight.

Clustering and correlation effects are frequently observed in chaotic systems in situations where, because of the positivity of the Lyapunov exponents, no dimension reduction is to be expected. In this paper, using a globally coupled network of Bernoulli units, one finds a general mechanism by which strong correlations and slow structures are obtained at the synchronization edge. A structure in...

It is ascertained that the theorem of proportionality, which maintains that replacement investment is a constant proportion of the outstanding capital stock, has several fundamental shortcomings. It derives from a model founded on assumptions that are highly restrictive and unlikely to hold in reality. It is alien to the thinking of researchers in industrial organization and other neighboring f...

How an organization handles uncertainties stemming from its own production processes and from its environment, is a central characteristic of its functioning. Many organizations, foremost those which have to handle substantial health and safety risks, aim at minimizing uncertainties. This is in contrast with newer organization theory which argues for enabling local competence for coping with un...