Perceived Information Revisited

Common information revisited

One of the main notions of information theory is the notion of mutual information in two messages (two random variables in Shannon information theory or two binary strings in algorithmic information theory). The mutual information in x and y measures how much the transmission of x can be simplified if both the sender and the recipient know y in advance. Gács and Körner gave an example where mut...

Information Technology Substitution Revisited

Taking advantage of the opportunities created by the price adjusted performance improvement in IT depends in part on the ability of IT capital to substitute for other inputs in production. Studies in the IS literature as well as most economics training that examine substitution of IT capital for other inputs use the Allen elasticity of substitution (AES). We present a less-well-known measure fo...

Information Packaging Revisited

Information Systems Success Revisited

The DeLone & McLean IS Success Model has become a standard for the specification and justification of the measurement of the dependent variable in information systems research. Attempts to apply and test the model have resulted in both confirmation and challenges. This paper reviews and analyzes over 150 articles which have referenced the model over the past eight years in order to examine what...

Information projections revisited

The goal of this paper is to complete results available about -projections, reverse -projections, and their generalized versions, with focus on linear and exponential families. Pythagorean-like identities and inequalities are revisited and generalized, and generalized maximum-likelihood (ML) estimates for exponential families are introduced. The main tool is a new concept of extension of expone...