With the Internet and the spread of the information and communication technologies (ITCs), one noticed the emergence (especially in the United States of America) of the concept of a "Net-economy", as well as the one, broader, of a "new economy". Their advocates argue that we would have entered a new era, characterized by a technological and economic paradigm that would be totally different from the former.
Frédéric Teulon first indicates what this concept of a "new economy" means, and explains how the idea could emerge that the growth of the ITCs -as well as those of the rail in the XIXth century and of the electricity and the car in the XXth - can signify a new era. The author wonders how it could denote that we would be now at the beginning of a new upswing in the Kondratieff cycle. In this regard, he points out the effective improvements accomplished, despite the delay justifying Solow's paradox -computers can be seen everywhere except in the productivity rate- and due to the deep restructuring of the American productive system.
But, even if technological innovation is patent and if information now represents the main factor of wealth, it does not necessarily mean that the past economic rules are outdated. Frédéric Teulon, through various examples, demonstrates that on the contrary these remain really relevant: the ITCs do not imply the end of the big firm, of the market economy (vs. economy of the free), of integration, of the risk of inflation...
It is important not to be deluded by the takeoff of the Nasdaq -Nasdaq which has lost half its value since March 2000... Many start-ups will be bankrupt... All this is normal: the "new economy" functions in the same way as the old; if technical improvement permitted growth, the fact remains that the problematic of development is much more complex than what is explained by those who want to present a univocal answer. Economic, fiscal and monetary policies, for instance, remain as far important.