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This paper has been withdrawn, because its material has been revised and became part of paper math.GT/0010184

This paper has been withdrawn by the author due to the presented idea is wrong.

This paper has been withdrawn by the authors, because it has been made obsolete by the detailed expositions in our papers in arXiv:0812.4885 (the mathematics part) and arXiv:0812.4737 (the economics part).

This paper has been withdrawn by the authors. Because of a misunderstanding, the paper was submitted prematurely to the arXiv. A replacement will follow.

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The paper presents a counterexample to the Hodge conjecture.

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This paper has been withdrawn because Proposition 2.2 (c) is false. This invalids the main results of section 2 and 3. We thank A. Canonaco for pointing us the error.

This paper has been withdrawn by the author, due a crucial error in the main idea.

This paper has been withdrawn by the author due to errors and bad formalization.

This paper has been withdrawn by the author [arXiv admin].

WITHDRAWAL NOTICE This paper has been withdrawn by the authors as required by the American Journal of Sociology, which has accepted the paper for publication. AJS will not publish papers if the preprint remains posted on arXiv.

This document contains a description of several of my papers, including remarks on history and connection with subsequent work. It also contains some new results and conjectures.