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Theory of Zipf's Law and Beyond / by Alex Saichev, Yannick Malevergne, Didier Sornette
Contributor(s): Resource type: Ressourcentyp: Buch (Online)Book (Online)Language: English Series: SpringerLink Bücher | Lecture notes in economics and mathematical systems ; 632Publisher: Berlin, Heidelberg : Springer-Verlag Berlin Heidelberg, 2010Description: Online-Ressource (XII, 171p. 44 illus, digital)ISBN:- 9783642029462
- Statistische Verteilung
- Unternehmenserfolg
- Markteintritt
- Marktaustritt
- Betriebsgrößenstruktur
- Theorie
- Unternehmensgröße
- Unternehmenswachstum
- Zipfsches Gesetz
- Unternehmensgründung
- Unternehmensliquidation
- Gibratś law
- Economics/Management Science
- Macroeconomics
- Economic theory
- Distribution (Probability theory)
- Economics
- Economics, Mathematical
- Finance
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- 339 23
- 338.710151
- 330.91732
- HG1-9999
- HB172.5
- HT321
Contents:
Summary: Continuous Gibrat#x2019;s Law and Gabaix#x2019;s Derivation of Zipf#x2019;s Law -- Flow of Firm Creation -- Useful Properties of Realizations of the Geometric Brownian Motion -- Exit or #x201C;Death#x201D; of Firms -- Deviations from Gibrat#x2019;s Law and Implications for Generalized Zipf#x2019;s Laws -- Firm#x2019;s Sudden Deaths -- Non-stationary Mean Birth Rate -- Properties of the Realization Dependent Distribution of Firm Sizes -- Future Directions and ConclusionsSummary: Zipf's law is one of the few quantitative reproducible regularities found in economics. It states that, for most countries, the size distributions of city sizes and of firms are power laws with a specific exponent: the number of cities and of firms with sizes greater than S is inversely proportional to S. Zipf's law also holds in many other scientific fields. Most explanations start with Gibrat's law of proportional growth (also known as "preferential attachment'' in the application to network growth) but need to incorporate additional constraints and ingredients introducing deviations from it. This book presents a general theoretical derivation of Zipf's law, providing a synthesis and extension of previous approaches. The general theory is presented in the language of firm dynamics for the sake of convenience but applies to many other systems. It takes into account (i) time-varying firm creation, (ii) firm's exit resulting from both a lack of sufficient capital and sudden external shocks, (iii) the coupling between firm's birth rate and the growth of the value of the population of firms. The robustness of Zipf's law is understood from the approximate validity of a general balance condition. A classification of the mechanisms responsible for deviations from Zipf's law is also offeredPPN: PPN: 1648809669Package identifier: Produktsigel: ZDB-2-SBE
Theory of Zipf's Law and Beyond; 1 Introduction; 2 Continuous Gibrat's Law and Gabaix's Derivationof Zipf's Law; 3 Flow of Firm Creation; 4 Useful Properties of Realizations of the Geometric Brownian Motion; 5 Exit or ``Death'' of Firms; 6 Deviations from Gibrat's Lawand Implications for Generalized Zipf's Laws; 7 Firm's Sudden Deaths; 8 Non-stationary Mean Birth Rate; 9 Properties of the Realization Dependent Distribution of Firm Sizes; 10 Future Directions and Conclusions; References; Index
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