The limit distributions of growth rate fluctuation of complex systems: An application to business firms

This paper aims to explore the interactions between macroeconomic conditions, such as: real GDP growth rate, inflation rate, market interest rate, broad money supply, foreign exchange rate fluctuation and unemployment rate, and credit risk in Romanian banking sector during 2008-2013. The interrelations of indicators’ complexity imply a multidimensional statistical analysis in order to find a relation between the macroeconomic conditions and the credit risk. Our regression analysis findings confirm the hypothesis according to which the money supply growth rate and the market foreign exchange rate are negatively related with credit risk and the unemployment rate is positively related with it. Furthermore, our findings revealed that the credit risk is significantly and negatively affected by the exchange rate fluctuation and significantly and positively affected by the unemployment rate. The results do not indicate a significant relationship between credit risk and real GDP growth rate.

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Generalised Central Limit Theorems for Growth Rate Distribution of Complex Systems

Journal of Statistical Physics ◽

10.1007/s10955-014-0956-4 ◽

2014 ◽

Vol 155 (1) ◽

pp. 47-71 ◽

Cited By ~ 11

Author(s):

Misako Takayasu ◽

Hayafumi Watanabe ◽

Hideki Takayasu

Keyword(s):

Growth Rate ◽

Complex Systems ◽

Central Limit ◽

Limit Theorems ◽

Central Limit Theorems ◽

Rate Distribution ◽

Growth Rate Distribution

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The threshold energy for atom displacement in fcc metals

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100175788 ◽

1990 ◽

Vol 48 (4) ◽

pp. 530-531

Author(s):

Wilfried Sigle ◽

Matthias Hohenstein ◽

Alfred Seeger

Keyword(s):

Growth Rate ◽

Elevated Temperatures ◽

Threshold Energy ◽

Dislocation Loops ◽

Absolute Minimum ◽

Voltage Electron ◽

Atom Displacement ◽

Electron Microscopes ◽

Fcc Metal

Prolonged electron irradiation of metals at elevated temperatures usually leads to the formation of large interstitial-type dislocation loops. The growth rate of the loops is proportional to the total cross-section for atom displacement,which is implicitly connected with the threshold energy for atom displacement, Ed . Thus, by measuring the growth rate as a function of the electron energy and the orientation of the specimen with respect to the electron beam, the anisotropy of Ed can be determined rather precisely. We have performed such experiments in situ in high-voltage electron microscopes on Ag and Au at 473K as a function of the orientation and on Au as a function of temperature at several fixed orientations.Whereas in Ag minima of Ed are found close to <100>,<110>, and <210> (13-18eV), (Fig.1) atom displacement in Au requires least energy along <100>(15-19eV) (Fig.2). Au is thus the first fcc metal in which the absolute minimum of the threshold energy has been established not to lie in or close to the <110> direction.

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