scholarly journals On the Unsustainable Macroeconomy with Increasing Inequality of Firms Induced by Excessive Liquidity

2019 ◽  
Vol 11 (11) ◽  
pp. 3075
Author(s):  
Wenzhi Zheng ◽  
Yuting Lou ◽  
Yu Chen

This research studies how excessive liquidity can trigger catastrophic economic crises in a stylized macroeconomic agent-based model (ABM). Previous studies showed the relevance of the income distribution to the economic crises, whereas we find, in a well-studied macroeconomic ABM endowed with diverse economic performance of firms, while providing moderate liquidity serves as an effective tool to stabilize the economy, excessive liquidity may cause abnormal dispersion of firm’s wealth and the subsequent severe endogenous crises. The mechanism for such large-scale crises is found in the model as the increasing gap of financial fagility between the advantageous and disadvantageous groups of firms. Two factors, diverse production cycles and variable wages, are used to explore the robustness of the occurrence of crises. Moreover, our study shows that the leverage ratio based on aggregate values may underestimate the systemic risk. Hence, a proposal for the new design of the risk measurement in the macro-economy and insights into monetary policies for a sustainable economic development is given.

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Jingqian Tian ◽  
Chao Wang ◽  
Xiaoxing Liu ◽  
Longmiao Qiu

An agent-based model is proposed, constructing an evolutionary banking system, where interbank loans and investment strategies are, respectively, determined by liquidity shortage and utility maximization. The causes of systemic risk are then explored based on the evolutionary banking system, which is calibrated by a sample from China. The regulatory interventions indicate the positive effects of increased investment assets, while the negative but inappreciable effects of increased interbank counterparties on contagion risks decrease. This observation hints at the possibility of promoting systemic stability by incentivizing more diversifications in investment assets instead of interbank counterparties. The results also demonstrate the advantages of prudential liquidity requirements, interbank liquidity facilities, and monetary policies from the central bank in promoting banking system stability.


Author(s):  
Na Li ◽  
Baofeng Jiao ◽  
Lingkun Ran ◽  
Zongting Gao ◽  
Shouting Gao

AbstractWe investigated the influence of upstream terrain on the formation of a cold frontal snowband in Northeast China. We conducted numerical sensitivity experiments that gradually removed the upstream terrain and compared the results with a control experiment. Our results indicate a clear negative effect of upstream terrain on the formation of snowbands, especially over large-scale terrain. By thoroughly examining the ingredients necessary for snowfall (instability, lifting and moisture), we found that the release of mid-level conditional instability, followed by the release of low-level or near surface instabilities (inertial instability, conditional instability or conditional symmetrical instability), contributed to formation of the snowband in both experiments. The lifting required for the release of these instabilities was mainly a result of frontogenetic forcing and upper gravity waves. However, the snowband in the control experiment developed later and was weaker than that in the experiment without upstream terrain. Two factors contributed to this negative topographic effect: (1) the mountain gravity waves over the upstream terrain, which perturbed the frontogenetic circulation by rapidly changing the vertical motion and therefore did not favor the release of instabilities in the absence of persistent ascending motion; and (2) the decrease in the supply of moisture as a result of blocking of the upstream terrain, which changed both the moisture and instability structures leeward of the mountains. A conceptual model is presented that shows the effects of the instabilities and lifting on the development of cold frontal snowbands in downstream mountains.


2021 ◽  
Author(s):  
Marina Brogi ◽  
Valentina Lagasio ◽  
Luca Riccetti

AbstractThe general consensus on the need to enhance the resilience of the financial system has led to the imposition of higher capital requirements for certain institutions, supposedly based on their contribution to systemic risk. Global Systemically Important Banks (G-SIBs) are divided into buckets based on their required additional capital buffers ranging from 1% to 3.5%. We measure the marginal contribution to systemic risk of 26 G-SIBs using the Distressed Insurance Premium methodology proposed by Huang et al. (J Bank Financ 33:2036–2049, 2009) and examine ranking consistency with that using the SRISK of Acharya et al. (Am Econ Rev 102:59–64, 2012). We then compare the bucketing using the two academic approaches and supervisory buckets. Because it leads to capital surcharges, bucketing should be consistent, irrespective of methodology. Instead, discrepancies in the allocation between buckets emerge and this suggests the complementary use of other methodologies.


Author(s):  
Lucas Meyer de Freitas ◽  
Oliver Schuemperlin ◽  
Milos Balac ◽  
Francesco Ciari

This paper shows an application of the multiagent, activity-based transport simulation MATSim to evaluate equity effects of a congestion charging scheme. A cordon pricing scheme was set up for a scenario of the city of Zurich, Switzerland, to conduct such an analysis. Equity is one of the most important barriers toward the implementation of a congestion charging system. After the challenges posed by equity evaluations are examined, it is shown that agent-based simulations with heterogeneous values of time allow for an increased level of detail in such evaluations. Such detail is achieved through a high level of disaggregation and with a 24-h simulation period. An important difference from traditional large-scale models is the low degree of correlation between travel time savings and welfare change. While traditional equity analysis is based on travel time savings, MATSim shows that choice dimensions not included in traditional models, such as departure time changes, can also play an important role in equity effects. The analysis of the results in light of evidence from the literature shows that agent-based models are a promising tool to conduct more complete equity evaluations not only of congestion charges but also of transport policies in general.


2018 ◽  
Vol 35 (7) ◽  
pp. 676-687 ◽  
Author(s):  
Ibtissame Abaidi ◽  
Eric Vernette

PurposeThe internet has made it possible to diffuse totally digitized products on a very large scale. The newspaper business is one of the sectors that has been most affected by this technological revolution. Given such products’ uneven commercial success, an analysis of the literature suggests that these mixed results could be explained by the digitized nature of the product combined with a price judged too high. Both these elements reduce the perceived global value of the digital support compared with the print version on paper. To test this proposition, the authors have constructed an experimental design, manipulating the format (digital newspaper vs. print newspaper) and the price (high vs low). The results show that newspaper digitization significantly reduces perceived global value for the consumer compared with the print format. The authors also show that the perceived intangibility of the product exerts a more complex effect on perceived global value: this effect depends on both the nature of the intangibility (mental vs physical) and the cost and benefit analysis.Design/methodology/approachAn experimental study was conducted with two factors: digitalization (print vs digital format) and price (low vs high). The authors carried out a mixed-factor variance analysis and follow Preacher and Hayes procedure to test the hypothesis. A sample of 387 undergraduate students was interviewed in laboratory.FindingsThe results show that newspaper digitization significantly reduces (i.e. destroys) perceived global value for the consumer (i.e. it destroys value), compared to the print format. The reuslts also show that the perceived intangibility of the product exerts a more complex effect on perceived global value: this effect depends at the same time on the nature of the intangibility (mental vs physical) and the account taken of costs and benefits.Originality/valueOne major result is the fact that digitizing newspaper strongly destroys its perceived global value for the consumer, compared to the physical alternative. To explain this phenomenon, the product’s perceived intangibility had been considered, as well as how this is related to the perceived costs and benefits. It appears that it has an overall direct negative effect on perceived value; therefore, the more a newspaper format is perceived as physically intangible, the more its perceived global value decreases. Results shows that this loss of value can be counteracted in two different ways, through the indirect effects of costs and benefits.


Author(s):  
Zhixin Tie ◽  
David Ko ◽  
Harry H. Cheng

Mobile agent technology has become an important approach for the design and development of distributed systems. However, there is little research regarding the monitoring of computer resources and usage at large scale distributed computer centers. This paper presents a mobile agent-based system called the Mobile Agent Based Computer Monitoring System (MABCMS) that supports the dynamic sending and executing of control command, dynamic data exchange, and dynamic deployment of mobile code in C/C++. Based on the Mobile-C library, agents can call low level functions in binary dynamic or static libraries, and thus can monitor computer resources and usage conveniently and efficiently. Two experimental applications have been designed using the MABCMS. The experiments were conducted in a university computer center with hundreds of computer workstations and 15 server machines. The first experiment uses the MABCMS to detect improper usage of the computer workstations, such as playing computer games. The second experimental application uses the MABCMS to detect system resources such as available hard disk space. The experiments show that the mobile agent based monitoring system is an effective method for detecting and interacting with students playing computer games and a practical way to monitor computer resources in large scale distributed computer centers.


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