Yougui Wang

Yougui Wang
Beijing Normal University | bnu · School of Systems Science

Ph.D

About

128
Publications
34,333
Reads
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1,420
Citations
Citations since 2016
31 Research Items
820 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
Introduction
Additional affiliations
June 2013 - present
Beijing Normal University
Position
  • Professor (Full)
September 2006 - August 2007
Boston University
Position
  • Professor
November 1999 - May 2013
Beijing Normal University
Position
  • Professor (Full)

Publications

Publications (128)
Article
In scientific research, collaboration is one of the most effective ways to take advantage of new ideas, skills, and resources and for performing interdisciplinary research. Although collaboration networks have been intensively studied, the question of how individual scientists choose collaborators to study a new research topic remains almost unexpl...
Preprint
In scientific research, collaboration is one of the most effective ways to take advantage of new ideas, skills, resources, and for performing interdisciplinary research. Although collaboration networks have been intensively studied, the question of how individual scientists choose collaborators to study a new research topic remains almost unexplore...
Article
The Basel-III accord introduced multiple prudential regulations, sparking concerns that their simultaneous imposition may have unexpected effects on bank lending and its response to monetary shocks. This paper reformulates the bank lending channel (BLC) from a credit creation perspective and examines its changes under different prudential regulatio...
Article
This paper presents an agent-based model consisting of multiple households, multiple firms, one commercial bank and one central bank, with the aim of demonstrating loan defaults drive business cycles via credit creation. The simulations show us explicit patterns of cycles for some key variables and possible underlying mechanisms are proposed. We co...
Article
Full-text available
Teamwork is one of the most prominent features in modern science. It is now well understood that team size is an important factor that affects the creativity of the team. However, the crucial question of how the character of research studies is related to the freshness of a team remains unclear. Here, we quantify the team freshness according to the...
Article
Full-text available
Despite persistent efforts in understanding the motives and patterns of human migration behaviors, little is known about the microscopic mechanism that drives migration and its association with migrant types. To fill the gap, we develop a population game model in which migrants are allowed to be heterogeneous and decide interactively on their desti...
Preprint
Teamwork is one of the most prominent features in modern science. It is now well-understood that the team size is an important factor that affects team creativity. However, the crucial question of how the character of research studies is influenced by the freshness of the team remains unclear. In this paper, we quantify the team freshness according...
Article
We develop a stock-flow consistent model to describe a macroeconomic system consisting of households, firms, the government, the central bank, and banks. The framework is based on the balance sheets of all sectors, in which the monetary flows between them govern the dynamics of the items. The whole system evolves over time and eventually attains a...
Article
With the purpose of performing a simple and original analysis on the mechanisms through which money and debt affect aggregate demand, this paper presents a stock-flow-consistent model in which the role of credit creation of banks is emphasized. By conducting theoretical analysis on income determination in an alternative way, we demonstrate that the...
Article
Rank mobility, which was designed to measure the average variation of relative rank positions with respect to any absolute variable over a given time period, can be used to explore how the memory of stock price ranking orders fades over time. We investigate the variation in rank order of the closing prices of stocks registered at the Shanghai A-sha...
Article
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Since the recent financial crisis along with more concentration of banking supervision, we have stepped into a new regulatory regime where multiple regulations are at play simultaneously. In this paper, we study the collective impacts of multiple regulations on credit creation in a heterogeneous banking system. Each single regulation imposes a cons...
Article
Full-text available
Despite persistent efforts in understanding the creativity of scientists over different career stages, little is known about the underlying dynamics of research topic switching that drives innovation. Here, we analyze the publication records of individual scientists, aiming to quantify their topic switching dynamics and its influence. We find that...
Article
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Objective We propose an index to characterize the key feature of Chinese surname distributions and investigate its implications for population structure and dynamics. Materials and methods The surname dataset was obtained from the National Citizen Identity Information Center, which contains 1.28 billion Chinese citizens enrolled in 2007, excluding...
Article
The fractional reserve theory of money creation only considers the reserve requirement but ignores prudential regulations. We study the impacts of four prudential regulations under the Basel III framework on the commercial bank's ability to create money. Using a balance sheet approach, we formulate the corresponding maximum money multiplier under e...
Article
The fluctuations of international crude oil markets have caused significant attention around the world and aroused strong interest in the forecasting of the systemic risk in crude oil trade. Based on the oil imported values data of 34 major oil-importing countries from January 2005 to June 2017, we calculate the cross-correlation functions of time...
Preprint
We analyze the publication records of individual scientists, aiming to quantify the topic switching dynamics of scientists and its influence. For each scientist, the relations among her publications are characterized via shared references. We find that the co-citing network of the papers of a scientist exhibits a clear community structure where eac...
Article
Full-text available
Increasing gap in wealth distribution is among the key issues that have been discussed worldwide in recent years. In this paper, we use the money transfer model to explain the formation of wealth distribution, by imposing two types of debt constraints, and the analytic function of wealth distribution is derived by adopting Boltzmann statistics. Wit...
Article
We use isonymic distance to measure the dissimilarity in surname structure between populations of Chinese provinces, and we employ the minimum spanning tree (MST) and the single linkage cluster analysis (SLCA) to investigate the hierarchical structure of Chinese provinces and present its corresponding geographical features. We find diverse discrepa...
Article
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Objective We investigate surname affinities among areas of modern‐day China, by constructing a spatial network, and making community detection. It reports a geographical genealogy of the Chinese population that is result of population origins, historical migrations, and societal evolutions. Materials and methods We acquire data from the census rec...
Article
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Inspired by the extensive criticisms against the textbook fractional reserve theory, this paper revisits the mechanics of money creation process and complements the traditional focus on the reserve requirement by elaborating on the roles of three prudential regulations proposed in the Basel III accord. In particular, the authors consider such condi...
Article
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The science of science (SOS) is a rapidly developing field which aims to understand, quantify and predict scientific research and the resulting outcomes. The problem is essentially related to almost all scientific disciplines and thus has attracted attention of scholars from different backgrounds. Progress on SOS will lead to better solutions for m...
Article
With personal annual income data of 5 consecutive years (1998–2002) from CHIPS, dynamic characteristics of Chinese income are studied, especially two hypotheses of time reversal symmetry and independent growth rate are tested. In high income regions, an increasing trend of the standard deviation of income growth rate is observed, which means indepe...
Article
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The properties of q-dependent cross-correlation matrices of stock market have been analyzed by using the random matrix theory and complex network. The correlation structure of the fluctuations at different magnitudes have unique properties. The cross-correlations among small fluctuations are much more stronger than those among large fluctuations. T...
Article
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This paper examines money creation process of the banking system when it is complying with the Liquidity Coverage Ratio (LCR). A stock-flow based dynamic model of credit creation process is developed in which the commercial bank supplies loans to the firm. The change of credit is governed by the bank lending and the repayment of the existing loans,...
Article
Power law distribution has been found in China with income data from 1998 to 2002 previously. With data from China Household Income Projects taken in 1988 and 1995, the distribution's evolution procedure before power-law is studied, and power-law distribution is identified occurred in the late 90s. Economical analysis reveals a fact that the major...
Article
Full-text available
This paper presents a multi-agent model describing the main mechanisms of money creation and money circulation in a credit economy. Our special attention is paid to the role of debt in the two processes. With the agent-based modeling approach, macro phenomena are well founded in micro-based causalities. A hypothetical economy composed of a banking...
Article
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Recent years have witnessed a growing interest in analyzing a variety of socio-economic phenomena using methods from statistical and nonlinear physics. We study a class of complex systems arising from economics, the lowest unique bid auction (LUBA) systems, which is a recently emerged class of online auction game systems. Through analyzing large, e...
Article
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In this paper, we propose a collective game where agents, distributed in one-dimensional space, seek for their best positions through adaptive learning. The movements of agents are driven by a simple rule: they are attracted by others with higher status and yet restricted by their initial positions, according to which a benefit function is formulat...
Article
As an aggregate measure of the variations in individuals, the analysis of mobility provides a substantial and comprehensive perspective into the complexity of socio-economic systems. In this paper, we introduced the ranking mobility index to measure the ranking variations of the stocks in Chinese stock market over time. Using the daily data of 837...
Article
The global economy is a complex dynamical system, whose cyclical fluctuations can mainly be characterized by simultaneous recessions or expansions of major economies. Thus, the researches on the synchronization phenomenon are key to understanding and controlling the dynamics of the global economy. Based on a pairwise maximum entropy model, we analy...
Chapter
The dynamics of how fair offers come about in ultimatum game is studied via the method of agent-based modeling. Both fairness motive and adaptive learning are considered to be important in the fair behavior of human players in concerning literature. Here special attention is paid to situations where adaptive learning proposers encounter responders...
Chapter
In this paper an agent-based model is developed to simulate the evolution of a decentralized market with network externality. The traders in the market who are characterized by their willingness prices adjust their ask or bid prices to maximize their own individual surplus subject to the social effect of cumulative transaction. The decentralized ma...
Article
Full-text available
The Lowest Unique Bid Auction (LUBA) booms recently through the Internet. A typical distribution pattern of bid price in this reverse auction has been found and needs to be interpreted. The distribution curve is a decreasing one whose slope has a close relationship with the number of agents participating in the auction. To explain this stylized fac...
Article
Mobility is a significant supplementary piece of information when discussing the inequality of a society based on income distribution. To date, most of its characteristics require disambiguation and specification. In this paper, we will investigate the dependence of relative mobility on sampling time interval both empirically and theoretically. Usi...
Article
In this paper, the dynamical process of money creation in a random exchange model with debt is investigated. The money creation kinetics are analyzed by both the money-transfer matrix method and the diffusion method. From both approaches, we attain the same conclusion: the source of money creation in the case of random exchange is the agents with n...
Conference Paper
Aggregation is widespread in the nature, and mutual benefit is considered as an important factor causing it. An agent-based model is proposed to demonstrate emergence of aggregations in a self-organized system, in which agents move according to their corresponding benefits obtained from interactions. The concept of entropy is introduced as a measur...
Conference Paper
This paper considers the dynamics of an N-players Cournot game with quadratic dynamical system for stochastic output adjustment of firms. For each output adjustment, the firms can apply 3 strategies: increasing, decreasing or maintaining their last output based on their naive expectation and adaptation judgement. We concentrate on the transition pr...
Article
This paper considers the macroscopic and microscopic statistical features of the top 500 firms in China, the United States and the world, denoted as China 500 (CH500), Fortune 500 (US500) and Fortune Global 500 (FG500). From a macroscopic perspective, the firm size distribution of each category, when measured by revenue, is steadily distributed ove...
Article
Rating the raters has attracted extensive attention in recent years. Ratings are quite complex in that the subjective assessment and a number of criteria are involved in a rating system. Whenever the human judgment is a part of ratings, the inconsistency of ratings is the source of variance in scores, and it is therefore quite natural for people to...
Article
A collective game is studied via agent-based modeling approach, where a group of adaptive learning players seek for their best positions on a vertical line. The movements of players are driven by benefits obtained from interactions. The game falls into an evolutionary stable state, at which aggregations of players on the line emerge. The pattern of...
Article
In this article, we attempt to explain the fair outcome of ultimatum game experiments using the evolutionary dynamics. The players of the game, the proposers and the responders, are randomly matched to play the game. When the responders face low offers from the proposers, their decisions are influenced by not only the monetary payoff but also their...
Article
Full-text available
In the market economies, sustained output growth is always accompanied by persistent fluctuations. Whether the fluctuations are caused by external shocks or deterministic forces has been a controversial issue in economics, with the dominant mainstream paradigm favouring the former. Here we examine the hypothesis that an important determinant of per...
Conference Paper
Full-text available
The term mobility has different meanings in the following academic disciplines. In economics, mobility is the ability of an individual or a group to improve their economic status in relation to income and wealth within their lifetime or between generations. In information systems and computer science, mobility is used for the concept of mobile comp...
Article
Individual donation depends on personal wealth and individual willingness to donate. On the basis of a donation model proposed in our previous study, a simplified version of an individual donation model is derived by relaxing the restrictions of the maximum wealth in the economy. Thus, the whole distribution is determined by only two parameters. On...
Article
Full-text available
This paper studies the statistical characteristics of Chinese surnames, first names and full names based on a credible sample. The distribution of Chinese surnames, unlike that in any other countries, shows an exponential pattern in the top part and a power-law pattern in the tail part. The distributions of Chinese first names and full names have t...
Article
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The distribution of Chinese family names is investigated based on data of the fifth national census of China in 2000, including 7329 Chinese family names and 1.28 billion people. The cumulative distribution function (CDF) of family name in multiple scales is presented and the correlation between distribution and scale is discussed. The fitting resu...
Article
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We systematically study the size dependency of income distributions, i.e. income distribution versus the population of a country. Using the generalized Lotka—Volterra model to fit the empirical income data for 1996–2007 in the U.S.A., we find an important parameter λ that can scale with a β power of the size (population) of the U.S.A. in that year....
Article
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The small-world phenomenon is one of the most important properties found in social networks. It includes both short path lengths and efficient navigation between two individuals. It is found by Kleinberg that navigation is efficient only if the probability density distribution of an individual to have a friend at distance r scales as P(r) ∼ r(-1)....
Article
An evolutionary model was proposed to investigate how the economy can evolve from a system of barter to monetary trade. The replicator equation was employed to describe the process how boundedly rational agents shift their strategies. In doing so, it is found that when the probability of monetary trade is larger than that of barter, the agents chan...
Conference Paper
In this paper, we investigate how agents' value expectation to fiat money influence circulation of fiat. We use both replicator dynamics and multi-agent simulation to describe how rational agents shift their strategies and gradually accept fiat in the transactions. We find that higher value expectation and more specialization in social production m...
Article
Full-text available
In this paper, we analyzed time series of Shanghai stock index with complex network theory. The degree distribution of the network extracted from the original series can be well fitted with a power law, while the network from return series is governed by an exponential degree distribution. Compared with the time series of standard Brownian motion,...
Article
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In this paper, we show that over the period 1970-2007, the world income distribution expressed in terms of GDP per capita invariably scales down as an exponential law. To visualize dynamical characteristics behind this macro-stability, we use a clock form to present the GDP per capita and rank of the 163 countries over 38 years. Correspondingly, th...
Article
Full-text available
In this paper we present the relation between Keynesian multiplier and the velocity of money circulation in a money exchange model. For this purpose we modify the original exchange model by constructing the interrelation between income and expenditure. The random exchange yields an agent's income, which along with the amount of money he processed d...
Article
Full-text available
In this paper the income vector space is employed as a unified setting to analyze income mobility. The income mobility can be characterized by a change of the income vector during a given period: the norm of two income vectors can be formulated as a mobility index, which is found to be more generalized than those previous indexes; the angle between...
Article
Full-text available
With income data from Chinese household income projects in 1998–2002, we study the functional form of Chinese income distribution. The fitting results suggest a log-normal distribution plus a power-law tail. This distributional form has changed a lot from its appearance in the early stage of China's reform and turns out to be consistent with that o...
Conference Paper
The empirical works demonstrate that wealth distribution and income distribution have very similar characteristics. This fact makes some researchers fall into a confusion of the two distributions. As important economic variables, wealth and income are quite different in both concept and measurement. These differences should be recognized and embodi...
Conference Paper
Full-text available
In this paper, we examined the micro-dynamics under the stable size distribution of top 500 Chinese enterprises from 2002 to 2009. The data shows the overall distribution of firm size are quite stable even after financial crisis, while firms' revenue, rank-order and share change rapidly. Thus, we illustrate the micro changes of top 500 Chinese firm...
Article
Full-text available
In addition to the well known common properties such as small world and community structures, recent empirical investigations suggest a universal scaling law for the spatial structure of social networks. It is found that the probability density distribution of an individual to have a friend at distance $r$ scales as $P(r)\propto r^{-1}$. The basic...
Article
In order to investigate the relationship between the surface pollen and modern vegetation, surface soil samples collected from 34 sites in Zoigê Plateau were analyzed, and then the pollen assemblages of every zone were obtained. It is found that pollen assemblages of surface soil samples generally reflect the whole features of the modern vegetation...
Article
Full-text available
The power law or Zipf's law phenomena in human behaviors have been widely observed and attracted intensive attention. In this letter, a new evidence on personal donation is presented and analyzed. A sample of donation to the victims of Sichuan earthquake in 2008 demonstrates that donation distribution has a particular pattern. The upper part is gov...
Article
Photo-induced enhancement processes of the third-order optical nonlinearity were observed in azobenzene solution under a 30ps pulse pumping at 532 nm. Weinvestigated the time evolution of the enhancement and found that it was mainly due to the population of the first excited state. By theoretical simulation of the enhancement processes, the values...
Article
By analyzing the data of top 500 Chinese firms from the year 2002 to 2007, we reveal that their revenues and ranks obey the Zipf’s law with exponent of 1 for each year. This result confirms the universality of firm size character which has been presented in many other empirical works, since China possesses a unique ideological and political system....
Article
A statistical approach to market equilibrium and efficiency analysis is proposed in this paper. One factor that governs the exchange decisions of traders in a market, named willingness price, is highlighted and constitutes the whole theory. The supply and demand functions are formulated as the distributions of corresponding willing exchange over th...
Article
Full-text available
In this paper, we propose an evolutionary model to investigate how an econ-omy can evolve from a system of barter to monetary trade, while regarding the latter as involving reciprocal altruistic behavior. We use a replicator equation to describe how bounded rational agents shift their strategies, and in doing so, present an alternative solution to...
Conference Paper
Full-text available
In this paper, we reveal that the top 500 Chinese firms' operating revenues and their ranks completely obey the Zipf distribution with exponents of 1 in recent six years. Similar distribution can be confirmed in some other countries. It universally exists in many economic systems of the world. Based on simple multiplicative process model with the p...
Conference Paper
In this paper, we present an agent-based model to verify the multiplier theory in macroeconomics and make an extension in the research of realization time of multiplier. We employ a simple model in which agents exchange money with each other and the multiplier effect is an emerging phenomenon of individual transactions. The model assumes that agent...
Article
In this paper we study a duopoly game in which two firms decide their product qualities in the first stage and set prices in the second stage. The two firms are bounded rational so that they adjust the price gradually according to the marginal profit. We examine a discrete dynamic system and analyze stability of the equilibrium. The parameter space...
Article
In this paper, the authors investigate the phenomenon of mobility based on a random exchange model. Economic mobility is a supplemental index in evaluating and comparing inequalities with respect to wealth or income distribution. The dynamic characteristics of mobility can be fully exhibited by an agent-based model in which agents exchange money wi...
Article
We report the measured results of non-resonant nonlinearity by degenerate four-wave mixing for Cu2O nanoparticles having central diameter of 9 nm. The value of χ(3) obtained in a 10 ns pulse experiment is 8.48 × 10-10 esu, and the nonlinear response time of the sample is estimated to be in the order of nanosecond.
Article
Full-text available
Social network structure is very important for understanding human information diffusing, cooperating and competing patterns. It can bring us with some deep insights about how people affect each other. As a part of complex networks, social networks have been studied extensively. Many important universal properties with which we are quite familiar h...
Article
Using the data from the China Health and Nutrition Survey (CHNS), we measured the income mobility of households in China from 1989 to 2000. The results are decomposed into three sources: exchange, growth, and dispersion. These results show that the household income mobility in China remained at a high level from 1989 to 2000, which is due to an exc...
Article
A complete sequence of late Cenozoic lacustrine deposits, loess, red clay and glacial deposits is developed on the eastern margin of the Qinghai-Tibet Plateau. Deposits of different origins recorded rich information of paleoenvironmental change since the late Cenozoic. The Pliocene lacustrine deposits at Xigeda occurred at 4.2-2.6 Ma BP. There were...
Article
The Zoigê Plateau basin, which used to be the best pasture on the southeastern margin of the Qinghai-Tibet Plateau, is one of the five largest pastures of China. The ecological environment of the Zoigê Plateau basin is fragile and the ecological balance is easy to destroy. Once the balance is destroyed, the environment will tend to degrade graduall...