From FDI Network Topology to Macroeconomic Instability

De Masi G. and Ricchiuti G. (2020)
Journal of Economic Interaction and Coordination, Volume 15, Issue 1, pages 133 – 158

Fragmentation of production undoubtedly constitutes a possible channel of economic contagion and could play a key role in the study of systemic risk. Investments abroad implicitly create long-range economic dependencies between investors and the economies of destination, possibly triggering contagion phenomena. Complex network theory is a primary tool for highlighting economic mutual relationships and paths of contagion, shedding light on intrinsic systemic risks. In this paper, we reconstruct the EU28 foreign direct investments network and study its evolution from 2003 to 2015. Our analysis aims at detecting the changes of topological properties during the crisis, in order to assess how they affected the architecture of economic relationships. Through a detailed study of correlations at different time lags between network measurements and macroeconomic variables, we assess systemic risks. The main findings are: (i) 2009 marks a clear break in network evolution: prior to 2009 the structure was characterized by only one or few hubs/ countries, while in later years a set of connected key nodes emerged; (ii) an increasing heterogeneity is observed in link weights during the entire period analysed (2003–2015); (iii) after 2009, a rewiring of investments is observed towards the EU28 countries that are considered more safe; (iv) time-lagged centrality measures and macroeconomic variables show a clear correlation.

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Does the Same FDI Fit All? How Competition and Affiliates Characteristics Affect Parents’ Productivity

Giovannetti G., Marvasi E. and Ricchiuti G. (2019)
Italian Economic Journal, vol. 5(3), pages 369-402, October. (preliminary version WP13/2015 DISEI Università di Firenze)

This paper investigates the heterogeneity within the group of foreign direct investors by analyzing the relation between parents’ productivity, the degree of domestic competition and the characteristics of their affiliates. Our results show that there is no unique recipe. Foreign direct investors may benefit differently depending on the economic environment in which they operate. Building an original 10-year panel dataset of Italian investors, we find that larger manufacturing parents tend to have more, larger and more productive affiliates in a higher number of destinations as well as being more productive in terms of total factor productivity. Having affiliates in high income countries or in both high and low income countries is associated with a productivity premium vis-à-vis investors in low income countries. Parent sector characteristics such as technology and degree of competition are also associated with productivity in a non-monotonic way. Low income country investors are found to be relatively more productive when operating in more competitive low technology sectors, while the opposite holds true for high income country investors, which become more productive when operating in less competitive high technology sectors.

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Fragmentation of Production: New Challenges for Big Data-A Complex Network Approach

De Masi G. and Ricchiuti G. (2019)
Journal of Communications, vol. 14 n.5

Globalization is one of the most relevant economic phenomena of the last decades. Due to this reason, the economies of different countries are strongly interconnected. This may lead to higher robustness or higher vulnerability of the whole economic system,depending on the economic scenario.Traditional models are unable to represent the complex relationship among firms. This may lead to a misunderstanding of the complex interconnections between countries, underestimating vulnerability of the world economicsystem. In this framework, a complex network approach, based on graph theory, is a valuable tool to outline the interdependencies of different countries and their impact on the stability of the whole economic system. Nowadays economic Big Data are available on globalization, helping to have a rigorous approach when shading light on these interdependencies. In this paper,the complex network analysis is applied on a particular shade of globalization, namely fragmentation of production.

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The Network of the European Outward Foreign Direct Investments

De Masi G., Ricchiuti G., (2018)
in Smith M., Amighini A., Gorgoni S., Networks of International Trade and Investment, March 2018, ed. Vernon Press

While there is a broad acknowledgment of the role of global value chains (GVCs) in the world economy, we are still at the beginning of their empirical investigation. At the macro level, input-output tables offer a powerful tool to assess all the inter-country and inter-industry transactions that culminate in the sale of final goods and services. At the micro level, case studies have implemented the GVC approach to understand the governance of specific value chains. In Networks of International Trade and Investment, Sara Gorgoni, Alessia Amighini and Matthew Smith have put together a series of novel approaches that deepen our understanding of GVCs and bridge the gap between the micro and macro analysis. Using state-of-the-art network analysis, the book provides new insights on the interdependencies that characterise trade, investment and global production. As compared to other empirical methods, network analysis allows to better identify the contribution of a country, industry or firm by not focusing on its own characteristics but by looking at how it is connected to others. As a consequence, new patterns and new structures emerge. The book includes many examples of how this approach can bring a fresh look to challenging research questions. While technical, the book remains accessible and can be read by a broad audience that includes policymakers. In the future, we could learn more by linking such analysis to economic performance. In particular, one would like to understand better how the position in the network is related to productivity or can bring specific economic gains.

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A Dynamic Exchange Rate Model with Heterogenous Agents

Gori M. and Ricchiuti G. (2018)

Journal of Evolutionary Economics, Volume 28, Issue 2, pp 399 – 415

In this paper, we analyze a heterogeneous agent model in which the fundamental exchange rate is endogenously determined by the real markets. The exchange rate market and the real markets are linked through the balance of payments. We have analytically found that there exists at least a steady state in which the exchange rate is equal to its fundamental value and incomes of both countries are equal to the autonomous components times the multiplier (as in the Income-Expenditure model). This steady state can be unique and unstable when all agents act as contrarians, while when agents act as fundamentalists it is unique but its stability depends on the reactivity of actors of the market. Finally, we show that the (in)stability of the economic system depends on both the reactivity of the markets and that of different types of agents involved. Employing well-know functional forms, we show that the model can replicate some of the statistical features of the true time series of the exchange rate.

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A Multilevel Analysis of the Unemployment in Egypt

Bertoni E. and Ricchiuti G. (2017)

LABOUR: Review of Labour Economics and Industrial Relations, Volume 31, Issue 4 December 2017 Pages 494–514

Despite its recent economic development, Egypt’s employment inequalities among gender and different age cohorts are still an unresolved issue. In this work we apply a Multilevel Generalized Linear Mixed Model to the Egyptian Labor Market Panel Survey 2006 (ELMPS 2006) and 2012 (ELMPS 2012). By exploiting the hierarchical structure of the survey data, we investigate how the interplay between individual characteristics and regional context affects Egyptians’ individual probability of being unemployed. Moreover, we attempt to identify if and how these same characteristics have changed between 2006 and 2012 as a consequence of the major changes that re‐shaped Egyptian demographics, labor market structure, and young cohorts’ educational achievements.

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Size & Technology: The Odd Couple for Affiliates Survival

Giovannetti G., Ricchiuti G. and Velucchi M. (2017)

Structural Change and Economic Dynamics, Volume 40, March 2017, Pages 64 – 71

Firms’ survival and internationalization modes are key elements to assess a country’s competitiveness. We draw on this to study how firms’ characteristics affect business demographic dynamics. We focus on affiliates survival probability, modeling it conditional on both parent company’ and affiliates’ set of characteristics. We generalize the base model used in business demography, disentangling and stressing the effects of both size and technological relationships between affiliates and investors. We show that, larger affiliates of large investors compete better and survive longer. Being part of a network of affiliates in the same country and/or sector improves firm survival probability. When investors have a higher (lower) technological level than their affiliates, the affiliates’ failure probability increases (decreases). An investor more technologically advanced than its affiliates, it is likely to consider them a cost-saving investment. While affiliates with a higher level of technology than their parent may be considered strategic.

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Heterogeneous Fundamentalists and Market Maker Inventories

Carraro A. and Ricchiuti G. (2015)

Chaos Solitons and Fractals, Volume 79, October 2015, Pages 73–82

In this paper, we develop a heterogeneous agents model of asset price and inventory with a market maker who considers the excess demand of two groups of agents that employ the same trading rule (i.e. fundamentalists) with different beliefs on the fundamental value. The dynamics of our model is driven by a bi-dimensional discrete non-linear map. We show that the market maker has a destabilizing role when she actively manages the inventory. Moreover, inventory share and the distance between agents’ beliefs strongly influence the results: market instability and periodic, or even, chaotic price fluctuations can be generated. Finally, we show through simulations that endogenous fluctuations of the fractions of agents may trigger instability for a larger set of parameters.

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Complexity with Heterogeneous Fundamentalists and a Multiplicative Price Mechanism

Naimzada A. and Ricchiuti G., (2014)

Economic Notes, 43: 233–247

In contrast with the canonical models of financial markets with heterogeneous agents,, Naimzada and Ricchiuti, (2008, 2009) show that the interaction of groups of agents who have the same trading rule but present different beliefs about the fundamental value could be a source of instability. In this paper, differently from, Naimzada and Ricchiuti, (2008, 2009), we assume that the market maker employs a so‐called multiplicative price mechanism (Tuinstra, 2002; Zhu et al., 2009). We show that the occurrence of heterogeneity has an ambiguous role: it may either stabilize or destabilize the market.

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Heterogeneity in Managerial Strategies and Internationalization of Firms: the Case of Italy

Giovannetti G., Ricchiuti G. and Velucchi M. (2013)

Economia e Politica Industriale, vol. 2

The recent empirical literature on firm performance has highlighted the multidimensional concept of managerial strategies. The paper analyzes the nexus between these strategies and performance based on specific entrepreneurs’ characteristics, corporate strategies, organizational capabilities and firms’ approaches to internationalization. Using a dataset obtained by matching and merging Capitalia, ICE-Reprint and AIDA surveys we investigate the possible non-linear impact of managerial strategies on firm performance in Italy. While the specific entrepreneurs’ characteristics do not seem to have a significant impact on firm performance, the mode of internationalization plays an important role. Important non-linearities arise when we singled out the role of skilled workers and managers in determining a firm’s success in highly competitive markets.

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Market Equilibrium in the Presence of Green Consumers and Responsible Firms: a Comparative Statics Analysis

Doni N. and Ricchiuti G. (2013)

Resource and Energy Economics, vol. 35, pp. 380-395 (preliminary version WP07/2011, Dipartimento Scienze Economiche, Università di Firenze)

This paper analyzes how the interaction between green consumers and responsible firms affects the market equilibrium. The main result is that a higher degree of responsibility of consumers and/or firms may both increase and decrease the total abatement and the social welfare. In general an increment in the degree of CSR of a firm entails an increase of its total clean-up and a reduction of the aggregate abatement of its rival. When the rival firm has a high degree of CSR this second effect is stronger than the first and total abatement falls down. At the same time, when the degree of consciousness of consumers and/or firms is very high, responsible firms overprovide environmental quality: in such case a further increment in the level of social responsibility of a market actor may trigger an increase of firms’ total clean-up but a reduction in social welfare.

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Location, Internationalization and Performance of Firms in Italy: a Multilevel Approach

Giovannetti G., Ricchiuti G. and Velucchi M. (2013)

Applied Economics, Volume 45, Issue 18 (preliminary version Working Papers Series 09/2009, Dipartimento di Scienze Economiche, Università degli Studi di Firenze)

Competition is increasingly global. However, location still matters: often firms cluster in the same geographic areas in order to exploit locational externalities and improve their competitiveness. This article analyses how Italian firms’ performance, proxied by their propensity to export, depends both on geographical and institutional context and on individual characteristics. Using a multilevel approach, we estimate and distinguish the effect of individual (firm level) and context (province level) variables on the performance of internationalized Italian firms. We show that both firms and province heterogeneity shape the results.

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Network Analysis to Detect Common Strategies in the Italian Foreign Direct Investment

De Masi G., Giovannetti G. and Ricchiuti G. (2013)

Physica A: Statistical Mechanics and its Applications, Volume 392, Issue 5, 1 March 2013, Pages 1202 – 1214 (preliminary version WP17/2010, Dipartimento Scienze Economiche, Università di Firenze)

In this paper we reconstruct and discuss the network of Italian firms investing abroad, exploiting information from complex network analysis. This method, detecting the key nodes of the system (both in terms of firms and countries of destination), allows us to single out the linkages among firms without ex-ante priors. Moreover, through the examination of affiliates’ economic activity, it allows us to highlight different internationalization strategies of “leaders” in different manufacturing sectors.

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Studying Heterogeneity among Fundamentalists in Financial Markets: A Note

Naimzada A. and Ricchiuti G. (2012)

Applied Mathematics and Computation, Volume 219, Issue 3, 15 October 2012, Pages 792 – 799

In this note, developing a model with agents that act as fundamentalists, we show that adding simple stochastic components, a greater set of parameters can lead to complex dynamics. Moreover, we identify periods of financial distress between bubbles and crashes detected by Kindleberger [C.P. Kindleberger, Manias, Panics, and Crashes: A History of Financial Crisis, fourth ed., John Wiley, New York, 2000] from a series of famous speculative bubbles and crashes in world history.

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A Note on Biased Fundamentalists

Naimzada A. and Ricchiuti G. (2012)

Chaos Solitons and Fractals, Volume 45, Issue 3, March 2012, Pages 224–228

In this note, we report a result not recognized in the model analyzed in Naimzada and Ricchiuti (2009) [1]: heterogeneity may have an ambiguous role in the complex dynamics. Indeed, given high reactivity of either market maker or agents, an increasing heterogeneity initially stabilizes the price (through a subcritical period two cycle) and then it destabilizes the price (initially through a pitchfork bifurcation). Moreover, we define better the structure of beliefs, highlighting their position in comparison with a unique (not observed) fundamental value and assuming that agents are pure biased traders.

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Size, Innovation and Internationalization: A Survival Analysis of Italian Firms

Giovannnetti G., Ricchiuti G. and Velucchi M. (2011)

Applied Economics, Volume 43, Issue 12, Pages 1511 – 1520 (preliminary version – working paper 07/2007, Dipartimento Scienze Economiche, Università degli Studi di Firenze)

Firms’ survival is often seen as crucial for economic growth and competitiveness. This article focuses on business demography of Italian firms, using an original database, obtained by matching and merging to gain the intersection of three firm level datasets. This database allows us to simultaneously consider the effect of size, technology, trade, FDIs and innovation on firms’ survival probability. We show that size and technological level positively affect the likelihood of survival. Internationalized firms show higher failure risk: on average competition is stronger in international markets, forcing firms to be more efficient. However, large internationalized firms are more likely to ‘survive’. An Italian internationalized firm to be successful and to survive, should be high-tech, large and innovative.

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Monopoly with Local Knowledge of Demand Function

Naimzada A. and Ricchiuti G. (2011)

Economic Modelling, Volume 28, Issues 1-2, January-March 2011, Pages 299-307

In this note, we propose a model where a quantity setting monopolist has incomplete knowledge of the demand function. In each period, the firm sets the quantity produced observing only the selling price and the slope of the demand curve at that quantity. Given this information and through a learning process the firm estimates a linear subjective demand curve. We show that the steady states of the dynamic equation are critical points of the objective profit function. Moreover, results depend on convexity/concavity of the demand. When the demand function is convex and the objective profit function has a unique critical point: the steady state is a globally stable maximum; conversely when then steady state is not unique, local maximums are locally stable, while local minimums are locally unstable. On the other hand when the demand function is concave, the unique critical point is a maximum: there can be stability or instability of the critical point and period two cycles around it via a flip bifurcation. Moreover, through simulations we can observe that, with a mixed inverse demand function, there are different dynamic behaviors, from stability to chaos and that we have transition to complex dynamics via a sequence of period-doubling bifurcations. Finally, we show that the same results can be obtained if the monopolist is a price setter.

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Exchange Market Pressure: Some Caveats in Empirical Applications

Naimzada A. and Ricchiuti G. (2009)

Chaos Soliton and Fractals Volume 41, Issue 4, Pages 1764-1772 (Earlier version working paper n.111, Dipartimento di Economia Politica, Università degli Studi di Milano-Bicocca)

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Dynamic effects of increasing heterogeneity in financial markets

Naimzada A. and Ricchiuti G. (2011)

Economic Modelling, Volume 28, Issues 1-2, January-March 2011, Pages 299-307

Despite canonical behavioural financial market models [Day R, Huang W. Bulls, bears and market sheep. J Econ Behav Org 1990;14:299–329], that use different types of agents (i.e., fundamentalist vs. chartists), we develop a model in which the source of instability is the interaction of groups that are homogeneous in the strategy they use, but have heterogeneous beliefs about the fundamental value of the asset. Specifically, heterogeneity arises among two groups of fundamentalists that follow gurus. We show that an increasing distance between beliefs (the degree of heterogeneity), leads first (i) to a pitchfork bifurcation to arise secondly (ii) it generates, together with a larger reaction to misalignment of both market maker and agents, the appearance of a periodic, or even, chaotic, price fluctuation; (iii) finally a homoclinic bifurcation [Dieci R, Bischi GI, Gardini L. From bi-stability to chaotic oscillations in a macroeconomic model. Chaos, Solitons & Fractals 2001;12:805–22] transforms a two piece chaotic set into a one piece chaotic set that generates bull and bear markets.

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Complex dynamics in a monopoly with a rule of thumb

Naimzada A. and Ricchiuti G. (2008)

Applied Mathematics and Computation, Volume 203, Issue 2, 15 September 2008, Pages 921-925

In this paper, we analyze the equilibrium effects of a monopolist with bounded rationality. Assuming that the entire (monotonic) demand function is unknown, she employs a rule of thumb to produce a quantity that guarantees the largest profits. The steady state of the map is equal to the level of price that maximizes profits, as can be seen in the classical microeconomic theories. However, complex dynamics can arise, especially when the reaction coefficient to variation in profits is high.

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Heterogeneous Fundamentalists and Imitative Processes

Naimzada A. and Ricchiuti G. (2008)

Applied Mathematics and Computation, Volume 199, Issue 1, 15 May 2008, Pages 171-180. (Earlier version working paper n 104, Dipartimento di Economia Politica, Università degli Studi di Milano-Bicocca, 2006)

Developing a model with a switching mechanism, we show how complex dynamics can be generated even though heterogeneity arises among agents with the same trading rules (fundamentalists). We assume that there are two experts which are imitated by other operators. We show that (i) market instability and periodic, or even, chaotic price fluctuations can be generated; (ii) conditions exist under which an expert can drive another expert out of the market; (iii) two experts can survive when the dynamic system either generates a period doubling bifurcation around an attractor or when an homoclinic bifurcation leads to the merging of the two attractors [R. Dieci, G.I. Bischi, L. Gardini, From bi-stability to chaotic oscillations in a macroeconomic model, Chaos, Solitons and Fractals 12 (2001) 805–822]; (iv) a central role is played by the reaction to misalignment of both market maker and agents.

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The Effects of the new patterns of FDI on growth and inequality

Bonassi C., Giovannetti G. and Ricchiuti G. (2006)

in G.A. Cornia (ed), Pro-poor Macroeconomics, ed. Palgrave

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The effects of the new patterns of FDI on growth & inequality: the case of Southern Mediterranean Countries

Giovannetti G. and Ricchiuti G. (2006)

in El Sheikh M.S. and Giovannetti G. (2006), “Economic Cooperation among the countries in the Mediterranean area (II)”