WORKING PAPERS 2024

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2024-31

Three views on economic power

Alexandre Chirat, Ulysse Lojkine

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Abstract
We investigate the concept of economic power in the three main paradigms of economic thinking in the 20th century: neoclassical, marxist and institutionalist. We propose a reconstruction, based on a new taxonomy, of the various forms of power conceptualized by each of them. In particular, we claim that the neoclassical paradigm contains a consistent although often implicit theory of power. We then show that many controversies between these paradigms were debates on power and that some shifts in mainstream economics in the 1970s and 1980s are a reaction to the criticisms leveled against the neoclassical conceptualization of power.
Mot(s) clé(s)
Power – Markets – Consumer sovereignty – History of economics
2024-30

Arbitrage entre assurance et auto-assurance contre les risques naturels

Guibril Zerbo

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Abstract
This article studies the effect of preferences on an individual's optimal choice between insurance demand and self-insurance in a risk context and then in an ambiguous context. The innovative idea in this paper is to introduce ambiguity about the effectiveness of self-insurance to understand the nature of the relationship between insurance demand and self-insurance demand. We show that an increase in risk aversion increases the demand for insurance and decreases the demand for self-insurance. However, when risk is introduced on the effectiveness of self-insurance, we show that the individual still prefers self-insurance to market insurance. We also show that when ambiguity is introduced on the efficacy of self-insurance, the individual always prefers market insurance to self-insurance. Finally, we determine the conditions under which the individual's self-insurance effort is higher or lower under ambiguity than risk.
Mot(s) clé(s)
Natural risks, arbitration, insurance, self-insurance, efficacy, risk, ambiguity
2024-29

Do Binding Fiscal Rules Enhance Fiscal Stability? Evidence from European Union Countries

Antonia Lopez Villavicencio, Jocelyne Zoumenou

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Abstract
This study investigates the impact of fiscal rules on EU countries' fiscal stability, particularly within the Stability and Growth Pact (SGP) framework. By rigorously addressing endogeneity concerns, we show that compliance with budget balance rules (BBR) contributes to fiscal stability. However, countries that comply with all the targets imposed by the SGP simultaneously or that established a constitutional BBR do not perform better than countries that comply exclusively with the budget balance rule. Finally, our results indicate that strong fiscal rules are not necessary to achieve better fiscal discipline.
Mot(s) clé(s)
Fiscal rules; Compliance; European Union; Instrumental Variables; Treatment Effect Models
2024-28

Sustainable economic policies: exploring the effects of ecosystemic macroprudential regulations

Thomas Lagoarde Segot, Gaëtan Le Quang, Laurence Scialom

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Abstract
This paper explores the implications of ecosystemic macroprudential regulations on sustainability in an ecological PK-SFC framework. We first discuss the link between banks and global warming; and present the case for connecting prudential regulation with planetary boundaries. We then report a set of simulations suggesting that in the short run, such ecosystemic prudential regulations could effectively green banks’ balance sheets, credit flows, and curtail brown investment, at the cost, however, of significant short-run losses. In the longer run, the induced green transition appears to set the economy on a more sustainable pathway, to decrease inflationary pressures, and to maintain real GDP at the baseline level, with distributional effects favourable to wage-earners. These results highlight the relevance of ecosystemic prudential regulation to tackle climate change and call for adopting a holistic approach to sustainability policies.
Mot(s) clé(s)
ecological finance, SFC modelling
2024-27

Global Spillovers of US Monetary Policy: New Insights from the Remittance Channel

Pablo Aguilar Perez

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Abstract
This paper examines the global spillovers of US monetary policy through the remittance channel. We use Jordà (2005) local projections to assess the effects of a US monetary policy tightening on 8 major remittance-sending countries and 41 recipient countries over the period from January 1997 to December 2017. Our findings reveal that such monetary tightening significantly impacts not only the US economy but also key remittance-sending nations, resulting in a global contractionary effect. The impact on recipient countries varies based on their reliance on remittances, underscoring the dual role of these personal transfers as both an amplifier and a mitigator of the global business cycle. Specifically, countries with high dependency on remittances experience heightened pro-cyclicality, leading to declines in both output and inflation, while those with moderate or low reliance exhibit counter-cyclical behavior.
Mot(s) clé(s)
Global spillovers, Remittances, US monetary policy
2024-26

Carbon intensity and corporate performance: A micro-level study of EU ETS industrial firms

Alienor Cameron, Maria Garrone

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Abstract
To reach its 2050 objective of carbon neutrality, the European Union (EU) must continue to step up its climate efforts, while ensuring the competitiveness of its industries is not harmed. The EU Emission Trading Scheme (ETS) is at the core of the bloc's industrial decarbonization efforts. This paper explores this topic by digging into whether there is a causal relationship between industrial firms' emission intensity and their economic and financial performance. We construct a dataset covering around 1,200 industrial firms covered by the EU ETS' third phase and estimate a novel indicator of volume-based emission intensities for these firms. Applying an IV approach to a within-firm panel model, we find that firms' emission intensity is negatively related to their corporate performance, and that this does not depend on the competitive environment they operate in.
Mot(s) clé(s)
EU ETS, heavy industry, emission intensity, corporate performance.
2024-25

Democracy, Epistocracy and Hybrid decision-making: Information specificity and costs of political governance

Alexandre Chirat, Cyril Hédoin

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Abstract
This paper contributes to the Democracy versus Epistocracy debate (Brennan and Landemore 2022) by providing a theoretical framework and a criterion to choose between democratic, hybrid and epistocratic modes of political governance. From a normative perspective, we claim that the specificity of information should (at least partially) guide the choice between these modes of political governance because of its impact on costs of political governance. The main logic of the model is the following: an issue has a degree of information specificity that determines costs of political governance combined in a Social Costs Function. Therefore, the model helps to assess the relative efficiency between democratic, hybrid and epistocratic decision-making procedures to reach collective choices.
Mot(s) clé(s)
Democracy – Epistocracy – Social Choice – Information – Social Costs Function
2024-24

Shipping Trade and Geopolitical Turmoils: The Case of the Ukrainian Maritime Network

Fabio Cremaschini, César Ducruet, Marc-Antoine Faure, Bárbara Polo Martin

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Abstract
Conflicts, whether political, commercial or military, affect transport networks. Operators seek to avoid the most tense areas or reconsider certain routes. Certain links can be disrupted in case of local geopolitical tensions, which can have a significant global impact. The article is devoted to studying Ukraine’s maritime network and identifying changes in these structures because of the conflict that started in 2014. The purpose of the paper is to measure and visualise the main changes in the Ukrainian seaport system and maritime forelands from 2010 until the most recent data available (December 2023), from a network models, bilateral trade and route simulation framework. The principal results confirm the huge impact of military conflict on port connectivity, thereby contributing to the recent literature on shipping network vulnerability.
Mot(s) clé(s)
Black Sea, Complex networks, Shipping Trade, Russian-Ukrainian War
2024-23

Behavioral drivers of individuals’ Term Life Insurance Demand: evidence from a Discrete Choice Experiment

Denis Charles, Magali Dumontet, Johanna Etner, Meglena Jeleva

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Abstract
Term life insurance contracts differ from one another: private information level asked to applicants, options presence in the contract, or claim payment type. Understanding how individuals’ demand is influenced by these possibilities is not straightforward. We explore socioeconomic and behavioral characteristics that might influence term life insurance demand through a Discrete Choice Experiment (DCE). On a sample representative of the French population, we estimate individuals’ characteristics that influence (1) term life insurance purchasing decision and (2) Willingness to Pay for each feature of the contract without testing new features directly in the market. In addition to socioeconomic characteristics, behavioral factors permit to better understand overall demand for term life insurance product as well as characteristics of such contract. Future concerns, optimism about survival, perceived asset management risk, and altruism influence term life insurance purchasing behavior.
Mot(s) clé(s)
Term Life Insurance, Discrete Choice Experiment, Willingness to Pay, Individual Preferences
2024-22

Which Liability Laws for Artificial Intelligence?

Eric Langlais, Nanxi Li

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Abstract
This paper studies how the combination of Product Liability and Tort Law shapes a monopoly' incentives to invest in R&D for developing risky AI-based technologies ("robots") that may accidentally induce harm to third-party victims. We assume that at the engineering stage, robots are designed to have two alternative modes of motion (fully autonomous vs human-driven), corresponding to optimized performances in predefined circumstances. In the autonomous mode, the monopoly (i.e. AI designer) faces Product Liability and undertakes maintenance expenditures to mitigate victims' expected harm. In the human-driven mode, AI users face Tort Law and exert a level of care to reduce victims' expected harm. In this set-up, efficient maintenance by the AI designer and efficient care by AI users result whatever the liability rule enforced in each area of law (strict liability, or negligence). However, overinvestment as well as underinvestment in R&D may occur at equilibrium, whether liability laws rely on strict liability or negligence, and whether the monopoly uses or does not use price discrimination. The first best level of R&D investments is reached at equilibrium only if simultaneously the monopoly uses (perfect) price discrimination, a regulator sets the output at the socially optimal level, and Courts implement strict liability in Tort Law and Product Liability.
Mot(s) clé(s)
Artificial Intelligence, Algorithms, Tort Law, Product Liability, Strict Liability, Negligence
2024-21

L’encadrement des prix en France pendant les « Trente Glorieuses » : Une gestion corporatiste ? (1947-1968)

Basile Clerc

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Abstract
This paper contributes to the analysis of corporatism in post-World War II economic policies in France. Focusing on the “Comité National des Prix” (National Price Committee, CNP), in which employee and employer unions debate price-control decisions, we show that, despite appearances, this institution and, hence, price policy, cannot be considered a form of corporatism. Two elements support this thesis. First, decisions to freeze prices, which were particularly frequent in the 1950s, were systematically adopted despite the joint opposition of the two main trade unions: the CGT and the CNPF. Second, the "contractual turn" in pricing policy in the 1960s, inspired by corporatist thinking and reflections on "incomes policy", took place despite a structural opposition between employee and employer unions. The ambition of a "corporatist turn" in planning in the 1960s was thus thwarted by the persistence of major union antagonisms, as much as by the verticality of decision-making on pricing.
Mot(s) clé(s)
Price control ; corporatism ; incomes policy
2024-20

The Macroeconomics of Free Digital Services

Mathilde Aubouin, Lionel Ragot

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Abstract
Digital technology has enabled the rise of free digital services financed by advertising. These services are increasingly popular and enable a few digital firms to generate significant revenue, although GDP does not directly consider them. This paper presents a growth model with digital services providers collecting household data in exchange for their services, which are used to sell targeted advertising to traditional firms. It enables us to study the impacts of this sector on key macroeconomic aggregates and welfare within the American context. Our results highlight that enhanced activity among large providers (new entry, greater efficiency in producing service quality or advertising) positively impacts the economy. Data collection enables small providers to compete with large ones, which benefit from greater user attention. Household preferences, such as sensitivity to privacy, also play a role, potentially hindering the free digital services sector’s economic impact.
Mot(s) clé(s)
Economic growth; Digital economy; Data economy; Privacy; Advertising
2024-19

Pareto-Optimal Taxation Mechanism in Noncooperative Strategic Bilateral Exchange

Ludovic A. Julien, Gagnie Pascal Yebarth

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Abstract
This paper explores the possibility that a taxation mechanism always implements a Pareto-optimal allocation in bilateral exchange when the market participants behave strategically and noncooperatively. To this end, we reconsider the taxation mechanism, namely the endowment taxation with transfers, implemented in the strategic bilateral exchange models by Gabszewicz and Grazzini (JPET, 1999). In this framework of strategic bilateral exchange, we consider a general class of smooth utility functions, and we determine the conditions under which the taxation mechanism is Pareto-optimal, i.e., whether there exists an equilibrium tax such that endowment taxation with transfers always implements a Pareto-optimal allocation. Furthermore, we explain why this taxation mechanism could implement a Pareto-optimal allocation.
Mot(s) clé(s)
Cournot-Nash equilibrium, Pareto-optimality, taxation
2024-18

The industrial cost of fixed exchange rate regimes

Blaise Gnimassoun, Carl Grekou, Valérie Mignon

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Abstract
Premature deindustrialization in most emerging and developing economies is one of the most striking stylized facts of the recent decades. In this paper, we provide solid empirical evidence supporting that the choice of a fixed exchange rate regime accelerates this phenomenon. Relying on a panel of 146 developed, emerging, and developing countries over the 1974-2019 period, we show that fixed exchange rate regimes have had a negative, significant, and robust effect on the size of the manufacturing sector —developing countries being the most affected by the industrial cost of such a regime. Additional gravity model regressions show that the impact of fixed regimes passes through the trade channel. In particular, this regime has kept countries with low relative productivity in a state of structural dependence on imports of manufactured products to the detriment of the emergence of a strong local manufacturing sector.
Mot(s) clé(s)
Exchange rate regimes; (De)industrialization; Manufacturing; Developing countries; Emerging economies
2024-17

Policy-induced low-carbon innovations for buildings: A room for standards? Evidence from France

Valentin Laprie

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Abstract
Low-carbon technical change in the building sector is a promising solution to address the challenges of climate change, energy security, and public health. We aim to investigate the effects of various environmental policies on low-carbon innovation in the building sector where strong investment barriers transpire, focusing on France as a case study. Pollution taxes, subsidies, standards, which induce more low-carbon innovation? Using a quality index for patents and a Polynomial Distributed Lag Model, our results suggest a limited impact of a carbon tax on promoting low-carbon innovation within the building sector in France. Moreover, our findings indicate that subsidies targeting less polluting technologies emerge as a primary driver of qualitative innovation. Additionally, our study reveals that energy standards for buildings exert a significant albeit temporary influence on the number of patents in relevant technological domains.
Mot(s) clé(s)
Environmental Policy, Technical Change, Patents, Energy Efficiency, Buildings
2024-16

Corruption and leadership in Africa: Evidence from Burkina Faso

Harouna Sedgo

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Abstract
This study assesses the role of a leader in anti-corruption fighting in Africa. It focuses on the rule of Thomas Sankara, one of the legendary figures of contemporary Africa.

Using the synthetic control approach, we design a counterfactual for the actual Burkina Faso called "synthetic Burkina Faso" based on corruption before Sankara's tenure. The difference between Burkina Faso and Synthetic Burkina Faso highlights that the leadership of Thomas Sankara had a substantial effect in reducing corruption in Burkina Faso during his tenure over the period 1983-1987. This reduction effect in 1987 was as much as 70 percent of the 1982 level of corruption in the country. This result is robust to placebo tests.

This finding highlights the leader's importance in shaping African countries' institutional trajectory. To fight corruption, having an exemplary leader is a cure.
Mot(s) clé(s)
Corruption; Leader; Captain Thomas Sankara; Synthetic control approach; Burkina Faso
2024-15

Economie du policing – le cas d’une police de tranquillité publique, la nouvelle police municipale de Paris

Zoltán Szücs

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Abstract
This article proposes to present the state of affairs of French municipal police forces, and to provide a review of the relevant scientific literature at the moment of the creation of the municipal police of Paris. This municipal police was born in a context of low levels of sense of insecurity, but high levels of different kinds of public nuisance, justifying the focus of its activities on the disturbances of public tranquillity. To keep this focus, one of the major issues is to maintain a clear and complementary share of competences with the forces of the national police. However, our article alerts on some difficulties to do so : according to our estimates on panel data, increasing municipal police force size are on average accompanied by a simultaneous drop in the national police force size on a local level in France, generating a substitution effect. In addition, a series of operational choices – in terms of recruitment, equipment, resource allocation – will impact if the new municipal police can efficiently address the issues of public tranquillity, which also depends on the level of trust and legitimacy recognized by the population.
Mot(s) clé(s)
policing ; municipal police ; public policies ; security ; public tranquillity
2024-14

Reconciling contrasting views on the growth effect of currency undervaluations

Cécile Couharde, Carl Grekou, Valérie Mignon, Florian Morvillier

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Abstract
This paper provides an in-depth analysis of the link between exchange rate misalignments and economic growth for a large sample of 170 countries over the 1973-2019 period. We rely on new cross-country data on multilateral currency misalignments and cross-quantile regressions to demonstrate that the seemingly divergent views of the Washington Consensus and the export-led growth theory on the role of currency undervaluations in promoting economic growth can be reconciled. Although any significant departures from the equilibrium exchange rate levels are found undesirable, we show that undervaluations are more likely to stimulate economic growth in developing countries. However, this positive impact is observed only up to certain thresholds of development level and currency undervaluation. Consequently, strategies in the poorest countries that systematically undervalue currencies in real terms to foster growth should be carefully tailored, as they raise the risk for these economies of switching from a positive to a less favorable growth regime, depending on both their specific wealth level and the extent of their currency undervaluation.
Mot(s) clé(s)
Cross-quantile regressions; economic growth; multilateral currency misalignments; undervaluations.
2024-13

Revisiting 15 Years of Unusual Transatlantic Monetary Policies

José Garcia-Revelo, Grégory Levieuge, Jean-Guillaume Sahuc

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Abstract
The European Central Bank and the Federal Reserve introduced new policy instruments and made changes to their operational frameworks to address the global financial crisis (2008) and the Covid-19 pandemic (2020). We study the macroeconomic effects of these monetary policy evolutions on both sides of the Atlantic Ocean by developing and estimating a tractable two-country dynamic stochastic general equilibrium model. We show that the euro area and the United States faced shocks of different natures, explaining some asynchronous monetary policy measures between 2008 and 2023. However, counterfactual exercises highlight that all conventional and unconventional policies implemented since 2008 have appropriately (i) supported economic growth and (ii) maintained inflation on track in both areas. The exception is the delayed reaction to the inflationary surge during 2021-2022. Furthermore, exchange rate shocks played a significant role in shaping the overall monetary conditions of the two economies.
Mot(s) clé(s)
Monetary policy, real exchange rate dynamics, two-country DSGE model, Bayesian estimation, counterfactual exercises
2024-12

The Hicksian Traverse

Christian Bidard

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Abstract
We consider the disturbances due to the introduction of a new machine in an economy moving on a regular path. Hicks names traverse the intertemporal path leading from the present to another regular path. The dynamics depend on the characteristics of the old and the modern techniques. We simplify and extend Hicks' analysis, which relies on a neo-Austrian model, and show that the conditions for the existence of a full employment traverse are restrictive.
Mot(s) clé(s)
Austran model, technical change, employment, traverse
2024-11

Price controls against “greedflation”: lessons from the debate over incomes policy

Basile Clerc

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Abstract
Why do some economists support price controls in the face of inflation during peacetime? Our thesis is that, in the history of economic thought, understanding the role of profits in inflationary dynamics is the crucial variable. To demonstrate this, we investigate the extensive literature on incomes policy, insofar as much of the thinking on macroeconomic price controls in peacetime is part of this literature. This corpus is crossed by a major schism: some advocate price and wage controls while others limit control to wages alone. We show that the defense of price controls is always based on the thesis that profits play an autonomous role in inflationary dynamics. Conversely, the advocates of an incomes policy reduced to wage controls see margins as mere transmission belts for excessive wage increases into prices. Price controls are thus rejected ex ante, even before any criticism of the consequences of their application.
Mot(s) clé(s)
Price controls - Wage controls - Incomes policy - Inflation - Unemployment
2024-10

Product Liability Influences Incentives for Horizontal Mergers

Andreea Cosnita-Langlais, Tim Friehe, Eric Langlais

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Abstract
This paper shows how product liability rules influence merger incentives. Consumers’ misperception of product risk critically influences which liability rule induces the strongest merger incentives. When consumers overestimate product risk, merger incentives under negligence and strict liability are similar and weaker than under no liability. When consumers underestimate product risk, merger incentives under negligence are weaker than those under strict liability but stronger than those under no liability.
Mot(s) clé(s)
Liability; Merger; Cournot; Market Structure
2024-9

Assessing the Impact of National Air Quality Standards on Agricultural Land Values: Insights from Corn and Soybean Regions

Cécile Couharde, Rémi Generoso

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Abstract
We examine the impact of the National Ambient Air Quality Stan-
dards, as defined by the Clean Air Act, on agricultural land values
within the corn and soybean regions of the United States. To achieve
this objective, agricultural census data on farmland values are com-
bined with pollution exposure metrics as defined by the Environmen-
tal Protection Agency. Using a difference-in-differences approach and
conducting various robustness checks, we find that compliance with air
quality standards has a statistically significant negative effect on agri-
cultural land values at the county level. Moreover, evidence from quan-
tile regression analysis suggests that counties in the lower quantiles fail
to translate the economic and environmental benefits of pollution re-
duction into increased farmland values, unlike their counterparts with
the highest-valued lands.
Mot(s) clé(s)
Air Quality Standards; Agricultural Land Values; Difference- in-Differences; Quantile Regression
2024-8

Économie de guerre climatique : de quoi parle-t-on ?

Alexandre Chirat, Basile Clerc

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Abstract
The concept of a necessary transition to a "war economy" in response to the ecological crisis is gaining traction. However, this discussion often overlooks the fact that a war economy primarily relies on policies such as price controls and rationing, as exemplified by the United States' economy during World War II. Whether it's for wartime efforts or addressing climate urgency, both scenarios seem justifying the suspension of market mechanisms in key sectors to achieve production goals while mitigating the social costs of transition. Nonetheless, a significant disparity lies in the social acceptability of such political measures, which proves to be considerably more challenging to establish within the context of the climate and ecological crisis.
Mot(s) clé(s)
Ecological transition - war economy - price controls
2024-7

Disposition à payer pour l’assurance contre les risques naturels: une étude de terrain au Burkina Faso

Guibril Zerbo

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Abstract
This article examines the determinants of willingness to pay (WTP) for flood insurance, focusing on the role of information and information sources. We use data from a September 2022 field survey of 593 individuals in urban Burkina Faso. We find that 71.3% of individuals are willing to spend money on insurance. But many individuals have a lower willingness to pay than the expected loss. This suggests that individuals would appreciate insurance cover, but do not have sufficient income to pay the insurance premium. We also find that being well informed about flood risk increases the likelihood of paying the expected loss for insurance. However, obtaining flood information from television increases WTP whereas radio does not. These results suggest the need to take information sources into account when developing effective communication policies against these risks. Another result is that recourse to the family and risk aversion reduce PAD. Finally, trust in insurers and ambiguity aversion increase individuals' chances of paying the expected loss for insurance.
Mot(s) clé(s)
Natural disasters, Flood risk; Insurance, Willingness to pay; Information
2024-6

Moving apart: job-driven residential mobility and the gender pay gap Evidence from a large industrial firm.

Matthieu Bunel, Dominique Meurs, Élisabeth Tovar

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Abstract
This article uses a 15-year panel data set from a large French industrial firm to investigate the role of intra-firm job-driven residential mobility on the gender pay gap of executives. We find that job-driven residential mobility is highly profitable for both male and female workers due to a generous mobility bonus policy, but that it does not affect their careers. We also find that female executives are less likely than males to experience job-driven residential mobility, and that it brings higher gains to male relative to female executives. However, these differences between men and women linked to the mobility allowance make limited contribution to the total gender pay gap, which is almost entirely due to other bonuses linked to the positions held.
Mot(s) clé(s)
insider econometrics, personnel economics, gender pay gap, job mobility, residential mobility
2024-5

Gender Differences in Early Occupational Choices: Evidence from Medical Specialty Selection

Josep Amer-Mestre, Noémi Berlin, Agnès Charpin, Magali Dumontet

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Abstract
This paper analyses gender differences in occupational choices in a setting in which observed matches are solely determined by supply-side factors: the French centralised medical residency selection mechanism. We show that men and women facing the same occupational choice set make drastically different occupational choices. Medical specialties selected by women pay less, have lower time requirements, and are less competitive. To understand these differences and estimate how much of the gender gap in specialty sorting can be explained by individual preferences for job attributes, we administer a survey to prospective medical residents just before their specialty choice. Using both a hypothetical job choice framework and stated preferences, we show that while “hard” job characteristics (earnings, time requirements) only slightly reduce the gender gap in sorting, “soft” characteristics (daily tasks, contact with patients, willingness to help others) play a larger role in reducing the gap. We also find suggestive evidence of an anticipation effect of fertility on women’s career choices. Our results suggest that individual preferences play a determinant role in explaining gender-based occupational segregation.
Mot(s) clé(s)
Occupational segregation, Gender, Labour market, Job attributes, Willingness to pay
2024-4

Global Value Chains and Productivity: Causal Evidence for Firms Worldwide

Ivan Ledezma, Antonia Lopez Villavicencio

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Abstract
We study how global value chain participation causally affects productivity at the firm level. We utilize an extensive dataset encompassing firms from countries of different income levels over the period 2006-2021, together with matching approaches to control for endogeneity. Our primary finding underscores that the simultaneous coordination of importing and exporting activities within a single firm leads to an increase in labor productivity. Positive effects on TFP are significant only within the subgroup of firms in the less developed countries and those operating in low-tech industries. Increased capital intensity appears as a plausible explanation of labor productivity gains. We also find higher innovation propensity, quality enhancements, and labor-cost reductions for two-way traders as channels through which GVC participation influences firms' technical change. The lower responsiveness of TFP in advanced countries can be explained by the different nature of technical change for firms operating closer to the world technology frontier.
Mot(s) clé(s)
Global value chains, productivity, firm, development, endogeneity
2024-3

Evaluating criticality of strategic metals: Are the Herfindahl–Hirschman Index and usual concentration thresholds still relevant?

Pauline Bucciarelli, Emmanuel Hache, Valérie Mignon

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Abstract
This paper aims to evaluate the criticality of strategic metals by (i) investigating the validity of the Herfindahl-Hirschman Index (HHI) for assessing the supply risk aspect of criticality and (ii) determining an appropriate threshold for using this indicator in the context of criticality studies. Relying on a large panel of 33 strategic metals over the 1995-2021 period, our findings show that the variation of HHI has more impact on metal prices at lower HHI levels and question the existence of a threshold that clearly distinguishes high-risk markets from less risky ones based on their concentration levels. Overall, we show that using the HHI as a supply risk indicator, especially in conjunction with a threshold, may result in underestimating risks in less concentrated markets.
Mot(s) clé(s)
Strategic metals; Criticality; Herfindahl–Hirschman Index; Metal prices; Panel regression
2024-2

Que nous apprennent les fichiers SISE au sujet des inégalités de réussite dans l'enseignement supérieur ?

Guillaume Pierné

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Abstract
This study offers a cross sectional assessment of inequalities of success related to gender, nationality and socio professional category in higher education. To this purpose, it uses the exhaustiveness of the data contained in the files of the student monitoring information system for the year 2017-2018. On the basis of meta-regressions, the results suggest that inequalities of success are generalized across subjects and educational establishments, that they are stronger in the first years of training and in medical fields and that their magnitude may vary with the demographic composition of the group of attending students , in particular with the share of students belonging to the references demographic groups
Mot(s) clé(s)
inequalities, academic success, higher education, meta analysis
2024-1

Synergy in environmental compliance, innovation and export on SMEs' growth

Phu Nguyen-Van, Tuyen Tiet, Quoc Tran-Nam

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Abstract
Although numerous studies examine the impacts of environmental compliance and innovation on a firm's economic performance, the role of export activities in this nexus has remained unanswered. In this study, we revisit the Porter hypothesis by investigating synergy strategies of dierent environmental and economic practices (i.e., environmental compliance, product innovation, process innovation and having export activities) on total factor productivity (TFP) of Vietnamese manufacturing SMEs. Our results suggest that while encouraging either product or process innovation is also essential in the environment-promoting policy, joint implementation of these two practices should be carefully considered by managers. Moreover, entering export markets positively impacts rms' productivity; complying with the domestic/local environmental standards could signicantly increase the chances for SMEs to enter the export markets
Mot(s) clé(s)
Environmental compliance; Export; Product innovation; Process innovation; Productivity; SMEs
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