Publications

La plupart des informations présentées ci-dessous ont été récupérées via RePEc avec l'aimable autorisation de Christian Zimmermann
Conditions necessary for the sustainability of an emerging area: The importance of banking and financial regional criteriaJournal articleCéline Gimet, Journal of Multinational Financial Management, Volume 17, Issue 4, pp. 317-335, Forthcoming

The last financial crises have revealed the vulnerability of many emerging countries. Yet, within an economically integrated area, some groups of countries have been spared the disastrous consequences of these crises. The purpose of this article is to underline the similarities between these countries in order to draw up a set of regional criteria that would protect an area against speculative attacks. Using a probit analysis, we show that the convergence of some banking and financial indicators towards reference levels guarantees the confidence of international lenders, which in turn limits financial contagion. A narrow margin between the amount of external debt, in particular the short-term debt of the country and a reference level constitutes a protection against the risk of illiquidity. Similarly, a low domestic credit in comparison with the international reserves of the economy is also an indicator of the sustainability of an area for international lenders that ensures its stock exchange stability.

The impacts of standard monetary and budgetary policies on liquidity and financial markets: International evidence from the credit freeze crisisJournal articleMarie-Hélène Gagnon et Céline Gimet, Journal of Banking & Finance, Volume 37, Issue 11, pp. 4599-4614, Forthcoming

This paper evaluates the domestic and international impacts of lowering short-term interest rates and increasing budget spending on several indicators of liquidity, volatility, credit and economic activity. Data from the 2003–2011 period in the United States, the Euro zone and Canada were used to develop two SVAR models for assessing the national effectiveness and the international spillovers of monetary and budgetary policies during the credit freeze crisis. While monetary policies caused a temporary decrease in volatility and increase in liquidity in North American stock markets, the shocks were mainly domestic and ineffective at generating liquidity in the banking sector. In contrast, government spending shocks had a positive impact on credit and consumption, especially in Europe and Canada. Moreover, budgetary policies also had a positive international spillover effect on consumption and credit, especially for smaller economies such as Canada.

Endogenous Fragility in Microfinance: Evidence from IndiaBook chapterCéline Gimet et Thomas Lagoarde-Segot, May 21, 2013, pp. 63-88, IMPERIAL COLLEGE PRESS, Forthcoming
Public–private differentials in health care delivery: the case of cesarean deliveries in AlgeriaJournal articleAhcène Zehnati, Mârwan-al-Qays Bousmah et Mohammad Abu-Zaineh, International Journal of Health Economics and Management, Forthcoming

Akin to other developing countries, Algeria has witnessed an increasing role of the private health sector in the past two decades. Our study sheds light on the public–private overlap and the phenomenon of physician dual practice in the provision of health care services using the particular case of cesarean deliveries in Algeria. Existing studies have reported that, compared to the public sector, delivering in a private health facility increases the risk of enduring a cesarean section. While confirming this result for the case of Algeria, our study also reveals the existence of public–private differentials in the effect of medical variables on the probability of cesarean delivery. After controlling for selection in both sectors, we show that cesarean deliveries in the private sector tend to be less medically justified compared with those taking place in the public sector, thus, potentially leading to maternal and neonatal health problems. As elsewhere, the contribution of the private health sector to the unmet need for health care in Algeria hinges on an appropriate legal framework that better coordinates the activities of the two sectors and reinforces their complementarity.

To Give or Not to Give? How Do Other Donors React to European Food Aid Allocation?Journal articleNathalie Ferrière, The European Journal of Development Research, Forthcoming

Using a change in EU food aid policy in 1996 as an instrument for EU food aid allocation, I investigate how other donors react to the EU’s food aid allocation. At that time, the EU suddenly divided by two the number of its food aid recipients. On average, other donors imitate the EU at both extensive and intensive margins. Donors’ reactions are heterogeneous: European countries and Canada herd the EU, while the World Food Programme substitutes. The USA do not react. Those results can be explained by competition for relative impact and information effects. For a recipient country who constantly received food aid from the EU before 1996, the number of donors decreases by almost 0.5. This behavior reinforces the problem of orphan and darling recipients.

The French school of proximity – Genesis and evolution of a school of thoughtBook chapterJean-Benoît Zimmermann, André Torre et Michel Grossetti, A. Torre et D. Galaud (Eds.), Forthcoming

In this chapter, we revisit the origins and genesis of the french school of proximity and its evolution trough time, in order to better understand how and why the small group of researchers who were the driving force of this new way of thinking were quickly able to get a real legitimacy and effective recognition. First of all, it was clear that the role of space in economic dynamics was too often the subject of confusion and abusive assertions. Asking this question in terms of coordination made it possible to consider non-spatial factors in the analysis. The notion of proximity as a polysemic concept therefore opened the way to understanding how space matters or not, together with these other factors thus a renewed approach of questions related to space and territories. But, even starting from issues of economic nature, such an approach could not remain limited to its economic dimension, the questions of coordination involving social individuals, located in geographical space but also embedded in bundles of relationships and in institutions. Thus, it had to broaden very quickly to other disciplines in social sciences which largely contributed to consolidate the bases of what became a multidisciplinary approach and to develop theoretical as well as empirical tools.

The impact of ICTs and digitalization on productivity and labor share: evidence from French firmsJournal articleGilbert Cette, Sandra Nevoux et Loriane Py, Economics of Innovation and New Technology, pp. 1-24, Forthcoming

Taking advantage of an original firm-level survey carried out by the Banque de France, we empirically investigate how the employment of ICT specialists (in-house and external) and the use of digital technologies (cloud and big data) have an impact on firm productivity and labor share. Our analysis relies on the survey responses in 2018 of 1,065 French firms belonging to the manufacturing sector and with at least 20 employees. To tackle potential endogeneity issues, we adopt an instrumental variable approach as proposed by Bartik (1991, Who Benefits from State and Local Economic Development Policies? Kalamazoo, MI: W.E. Upjohn Institute for Employment Research.). The results of our cross-section estimations point to a large effect: ceteris paribus, the employment of ICT specialists and the use of digital technologies improve a firm’s labor productivity by about 23% and its total factor productivity by about 17%. Conversely, the employment of in-house ICT specialists and the use of big data both have a detrimental impact on labor share, of about 2.5 percentage points respectively.

Approachability with constraintsJournal articleGaëtan Fournier, Eden Kuperwasser, Orin Munk, Eilon Solan et Avishay Weinbaum, European Journal of Operational Research, Forthcoming

We study approachability theory in the presence of constraints. Given a repeated game with vector payoffs, we study the pairs of sets (A,D) in the payoff space such that Player 1 can guarantee that the long-run average payoff converges to the set A, while the average payoff always remains in D. We provide a full characterization of these pairs when D is convex and open, and a sufficient condition when D is not convex.

Reducing Inequalities Among UnequalsJournal articleMathieu Faure et Nicolas Gravel, International Economic Review, Volume n/a, Issue n/a, Forthcoming

This article establishes an equivalence between four incomplete rankings of distributions of income among agents who are vertically differentiated with respect to some nonincome characteristic (health, household size, etc.). The first ranking is the possibility of going from one distribution to the other by a finite sequence of income transfers from richer and more highly ranked agents to poorer and less highly ranked ones. The second ranking is the unanimity among utilitarian planners who assume that agents' marginal utility of income is decreasing with respect to both income and the source of vertical differentiation. The third ranking is the Bourguignon (Journal of Econometrics, 42 (1989), 67-80) Ordered Poverty Gap dominance criterion. The fourth ranking is a new dominance criterion based on cumulative lowest incomes.

A new regularization of equilibrium problems on Hadamard manifolds. Applications to theories of desiresJournal articleJr. P. A. Soares, J.X. Cruz Neto, G. C. Bento et Antoine Soubeyran, Annals of Operations Research, Forthcoming