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Dans cette etude, nous quantifions et analysons la dependance dynamique entre les rendements du marche des bitcoins aux Etats-Unis, dans la zone euro, au Royaume-Uni et au Japon et l’inflation realisee et inattendue, sous reserve de differents etats du marche et de diverses nuances d’inflation. En utilisant une regression quantile sur quantile, nous etudions les proprietes de couverture du bitcoin contre l’inflation, offrant ainsi un nouveau regard sur le puzzle du retour de l’inflation du point de vue des investissements alternatifs. Nous constatons que tandis que les marches haussiers du Royaume-Uni, de l’euro et du bitcoin japonais facilitent la couverture contre l’inflation en offrant des rendements plus eleves, le marche du bitcoin USD se comporte moins bien avec l’inflation. En general, nos resultats indiquent une relation asymetrique entre l’inflation, a la fois realisee et inattendue, et les investissements alternatifs tels que le marche du bitcoin.

International audience; We assess the role of demand noise (excessive optimism or pessimism about demand) together with supply noise (excessive optimism or pessimism about supply). To do so, we propose a methodology to decompose business cycles into supply, demand, supply noise and demand noise shocks, using a structural vector autoregression model. Key to our identification of both supply noise and demand noise is the use of sign restrictions on survey expectation errors about output growth and about inflation. We show that demand-related noise shocks have a negative effect on output and contribute substantially to its fluctuations. Monetary policy and private information seem to play a key role in the transmission of demand noise shocks.

This paper argues that the 100% money proposal of the 1930s should not (as is often the case) simply be considered as an avatar, extended to deposit currency, of the Currency School’s reform prescr...

This chapter discusses facts, methods and empirical results that pertain to poverty measurement under income and price dispersions. The correlation of prices and living standards is examined, and its origins are considered, in terms of whether such origins are related to consumer preferences, economic interactions and market imperfections. Then, the relationship of price dispersion and aggregate social indicators-including poverty measures-is analysed by combining stochastic hypotheses about prices and incomes with normative properties of social and poverty indicators. Finally, empirical results about how dispersed heterogeneous price indices affect poverty measurement, anti-poverty targeting and poverty-alleviation price reforms are reviewed.

We analyse the elasticity of the household consumption expenditure (HCE) deflator to the exchange rate, using world input-output tables (WIOT) from 1995 to 2019. In line with the existing literature, we find a modest output-weighted elasticity of around 0.1. This elasticity is stable over time but heterogeneous across countries, ranging from 0.05 to 0.22. Such heterogeneity mainly reflects differences in foreign product content of consumption and intermediate products. Direct effects through imported consumption and intermediate products entering domestic production explain most of the transmission of an exchange rate appreciation to domestic prices. By contrast, indirect effects linked to participation in global value chains play a limited role. Our results are robust to using four different WIOT datasets. As WIOT are data-demanding and available with a lag of several years, we extrapolate a reliable estimate of the HCE deflator elasticity from 2015 onwards using trade data and GDP statistics.

La présente étude évalue l'impact de la coordination des politiques monétaire et budgétaire sur la stabilité du niveau général des prix dans le contexte de la République Démocratique du Congo de 1990 à 2019. Notre investigation empirique porte sur la RDC entre 1990 et 2019, et fait appel au modèle VAR. Les résultats ont montré l'existence de cette coordination durant quelques années. Aussi, cette coordination présente des effets positifs sur la stabilité du niveau général des prix. Ces preuves suggèrent que la Banque Centrale du Congo (BCC) doit travailler d'arrache-pied avec le gouvernement congolais pour assurer la stabilité du niveau général des prix.

Following the 2008 financial crisis, inflation rates in advanced economies have been at odds with the prediction of a standard Phillips curve. This puzzle has triggered a debate on the global determinants of domestic prices. We contribute to this debate by investigating the impact of exchange rate shocks on consumer prices from 1995 to 2018. We focus on cost-push inflation through global value chains. We build on three sectoral world input-output datasets (WIOD and two versions of TiVA). We assume a Cobb-Douglas production framework and work in a partial equilibrium setting. The construction of World Input-Output tables is data-demanding and WIOTs are typically released with a lag of several years. To address this gap, we use more up-to-date GDP and trade data, thus providing a tool for approximating the partial equilibrium impact of an exchange rate shock on consumer prices from 2015 onwards. Depending on countries, the absolute value of the elasticity of the household consumption expenditure (HCE) deflator to the exchange rate ranges from 0.05 to 0.35, confirming the importance of global value chains in channelling external shocks to domestic inflation. Using data from WIOD on a sample of 43 countries, we find that the mean output-weighted elasticity of the HCE deflator to the exchange rate increased in absolute value from 0.075 in 2000 to 0.094 in 2008. After peaking in 2008, it declined to 0.088 in 2014. Extrapolations based on more up-to-date GDP and trade data suggest that the decline continued until 2016, before reversing in 2017 and 2018. Our findings are robust to using three different datasets.

Following the 2008 financial crisis, inflation rates in advanced economies have been at odds with the prediction of a standard Phillips curve. This puzzle has triggered a debate on the global determinants of domestic prices. We contribute to this debate by investigating the impact of exchange rate shocks on consumer prices from 1995 to 2018. We focus on cost-push inflation through global value chains, using three sectoral world input-output datasets. Depending on countries, the absolute value of the elasticity of the household consumption expenditure (HCE hereafter) deflator to the exchange rate ranges from 0.05 to 0.35, confirming the importance of global value chains in channelling external shocks to domestic inflation. Using data from WIOD on a sample of 43 countries, we find that the mean output-weighted elasticity of the HCE deflator to the exchange rate increased in absolute value from 0.075 in 2000 to 0.094 in 2008. After peaking in 2008, it declined to 0.088 in 2014. World Input-Output tables (WIOT hereafter) are released with a lag of several years and the latest WIOT dates back to 2015. To fill this gap, we approximate the impact of an exchange rate shock on the HCE deflator from 2016 onwards using up-to -date GDP and trade data. Our extrapolations suggest that the decline in the elasticity of the HCE deflator continued until 2016, before reversing in 2017 and 2018. Our findings are robust to using three different datasets.

We study the monetary-fiscal mix in the European Monetary Union. The medium and long-run effects of conventional and unconventional monetary policy are analysed by combining monetary policy shocks identified in a Structural VAR, and the general government budget constraint featuring a single central bank and multiple fiscal authorities. In response to a conventional easing of the policy rate, the cumulated response of the fiscal deficit is positive. Conversely, in response to an unconventional easing affecting the long end of the yield curve, the primary fiscal position barely moves. This is consistent with the long-run effect of unconventional monetary easing on the price index, which is about half that of conventional easing. The aggregate long-run cumulated surplus is mainly driven by Germany’s fiscal policy during the period in which unconventional monetary policy was adopted.

We analyze the economic growth under impact of public and foreign investment by a vector autogressive model (VAR) on a quarterly sample of Vietnam economy over 2008-2020. The method stresses the role of exchange rate and liquidity supply on context of open economy. The evidence records that there exists a synergy of public and foreign investment on raising economic growth, reducing inflation and evaluating domestic currency. Moreover, the public investment is crucial to combat economic recession, especially during the current pandemic Covid-19.

International audience; We use micro level retail price data from convenience stores to study the link between 0-ending price points and price rigidity during a period of a runaway inflation, when the annual inflation rate was in the range of 60%-430%. Surprisingly, we find that 0-ending prices are less likely to adjust, and when they do adjust, the average adjustments are larger. These findings suggest that price adjustment barriers associated with round prices are strong enough to cause a systematic delay in price adjustments even in a period of a runaway inflation, when 85 percent of the prices change every month.

Over the past decade, remittances to Tunisia have increased significantly. Meantime, the Tunisian economy has grown by as little as 0.6 percent on average with inflation averaging six percent. With the harmful economic and social consequences of the COVID-19 crisis as well as the political unrest (especially after Tunisian President Kais Saied invoked Article 80 of the country's 2014 constitution to suspend parliament amid nationwide protests calling for the resignation of the government and the dissolution of the parliament), managing inflation risks seems growingly challenging. Our study is the first attempt to examine the relationship between remittances and Tunisia's inflation dynamics in the central and tail distributions over different correlation regimes. Particularly, we use a copula-based approach that sheds a new light on the dynamic dependence between inflation and remittances. This technique allows to control for possible asymmetries in the form of a high or crisis dependence and a low or a normal state dependence. Our results robustly reveal that remittances are prominent factor determining inflation in Tunisia. More interestingly, we show that remittances and inflation are more strongly correlated during high uncertainty conditions rather than low uncertainty regime. Such accurate insights on the dynamic relationship between remittances and inflation would allow the central bank to anticipate more effectively the evolution of inflation and to propose more appropriate instruments to control it in a context of high inflationary pressures and heightened political uncertainty.

The article proposes a typology of inflation regimes that can be applied to any kind of economy based on the Post-Keynesian and structuralist literature. We identify three separate regimes: the low, moderate, and high inflation regimes. Hyperinflation is also defined and described. Each regime presents different characteristics. We identify the key role played by the distributive conflict between workers and capitalists in all the regimes, the role played by the indexation of wages on domestic prices in the moderate and high inflation regimes, and the specific roles played by the widespread indexation on a short term basis in the high inflation regime. Hyperinflation is explained by selffulfilling prophecies about exchange rate variations and by the rejection of the domestic currency. Our analysis underlines the fact that the current fear of inflation is largely groundless.

A policy target (for example inflation) may depend on the persistent component of exogenous shocks, such as the cost-push shock of oil, energy or imported prices. The larger the persistence of these exogenous shocks, the larger the welfare losses and the larger the response of policy instrument to this exogenous shock in a feedback rule, in order to decrease the sensitivity of the policy target to this shock.

This paper argues that central bankers should raise inflation to signal their credibility to forward guidance policies. As inflation can be stabilized in normal times either because of central banker's credibility (e.g. because of reputation concerns) or because of his aversion to inflation, the private sector is unable to infer the central banker's type from observing stable inflation before a liquidity trap, jeopardizing the efficiency of forward guidance policy. We derive optimal policy in a new-Keynesian model subject to liquidity traps where agents are uncertain about the central banker's type and we show that the credible central banker can signal his type by raising inflation before a trap. We show that this signaling motive can justify level of inflation well above 2% but also that the low inflation volatility during the Great Moderation was insufficient to ensure fully efficient forward guidance when needed.

International audience; This article studies contagion effects between traditional financial markets, represented by five equity indices and the EUR, USD, GBP, and JPY centralized Bitcoin markets. We apply a regime switching skew-normal model of asset returns that distinguishes between linear and non-linear contagion and also structural breaks in the periods. We find significant contagion effects from financial to Bitcoin markets in terms of both correlation and co-skewness of market returns. Our results also indicate that during crisis periods, risk-averse investors tend to move away from risky Bitcoin markets towards safer financial markets.

International audience; Prices that end with 9, also known as psychological price points, are common, comprising about 70% of the retail prices. They are also more rigid than other prices. We take advantage of a natural experiment to document an emergence of a new price ending that has the same effects as 9-endings. In January 2014, the Israeli government passed a new regulation prohibiting the use of non 0-ending prices, bringing an end to 9-ending prices. We find that seven months after 9-ending prices have disappeared, 90-ending prices acquired the same status as 9-ending prices had before the new regulation was adopted. Thus, 90-ending prices became the new psychological price points, partially eliminating the regulation’s intended effect.

International audience; The aim of the present paper is to provide criteria for a central bank of how to chooseamong different monetary-policy rules when caring about a number of policy targetssuch as the output gap and expected inflation. Special attention is given to the questionif policy instruments are predetermined or only forward looking. Using the new-Keynesian Phillips curve with a cost-push-shock policy-transmission mechanism, theforward-looking case implies an extreme lack of robustness and of credibility of stabi-lization policy. The backward-looking case is such that the simple-rule parameters canbe the solution of Ramsey optimal policy under limited commitment. As a conse-quence, we suggest to model explicitly the rational behavior of the policy maker with Ramsey optimal policy, rather than to use simple rules with an ambiguous assumptionleading to policy advice that is neither robust nor credible.; Cette article propose des critères de choix par une banque centrale entre différentes règles de politique monétaire réagissant à l’inflation. Une attention particulière est portée sur la nature non-prédéterminée ou prédéterminée des instruments de politique monétaire. En prenant l’exemple d’une courbe de Phillips des nouveaux Keynésiens, un instrument non-prédéterminé lorsque l’inflation est aussi non-prédéterminée implique un manque extrême de crédibilité et de robustesse de l’ancrage et de la stabilisation des prix, dès lors que la banque centrale ne connaît pas exactement les paramètres de l’économie. En revanche, un instrument prédéterminé est tel qu’une règle proportionnelle ancre l’inflation non-prédéterminée de manière robuste et crédible. Cette règle peut alors être une forme réduite d’une politique optimale à la Ramsey avec un minimum de crédibilité et de robustesse. Nous recommandons de modéliser des politique optimales avec un minimum de crédibilité de la banque centrale plutôt qu’avec des règles proportionnelles en supposant non-prédéterminés à la fois les instruments et les cibles de la politique monétaire.

This paper is the outcome of a joint research project by the Institute of Economic Research, Hitotsubashi University, the New Supermarket Association of Japan, and INTAGE Inc. We are grateful for comments from participants at the Hosono Project Meeting at RIETI and Innovation Economics Workshop in the institute of innovation research, Hitotsubashi University. This work was supported by JSPS Grant-in-Aid for Scientific Research C (Research Project Number: 15K03349). And, this joint research was also supported by FFJ, EHESS, Paris, France. Authors would like to thank Prof. Sébastien LECHEVALIER and the all member of FFJ EHESS.; This study empirically investigates the impact of research and development (R&D) activity on product turnover from Point-of-Sales (POS) data. When measuring the inflation rate in an economy, the effects of quantitative changes, volume changes, and quality changes from nominal sales changes must be removed. In order to examine the effect of R&D activities on price changes from sales data, we implement an empirical combining three datasets: weekly POS data, patent database (IIP Patent DB) data, and Survey of Research and Development data. We use regression analysis with pooling and panel regression. We observe that while the effect of price increases due to the new product introduction can be related to R&D behavior a negative effect on the price of the incumbent product is also observed. In addition, the relative prices of new and incumbent products tended to be higher for companies with active R&D expenditures. We suggest that continuous R&D is necessary to keep introducing high value products while prices are under pressure.

International audience Empirical evidence shows monetary shocks have two temporary effects on the distribution of prices. One, the dispersion of cross-section of prices increases in response to monetary shocks. Two, some prices change in the ‘wrong’ direction: some prices decrease in response to positive monetary shocks, and increase in response to negative monetary shocks. We present a model that generates the two effects of monetary shocks on the distribution of prices as an out-of-equilibrium phenomena. Firms are related to each other through a production network. Monetary shocks change the working capital of a subset of firms and percolate to other firms through buyer-seller linkages. Price dispersion increases because the percolation of a monetary shock through the production network causes prices to differentially deviate from their steady state values. Some prices change in the wrong direction because a shift in one firm’s demand causes a shift in another firm’s supply (and vice-versa), thereby generating complicated chains of bi-directional price changes. Monetary shocks can significantly disturb relative prices even when all prices are fully flexible.

The relative importance of survey-based, VAR-based or myopic expectations is evaluated in accounting for US inflation dynamics in a New Keynesian Phillips Curve (NKPC) setting. Our contribution is threefold. First, we estimate the NKPC with both final and real-time vintage data in order to control for large revisions in the real GDP data. Second, we distinguish between two different series for VAR-based inflation forecasts-derived by a recursive or rolling-window method-to account for changes in the conduct and transmission mechanisms of US monetary policy after World War II. Third, joint restrictions are tested in the NKPC to assess whether one of the expectational variables is able, on its own, to capture inflation dynamics. On a statistical basis, we find that there is no clear-cut winner between VAR-and survey-based inflation expectations. Most of our estimated NKPC variants conclude that survey inflation expectations tend to have the largest numerical weight. Nevertheless, the difference between VAR-and survey-based expectations' estimated coefficients is not statistically significant. Moreover, myopic expectations do not play any significant role in the majority of the estimated NKPC variants.

The relative importance of survey-based, VAR-based or myopic expectations is evaluated in accounting for US inflation dynamics in a New Keynesian Phillips Curve (NKPC) setting. Our contribution is threefold. First, we estimate the NKPC with both final and real-time vintage data in order to control for large revisions in the real GDP data. Second, we distinguish between two different series for VAR-based inflation forecasts—derived by a recursive or rolling-window method—to account for changes in the conduct and transmission mechanisms of US monetary policy after World War II. Third, joint restrictions are tested in the NKPC to assess whether one of the expectational variables is able, on its own, to capture inflation dynamics. On a statistical basis, we find that there is no clear-cut winner between VAR- and survey-based inflation expectations. Most of our estimated NKPC variants conclude that survey inflation expectations tend to have the largest numerical weight. Nevertheless, the difference between VAR- and survey-based expectations’ estimated coefficients is not statistically significant. Moreover, myopic expectations do not play any significant role in the majority of the estimated NKPC variants.

International audience; The aim of the study is to investigate the impact of oil prices on the stock market of G7 countries. Oil prices not only affect the economy of a country but also the country's stock market. The stock market affects the stock valuation or, to put in another way, the company's stock value. The stock value is associated with the discounted sum of predictable future cash flows and these flows may be distressed by macroeconomic variables including oil prices fluctuations. This study has researched the impact of oil prices' fluctuation on countries included G7, i.e.. For the analysis, the most recent data is collected. In this study, the real stock return has considered as a depended variable or predict variable, while oil prices, industrial production, and short-term interest rate are as independent, or predictor variables. The study is quantitative in nature. All data was collected from OECD website with the exception of oil prices, which were taken from oil intelligence report. The model, which has been used in the study is based on Arbitrage pricing theory-APT model, where financial assets are associated with macroeconomic variables. The results showed that Industrial production is positively associated with a real stock return in the case of Germany, Italy, Japan, the United Kingdom, and France, while the short-term interest rate is negatively connected with a real stock return in the case of Canada, the United Kingdom, and United States of America. Oil prices have an insignificant effect on real stock markets of all considered countries. The authors provide an economic interpretation of the obtained results.

International audience; This paper estimates the effects of different forms of inflation targeting (IT) in the exchange rate pass-through (ERPT). To this end, we first estimate the ERPT for a large sample of countries using state-space models. We then consider the adoption of an inflation targeting framework by a country as a treatment to find suitable counterfactuals to the actual targeters. By controlling for self-selection bias and endogeneity of the monetary policy regime, we confirm that the ERPT tends to be lower for countries adopting explicit IT. However, we uncover that older regimes, adopting a range or point with tolerance band and keeping inflation close to the target, outperform other IT regimes. We also show that IT is effective even with a relatively high inflation target or low central bank independence.

This study attempts to establish the possible existence of the long-run interrelationship between interest rates, inflation, and exchange rates in five fragile emerging market economies (Brazil, India, Indonesia, South Africa, and Turkey), what is so-called by Morgan Stanley ‘Fragile Five’. To do so, we utilize Li and Lee’s (2010) Autoregressive Distributed Lag (ADL) test for threshold cointegration and apply it to sample countries’ monthly time-series data from 2013:1 to 2018:12. Overall, our primary results are threefold: First, there seems to be a long-run positive relationship between actual rates of inflation rates and nominal interest rates supporting the validity of the ex-post Fisher hypothesis for all the sample countries. Second, the sample countries’ data supports the presence of a cointegration relationship between interest rates and exchange rates for the case of Brazil, India, and Turkey but not for the case of Indonesia and South Africa. Lastly, without exception, exchange rates and actual rates of inflation in all the sample countries examined tend to co-move in the long-run, implying that the depreciation of their currencies creates inflation through raising the prices of imported goods. The results above are widely compatible with both theoretical expectations and the results of the most previous empirical studies on the long-run interrelationships between interest rates, inflation, and exchange rates in the literature.

International audience; This study seeks to address whether Bitcoin ever match or even replace gold as a safe haven. To this end, we use a dynamic Markov-switching copula model to test the complementarity and substitutability among Bitcoin and gold within two risk scenarios (i.e., low-and high-risk regimes). Our results reveal a positive and strong correlation between gold and Bitcoin returns coinciding with specific economic and political events. Gold and Bitcoin benefit from the same economic conditions. This suggests that gold and Bitcoin are likely to be complementary, rather than in competition with each other. Gold could act as a diversifier for investors in digital assets. But the Bitcoin have a lot to teach gold in terms of the efficient transfer of value.

International audience; Market heterogeneity may affect the distributional incidence of soft-drink taxes if households sortby income across markets with different characteristics. We use the Kantar Worldpanel homescandata to analyse the distributional incidence of the 2012 French soda tax on Exact Price Indices (EPIs)that measure consumer welfare from the price, availability and consumption of Sugar-SweetenedBeverages (SSBs) at a local market level. After correcting prices for consumer heterogeneity inpreferences, we find that the soda tax had a significant but small national average impact corres-ponding to a pass-through of approximately 40%. Producers and retailers set significantly higherpass-throughs in low-income, less-competitive and smaller markets and for cheaper but less popularbrands. Market heterogeneity ultimately has substantial distributional effects, as it accounts forapproximately 35% of the difference in welfare variation between low- and high-income consumers.

International audience; Even though the empirical literature on safe haven properties of different assets with respect to financial risks is increasing, their abilities to safeguard against political risks has not been the subject of large empirical investigations. This paper uses an Empirical Mode Decomposition-based approach to look into the time-varying role of different assets (in particular, oil, precious metals and Bitcoin) as a safe haven against U.S. stocks in times of heightened uncertainty surrounding the outcome of the 2016 U.S. presidential election. Our results suggest that oil can act as an effective safe haven against political risk exposure; but such property varies over time. The abilities of gold and silver to provide positive returns during downturns have been also documented in the medium-and the long-term. Bitcoin also serves as a safe haven against U.S. stock losses but in the short-term. These findings provide useful and relevant information to investors to help ensure better asset allocation in an uncertain environment.

This paper performs a comparison of the Taylor Rule and Nominal GDP Targeting by estimating a DSGE model with Bayesian techniques. The first part builds a New Keynesian DSGE model with investment adjustment costs, prices and real wages rigidities, a government sector, and imperfect competition, alongside various shocks. The second part estimates and contrasts the models using Bayesian methods on Euro Area data. The results show that the data strongly prefer the Nominal GDP Targeting Rule over the Taylor Rule. We conduct numerous robustness checks to guarantee the solidity of our results. We also provide impulse response functions evaluation of the two Monetary Policy Rules.

Using real equilibrium exchange rate modelling, we quantify adjustments within the euro area compatible with a current account equilibrium and a stabilisation of the net external positions of t he euro area countries. Our estimates indicate that the imbalances have shrunk since 2008, but substantial misalignments remain, and the average (absolute) mismatch relative to the euro price level amounts to 10% in 2017. The imbalances now weigh on the external equilibrium of the euro area and are increasing the risk of a medium -term appreciation in the euro. These results are robust to hypotheses on the horizon of adjustment, potential growth, output gaps and real interest rates.

International audience We develop a tractable model of price dynamics in a general equilibrium economy with cash-in-advance constraints. The dynamics emerge from local interactions between firms that are governed by the production network underlying the economy. We analytically characterise the influence of network structure on the propagation of monetary shocks. In the long run, the model converges to general equilibrium and the quantity theory of money holds. In the short run, monetary shocks propagate upstream via nominal changes in demand and downstream via real changes in supply. Lags in the evolution of supply and demand at the micro level can give rise to arbitrary dynamics of the distribution of prices. Our model provides an explanation of the price puzzle: a temporary rise in the price level in response to monetary contractions. In our setting, the puzzle emerges under two assumptions about downstream firms: they are disproportionally affected by monetary contractions and they account for a sufficiently small share of the wage bill. Empirical evidence supports the two assumptions for the US economy. Our model calibrated to the US economy using a data set of more than fifty thousand firms generates the empirically observed magnitude of the price level rise after monetary contractions.

International audience; This paper analyzes the role of money and monetary policy as well as the forecasting performance of New Keynesian dynamic stochastic general equilibrium models with and without separability between consumption and money. The study is conducted over three crisis periods in the Eurozone, namely, the ERM crisis, the dot-com crisis, and the global financial crisis (GFC). The results of successive Bayesian estimations demonstrate that during these crises, the non-separable model generally provides better out-of-sample output forecasts than the baseline model. We also demonstrate that money shocks have some impact on output variations during crises, especially in the case of the GFC. Furthermore, the response of output to a money shock is more persistent during the GFC than during the other crises. The impact of monetary policy also changes during crises. Insofar as the GFC is concerned, this impact increases at the beginning of the crisis, but decreases sharply thereafter.

International audience

The determinacy of dynamic stochastic general equilibrium models including fiscal, macro-prudential or Taylor rules relies on the assumption that policy instruments are forward-looking when policy targets are also forward-looking. Blanchard and Kahn (1980) determinacy condition does not forbid to assume that policy instruments are backward-looking when policy targets are forward-looking, as it is the case for Ramsey optimal policy under quasi-commitment. There is indeterminacy of determinacy unless six criteria are considered which are in favor of assuming that policy instruments are backward-looking when policy targets are forward-looking.

International audience; This study assesses the roles of Bitcoin as a hedge, a safe haven and/or a diversifier against extreme oil price movements, in comparison to the corresponding roles of gold. We use a quantile-on-quantile regression approach to capture the dependence structure between the considered market returns under different Bitcoin market conditions, while considering nuances of oil price movements, compared to gold. Our findings show that both Bitcoin and gold would serve the roles of a hedge, a safe haven and a diversifier for oil price movements. However, this property seems to be sensitive to the Bitcoin's and gold's different (bear, normal or bull) market conditions and to whether the oil price is in a downside, normal or upside regime. By controlling for new and relevant U.S. and global uncertainty indicators, we confirm that both Bitcoin and gold, but not oil, are assets where investors may park their cash during times of political and economic turmoil. The conditional Value-at-Risk (CoVaR) approach to risk management is then conducted, providing robust evidence of the usefulness of each of the Bitcoin and gold in expanded oil portfolios, in terms of diversification opportunities and downside risk reductions.

This paper attempts to provide an overview of the main challenges facing industrialized in a context of secular stagnation. There is no consensus on the meaning of this concept and various alternative views coexist. We present the key issues in the debates today, accounting for phenomena like the slowdown in factor productivity, liquidity and safety traps, the decline of natural interest rates, the historical downward trend of potential growths and low inflation rates. We provide a bird’s eye survey of the available literature on the causes of secular stagnation from a historical perspective, the symptoms, the main causes as well as some policies proposed to overcome it. We give some illustrations for the United Kingdom, the United States, the euro area and Japan.

The behavioural impact and acceptability of soft-drink taxes depend crucially on their incidence on consumer prices and welfare across socio-economic groups and markets. We use KantarWorldpanel homescan data to analyse the incidence of the 2012 French soda tax on Exact Price Indices (EPI) measuring consumer welfare from the availability and consumption of Sugar-Sweetened Beverages (SSB) and Non-Calorically Sweetened Beverages (NCSB) at a local geographical level. The soda tax has had significant, similar but small impacts on the EPI of SSB and NCSB (+4%), corresponding to an aggregate pass-through of about 40%. Tax incidence was slightly higher for low-income and high-consuming households. Retailers set higher pass-throughs in low-income, less-competitive and smaller markets. They did not change their product assortments. The lack of horizontal competition in low-income markets had a sizeable effect on tax regressivity. Finally, the negative income gradient in tax incidence was offset by a positive gradient in expected health benefits.

International audience; This paper shows the uneven role played in the inflation dynamics of African franc zone countries by their integration in a regional monetary union. We obtain three main results sharply contrasting the central- (CEMAC) and west-African (WAEMU) regions. First, differences in the structure of economies and national fiscal stances play a similar role in both unions and appear as potential sources of inflation differentials. Second, even though co-movements are the principal drivers of inflation dynamics in both subregions, global factors dominate regional ones in WAEMU while both play an equal role in CEMAC. Thirdly, spatial interactions are unimportant in CEMAC due to little intra-zone trade, but take an asymmetric form in WAEMU due to the large size of Ivory Coast and Senegal.

Which level of inflation should Central Banks be targeting? We investigate this issue in the context of a simplified Agent Based Model of the economy. Depending on the value of the parameters that describe the behaviour of agents (in particular inflation anticipations), we find a rich variety of behaviour at the macro-level. Without any active monetary policy, our ABM economy can be in a high inflation/high output state, or in a low inflation/low output state. Hyper-inflation, deflation and "business cycles" between coexisting states are also found. We then introduce a Central Bank with a Taylor rule-based inflation target, and study the resulting aggregate variables. Our main result is that too-low inflation targets are in general detrimental to a CB-monitored economy. One symptom is a persistent under-realisation of inflation, perhaps similar to the current macroeconomic situation. Higher inflation targets are found to improve both unemployment and negative interest rate episodes. Our results are compared with the predictions of the standard DSGE model., 19 pages, 6 figures. The paper is under review for the online journal "Economics". The reviews are public at this link: http://www.economics-ejournal.org/economics/discussionpapers/2017-64 . This version has been modified and improved following the advice of the reviewers and commentators

International audience; A number of macroeconomic theories, very popular in the 1980s, seem to have completely disappeared and been replaced by the dynamic stochastic general equilibrium (DSGE) approach. We will argue that this replacement is due to a tacit agreement on a number of assumptions, previously seen as mutually exclusive, and not due to a settlement by ‘nature’. As opposed to econometrics and microeconomics and despite massive progress in the access to data and the use of statistical software, macroeconomic theory appears not to be a cumulative science so far. Observational equivalence of different models and the problem of identification of parameters of the models persist as will be highlighted by examining two examples: one in growth theory and a second in testing inflation persistence.

International audience; This paper analyses how long credit policy measures should last to restore a normal function-ning of the loan market. We build a DSGE model where financial intermediaries and non financial agents face balance sheet constraints. Our results are two. First, we find that a credit policy has an intertemporal effect as it smoothes the negative shock along a greater number of periods. It dampens the inital negative consequences of financial shocks at the expense of a higherlength of the uncoventional period. Second, accounting for the joint effect of shocks on the length of the starurated period and on the fluctuation of activity in the transitory period back to the steady state situation, we find that the positive effect of this policy requires some qualification. For the benchmark calibration, conducting such a policy affects activity positively. However, for a high value of firm's leverage we find that unconventional monetary policy can be counterproductive. Ignoring credit policy will generate higher short run losses in activity but the transition to the steady state would be quicker, implying lower short run activity losses than those encountered with a credit policy where the transition to the steady state would last longer.

International audience; A minimal central bank credibility, with a non-zero probability of not renegning his commitment ("quasi-commitment"), is a necessary condition for anchoring inflation expectations and stabilizing inflation dynamics. By contrast, a complete lack of credibility, with the certainty that the policy maker will renege his commitment ("optimal discretion"), leads to the local instability of inflation dynamics. In the textbook example of the new-Keynesian Phillips curve, the response of the policy instrument to inflation gaps for optimal policy under quasi-commitment has an opposite sign than in optimal discretion, which explains this bifurcation.; Une crédibilité minimale de la banque centrale, avec une probabilité non-nulle de ne pas revenir sur son engagement, est une condition nécessaire pour ancrer les anticipations d'inflation et garantir le retour de l'inflation vers sa cible de long terme. En revanche, l'absence complète de crédibilité, avec la certitude que la banque centrale reviendra sur son engagement ("discrétion optimale"), implique une bifurcation de la dynamique de l'inflation vers des trajectoires déflationnistes ou hyper-inflationnistes. Dans l'exemple de la courbe de Phillips des nouveaux Keynésiens, la politique optimale à très faible crédibilité impose une réponse de l'instrument de politique monétaire aux écarts de l'inflation de signe opposé à la politique de discrétion optimale, ce qui explique cette bifurcation.

In this paper, we focus on the real dimension of the price dynamics in Japan between 1980 and 2000. We use a panel industry dataset to analyze the impact of institutional and structural factors on the heterogeneous price dynamics of 10 manufacturing sectors. Although the evolution of unit labor costs seems to be the driving force, our structural analysis underlines the importance of the increasingly competitive environment, as captured by rising import penetration. Along with the decline of bargaining power of the workforce, this is at the origin of the deflationary pressures that characterized the Japanese economy during the Lost Decade., Special Issue "26th Symposium of Money, Banking and Finance" Guest Editors :Sébastien Galanti and Grégory Levieuge, info:eu-repo/semantics/published

This paper aims to examine the relationship between exchange rate changes and domestic prices in DR. Congo, more particularly to measure the level of exchange rate pass-through to inflation from January 2002 to March 2017. Applying a cointegration and using a vector error correction model, the main finding is that a change in exchange rate will affect inflation more than proportionally, the level of pass-through being relatively high. One per cent of currency depreciation increases prices index of 0.38 per cent in the short run. This effect is larger in the long run where the increase in prices index is 1,66%. Furthermore, the adjustment towards equilibrium will take time (12 months and 2 weeks). As main implication, Congolese's monetary authority must, on the one, be careful and closely monitor exchange rate behaviour so as to take a prompt monetary policy action and stem inflation pressure from the external sector by targeted exchange rate market interventions and, on the other, rethink intermediate targets by adopting hybrid targeting : (i) monetary targeting and (ii) implicit and flexible exchange rate targeting., Ce papier a pour objectif d’analyser la relation entre le taux de change et les prix domestiques en RD. Congo, plus particulièrement de mesurer le degré du pass-through du taux de change nominal à l’inflation sur la période allant de Janvier 2002 à Mars 2017. En se basant sur l’approche par cointégration avec le modèle à correction d’erreur, la principale conclusion est qu’un changement dans le taux de change affectera l’inflation plus que proportionnellement, le degré du pass-through étant relativement élevé. Une dépréciation de 1% cause une hausse du niveau général des prix de 0,38% à court terme. Cet effet est encore plus large à long terme où la hausse du niveau général des prix est de 1,66%. En outre, l’ajustement vers l’équilibre prendra du temps (12 mois et 2 semaines). La principale implication de politique économique découlant de ces résultats est que l’autorité monétaire Congolaise doit, d’une part, être vigilante et suivre de près les mouvements du taux de change afin de poser des actions rapides et de contenir les pressions inflationnistes du secteur extérieur par des interventions ciblées sur le marché des changes et, d’autre part, repenser les objectifs intermédiaires en adoptant un ciblage hybride : (i) objectifs monétaires quantitatifs et (ii) ciblage implicite et souple du taux de change.

Using US data, we estimate optimal policy with a probability below one that the Fed reneges on its commitment ("limited credibility") versus discretionary policy where the Fed reneges on its commitment at all periods with a probability equal to one ("zero credibility"). The transmission mechanism is the new-Keynesian Phillips curve with auto-correlated cost-push shock. It includes the labor cost channel or the working capital channel. Discretion with zero credibility of the Fed is rejected. The working capital channel fits the data before Volcker's mandate. The labor cost channel fits the data since Volcker's mandate.

International audience; This paper examines the importance of nominal rigidity for nonlinearity and asymmetry of exchange rate pass-through. For this purpose, we rely on company-level data of French importing firms. We find that the well established fact that “prices rise faster than they fall,” which is characterized by the convex import price reaction function, lies primarily with the presence of nominal rigidity. Once price stickiness is controlled for, there is empirical evidence that the import price reaction function is rather concave if the linearity assumption can be rejected, indicating that firms aim primarily to protect their market share.

This paper shows that deviations from long-run price stability are optimal in the presence of price stickiness whenever profit and utility flows are discounted at a different rate. In that case, a monetary authority acting under commitment will choose a path for the inflation rate that ends with a non-zero value. Such a property is relevant in a wide range of macroeconomic environments. I first illustrate this by studying optimal monetary policy in a New Keynesian model with a perpetual youth structure. In this setting, profit flows are discounted more heavily than utility flows and the optimal inflation target is equal to 3.2 percent in a baseline calibration of the model. I also show that this property leads to a positive long-run inflation rate in models with firm entry and exit and in environments with search and matching frictions in the labor market and another form of nominal rigidity, wage stickiness.