Working Papers

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2024

March 15, 2024

Effect of Exchange Rate Movements on Inflation in Sub-Saharan Africa

Description: This paper provides new evidence on the exchange rate passthrough to domestic inflation in Sub-Saharan Africa (SSA) using both bilateral US dollar exchange rate and the nominal effective exchange rate (NEER), and monthly data. We find that depreciations cause sizable increases in domestic inflation. The passthrough in SSA is higher than in other regions and its magnitude depends on the exchange rate regime, type of exchange rate (bilateral versus NEER), natural resource endowment and domestic market competitiveness. The passthrough is found to be disproportionately larger and more persistent for large depreciation shocks, and for exchange rate changes that are more persistent. We also find evidence of asymmetry, with passthrough eight times stronger during depreciations than appreciations. Additional findings suggest that improved monetary policy effectiveness is an important driver of our observed declining estimates of exchange rate passthrough over time, supporting the long-standing view that strengthening monetary policy frameworks and credibility helps mitigate the impact of depreciations on inflation.

March 15, 2024

Efficient Economic Rent Taxation under a Global Minimum Corporate Tax

Description: The international agreement on a corporate minimum tax is a milestone in global corporate tax arrangements. The minimum tax disturbs the equivalence between otherwise equivalent forms of efficient economic rent taxation: cash-flow tax and allowance for corporate equity. The marginal effective tax rate initially declines as the statutory tax rate rises, reaching zero where the minimum tax is inapplicable, and increases thereafter. This kink occurs at a lower statutory rate under cash-flow taxation. We relax the assumption of full loss offset; provide a routine for computing effective rates under different designs; and discuss policy implications of the minimum tax.

March 15, 2024

The ECB’s Future Monetary Policy Operational Framework: Corridor or Floor?

Description: This paper reviews the trade-offs involved in the choice of the ECB’s monetary policy operational framework. As long as the ECB’s supply of reserves remains well in excess of the banks’ demand, the ECB will likely continue to employ a floor system for implementing the target interest rate in money markets. Once the supply of reserves declines and approaches the steep part of the reserves demand function, the ECB will face a choice between a corridor system and some variant of a floor system. There are distinct pros and cons associated with each option. A corridor would be consistent with a smaller ECB balance sheet size, encourage banks to manage their liquidity buffers more tightly, and facilitate greater activity in the interbank market. But it would require relatively more frequent market operations to ensure the money markets rate stays close to the policy rate and could leave the banking system vulnerable to intermittent liquidity shortages that may have financial stability implications and impair monetary transmission. The floor, on the other hand, would allow for more precise control of the overnight rate and a lower risk of liquidity shortages, but it would entail a somewhat larger ECB balance sheet, weaken the incentives for banks to manage their liquidity buffers, and discourage interbank market activity. The analysis of tradeoffs suggests that, on balance, in steady state, a hybrid system that combines the features of the “parsimonious floor” (with a minimal volume of reserves) with a lending facility or frequent short-term full-allotment lending operations priced at or very close to the deposit rate, making it a “zero (or near-zero) corridor”, would be most conducive for achieving the ECB’s monetary policy objective.

March 8, 2024

Understanding Inflation Dynamics: The Role of Global Shocks in CEMAC

Description: As in the rest of the world, inflation in CEMAC surged more quickly and persistently than expected during the 2021–23 period. This paper examines the drivers of inflation dynamics and the contribution of global shocks to inflation persistence in CEMAC. We use a Phillips curve framework combined with the local projections method. Our results confirm the prominent role of global factors in driving inflation dynamics. Global commodity food and oil price fluctuations, and shipping costs are the main factors explaining the large variability in headline inflation. Further, we find that global price shocks have sizable and persistent effects on domestic headline inflation, with differences in the magnitude and speed of pass-through. The pass-through from commodity food price fluctuations to headline inflation is higher and more persistent than that of other global price shocks, reflecting the large share of food in the consumption baskets, which makes inflation more vulnerable to direct effects of international food shocks, but also larger second-round effects.

March 8, 2024

Predicting IMF-Supported Programs: A Machine Learning Approach

Description: This study applies state-of-the-art machine learning (ML) techniques to forecast IMF-supported programs, analyzes the ML prediction results relative to traditional econometric approaches, explores non-linear relationships among predictors indicative of IMF-supported programs, and evaluates model robustness with regard to different feature sets and time periods. ML models consistently outperform traditional methods in out-of-sample prediction of new IMF-supported arrangements with key predictors that align well with the literature and show consensus across different algorithms. The analysis underscores the importance of incorporating a variety of external, fiscal, real, and financial features as well as institutional factors like membership in regional financing arrangements. The findings also highlight the varying influence of data processing choices such as feature selection, sampling techniques, and missing data imputation on the performance of different ML models and therefore indicate the usefulness of a flexible, algorithm-tailored approach. Additionally, the results reveal that models that are most effective in near and medium-term predictions may tend to underperform over the long term, thus illustrating the need for regular updates or more stable – albeit potentially near-term suboptimal – models when frequent updates are impractical.

March 8, 2024

An Assessment of the 2019 and 2020 Pension Reforms in Mexico

Description: In recent years the Mexican pension system has changed significantly. In 2019 the existing means-tested social pension was made universal – covering everyone over the age of 65 – and the benefit level increased. In 2020, the main regime of the private sector was substantially reformed, increasing contribution rates for the funded defined contribution system, lowering the minimum years of contributions needed to receive an earnings-related pension, and increasing minimum pensions. This paper tries to assess the likely outcomes of those reforms, discusses design inefficiencies of the reforms and offers policy options to improve pension system design.

March 8, 2024

Specialization, Market Access and Real Income

Description: This paper estimates the impact of external demand shocks on real income. We utilize a first order approximation to a wide class of small open economy models that feature sector-level gravity in trade flows, which allows us to measure foreign shocks and characterize their welfare impact in terms of reducedform elasticities. We use machine learning techniques to group 4-digit manufacturing sectors into a smaller number of clusters, and show that the cluster-level elasticities of income with respect to foreign shocks can be estimated using high-dimensional statistical techniques. Foreign demand shocks in complex intermediate and capital goods have large positive impacts on real income, whereas impacts in other sectors are negligible. We showthat the estimates imply that countries that specialize in these sectors enjoy greater gains from increased openness, and that (small) export subsidies to these sectors are welfare-improving. Finally, a calibrated multisector production and trade model with input-output linkages and external economies of scale can match the empirical estimates.

March 8, 2024

Debt Surges—Drivers, Consequences, and Policy Implications

Description: Many countries find themselves with elevated debt levels, increased debt vulnerabilities, and tight financing conditions, while also facing increased spending needs for development and transition to a greener economy. This paper aims to place the current debt landscape in a historical context and investigate the drivers of debt surges, to what degree they result in a crisis as well as examine post-surge debt trajectories and under what conditions debt follows a non-declining path. We find that fiscal policy and stock-flow adjustments play important roles in debt dynamics with the valuation effects arising from currency depreciation explaining more than half of stock flow adjustments in LICs. Debt surges are estimated to result in a financial crisis with a probability of 11–20 percent and spending-driven fiscal expansions during debt surges tend to result in a high probability of non-declining debt path.

March 8, 2024

Geoeconomic Fragmentation and International Diversification Benefits

Description: This paper applies the two-country open-economy model with trade in stocks and bonds of Coeurdacier et al. (2010) to quantify the loss of international diversification benefits for major advanced economies, which have a significant presence in international financial markets, under geoeconomic fragmentation. We perform counterfactual simulations under different hypothetical fragmentation scenarios in which these economies are unable to trade with geopolitically distant countries, as measured by voting disagreement on foreign policy issues at the United Nations General Assembly meetings during 2012-2021. The simulation results imply a potentially significant loss of international diversification benefits of financial openness for the considered advanced economies by limiting trading to partner countries that are geopolitical allies with highly synchronized business cycles.

March 8, 2024

Monetary Policy with Uncertain Inflation Persistence

Description: When uncertain about inflation persistence, central banks are well-advised to adopt a robust strategy when setting interest rates. This robust approach, characterized by a "better safe than sorry" philosophy, entails incurring a modest cost to safeguard against a protracted period of deviating inflation. Applied to the post-pandemic period of exceptional uncertainty and elevated inflation, this strategy would have called for a tightening bias. Specifically, a high level of uncertainty surrounding wage, profit, and price dynamics requires a more front-loaded increase in interest rates compared to a baseline scenario which the policymaker fully understands how shocks to those variables are transmitted to inflation and output. This paper provides empirical evidence of such uncertainty and estimates a New Keynesian Dynamic Stochastic General Equilibrium (DSGE) model for the euro area to derive a robust interest rate path for the ECB which serves to illustrate the case for insuring against inflation turning out to have greater persistence.

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