Working Papers
2025
Can a central bank tighten monetary policy and real interest rates fall under monetary dominance? Introducing endogenous capital into the New Keynesian model allows real interest rates to move in either direction at the impact of a positive and persistent monetary policy shock. This raises concerns that the real interest rate channel is only observational — not structural — in these models. This paper demonstrates that the puzzle goes beyond capital. It emerges when the elasticity of an endogenous state variable to a persistent shock is high enough to depress inflation expectations, inducing the endogenous (or systematic) component of the monetary policy rule to sufficiently offset its exogenous component. The channel is indeed structural, but conventional short-run definitions of the natural interest rate (r-star) and the real interest rate gap can be misleading, particularly following events that significantly disrupt investment, such as pandemics, financial crises, or trade wars. As an alternative, sign-consistent gauge of the monetary policy stance, I propose the real interest rate gap that neutralizes the effect of shocks on endogenous state variables. From 1965Q1 to 2023Q3, it was often a better predictor of future inflation and helped to recount the history of monetary policy in the United States.
2024
Central Bank of Brazil, Research Department Working Papers Series
Rupert and Šustek (2019) showed that introducing endogenous capital into the canonical New-Keynesian model allows real interest rates to move in any direction after a positive monetary shock. According to them, this would prove that the real interest rate channel of monetary policy transmission is only observational — not structural — in that class of models, and therefore subject to the Lucas (1976) critique. In this paper, I show that such an identification problem for dynamic stochastic general equilibrium (DSGE) and vector autoregression (VAR) models can be circumvented by incorporating interest-rate smoothing — a feature as prevalent in medium-scale New-Keynesian models as capital itself — into the Taylor rule. I find that the negative association between changes in inflation and changes in the real interest rate is actually more robust than that between the former and changes in the nominal interest rate
Policy Work
2025
volume edited with Fernando Avalos and Ilhyock Shim
survey chapter authored with Torsten Ehlers, Ilhyock Shim, and Alexandre Tombini
Bank for International Settlements, BIS Paper
Periods of heightened uncertainty have become a defining feature of the global economic landscape, challenging central banks in unprecedented ways. The shocks of recent years – from the Covid-19 pandemic and persistent inflation to volatile financial conditions and geopolitical tensions – have tested the resilience of monetary policy frameworks and the agility of policy responses worldwide. Against this backdrop, central banks have reassessed their analytical tools, decision-making processes and communication strategies to ensure the continued effectiveness and credibility of monetary policy.
This volume offers a unique window into the experiences of central banks across the Americas and beyond, providing a comprehensive view of how institutions have navigated uncertainty in recent times. Drawing on both survey-based evidence and in-depth case studies from individual central banks, the chapters explore the evolving role of scenario analysis, the integration of high-frequency data and expert judgment, and the increasing importance of transparent and adaptive communication. Real-world experiences from 10 countries illustrate the diversity of challenges they face and the range of innovative responses they have developed.
One of the central themes emerging from these contributions is the need for a risk management approach to monetary policy. As the limits of models are exposed in times of heightened uncertainty, central banks are adopting more systematic scenario analysis, broadening their toolkit to include alternative models, and embracing intellectual humility in policy deliberations. At the same time, effective communication has become an indispensable policy instrument. Central banks are placing greater emphasis on clarity, transparency and accessibility, aiming to anchor expectations and maintain trust even when the outlook is clouded by uncertainty.
The chapters also highlight the value of institutional flexibility. Whether through adapting forward guidance, refining inflation forecasts or incorporating new data sources, central banks are demonstrating the importance of being able to respond rapidly as conditions evolve. The collective experience documented here underscores that uncertainty is not an exception but a constant in monetary policymaking. In response, central banks are learning to assess and communicate its implications with greater rigour and openness.
This volume stands as a testament to the power of collaboration and knowledge-sharing within the central banking community. It was brought to fruition by the efforts of the Consultative Group on Monetary Policy (CGMP) with support from the BIS Americas Office over the course of 2025 under the auspices of the Consultative Council for the Americas. It is intended as a resource for policymakers, researchers and practitioners seeking to understand and strengthen the foundations of monetary policy in an uncertain world. By sharing lessons learned and best practices, this volume will contribute to the ongoing development of resilient, credible and transparent policy frameworks that can meet the challenges of today and tomorrow.
JEL classification: E44, E58, F42, G01
Keywords: uncertainty, monetary policy, monetary policy communication, monetary policy reaction function, forward guidance, high-frequency data, scenario analysis
2025
with Rafael Guerra, Ilhyock Shim and Alexandre Tombini
Bank for International Settlements, BIS Bulletin
Key takeaways
Global factors shaped financial conditions in Latin America in 2025, with exchange rate appreciations against the US dollar loosening conditions in most countries.
Short-run monetary policy transmission in the region operates through financial conditions. In general, monetary easing leads to looser financial conditions and faster short-term output growth.
Measurement of overall financial conditions depends on the methodologies and assumptions used to construct financial conditions indices (FCIs). Understanding these differences helps central banks to use FCIs as an input to monetary policy.
Others
Ph.D. Thesis
Winner of the Haralambos Simeonidis 2022 prize for best Ph.D. thesis
Defense presentation (before final adjustments) download
All chapters download
Undergradute Senior Thesis
"A comparative analysis of the economic crises of 1929 and 2007 in the United States"
GitHub
Codes for replicating my papers
Other resources I have developed during my research process
xlDESSAZ: deseasonalize time series through the X13-ARIMA-SEATS method but within Excel
xlFOCUS: fetch Brazil economic data from webservices to Excel (Focus, SGS, SPI, ipeadata, etc.)
xlFRED: fetch data from the FRED (Federal Reserve Economic Data) database to Excel
xlMATRIX: handle vectors and matrices easily in Excel: slice, reverse, stack, shelve, and more with lambda functions. No VBA!
xlRcode: call R from Excel. Create new Excel functions that make use of R packages. Integrate both tools seamlessly
Projects at the BCB
BC Link