VoxTalks Economics

Textbook economics says a tariff should strengthen a country's currency. Since the start of 2025, as US tariffs rose ... and the dollar fell.
In the first of four episodes of Voxtalks based on papers presented at the second Economic Policy: Papers on European and Global Issues conference, Alfonso Merendino (Bocconi University) and Tommaso Monacelli (Bocconi University, CEPR) tell Tim Phillips what they found when they looked for reasons. Their conclusion: for tariffs, it's not size, it is how permanent people expect it to be. They call this structural trade policy uncertainty. 
When that uncertainty is low, a tariff behaves exactly as the textbook says. When it's high, the same tariff can weaken the currency, shrink output and pull down inflation instead.
The research behind this episode:
Merendino, Alfonso, and Tommaso Monacelli. 2026. "Tariffs, Uncertainty, and the Exchange Rate." Conference draft, presented at the 2nd Economic Policy: Papers on European and Global Issues Conference, Venice, 19-20 June 2026. Forthcoming in Economic Policy.
To cite this episode:
Phillips, Tim, Tommaso Monacelli, and Alfonso Merendino. 2026. "Tariffs, Uncertainty, and the Exchange Rate." VoxTalks Economics (podcast).

About the guests

Tommaso Monacelli is Professor of Economics at Bocconi University and a Research Fellow of IGIER Bocconi and CEPR. His research spans international macroeconomics, monetary policy and the business cycle, with recent work on tariffs and monetary policy, supply chain uncertainty and inflation, and heterogeneous bank models of monetary transmission. He is co-editor of the Journal of International Economics and was managing co-editor of Economic Policy from 2016 to 2021.
Alfonso Merendino is a PhD student in Economics at Yale University and a Research Fellow at the Social Economics Lab. He recently completed a research placement in macroeconomic modelling at the European Central Bank, and holds a Bachelor's and Master's degree in Economics from Bocconi University, where this paper was written.
Research cited in this episode

Structural trade-policy uncertainty (S-TPU). The paper's central measure, capturing uncertainty not about the size of a tariff but about how persistent the trade-policy regime behind it will be. Merendino and Monacelli split observed US tariff rates from 1990 to 2025 into a persistent component and a short-lived transitory one, using a state-space model with separate volatility for each, and define S-TPU as the volatility of the persistent component.
The 2017 US withdrawal from the Trans-Pacific Partnership. The authors' example of a pure S-TPU shock. The withdrawal changed no tariff rate on impact, but it reshuffled expectations about the durability of US trade policy, and their index of structural uncertainty spikes at this point.
"Liberation Day" tariffs, April 2025. The sweeping tariff package announced by the Trump administration on 2 April 2025. The paper treats this, alongside the 2018 Section 301 tariffs on China, as one of two clearly identified tariff shocks used to anchor its statistical model.
Aggregate trade-policy uncertainty index. Caldara, Dario, Matteo Iacoviello, Patrick Molligo, Andrea Prestipino, and Andrea Raffo. 2020. "The Economic Effects of Trade Policy Uncertainty." Journal of Monetary Economics 109: 38-59. This newspaper-based index of trade-policy uncertainty mixes announcement noise with genuine regime change; Merendino and Monacelli show that conditioning on it, rather than on their narrower S-TPU measure, erases the state-dependent pattern they document.
Narrative-dominance identification. The technique the authors use to isolate tariff shocks in their statistical model, adapted from Juan Antolín-Díaz and Juan F. Rubio-Ramírez. 2018. "Narrative Sign Restrictions for SVARs." American Economic Review 108 (10). Rather than imposing a full statistical model, the method anchors identification to a small number of clearly documented policy events, such as the 2018 and 2025 tariff rounds, and lets everything else, including the sign of the exchange-rate response, be estimated freely from the data.
More VoxTalks Economics episodes

The second Economic Policy: Papers on European and Global Issues conference follows the first, held in Paris in December 2025. Three earlier VoxTalks Economics episodes from that Paris conference asked what comes next for Ukraine's economy.
What's next for Ukraine: Investment, in which Yuriy Gorodnichenko and Maurice Obstfeld argue that forgiving Ukraine's war debt, rather than treating it as an obstacle, is essential to attracting the $40 billion a year that reconstruction needs.
What's next for Ukraine: Reconstruction, in which Edward Glaeser, Martina Kirchberger, and Andrii Parkhomenko argue that postwar Tokyo, not Warsaw or Berlin, is the right model for rebuilding Ukraine's cities.
What's next for Ukraine: The labour market, in which Giacomo Anastasia documents the surprising resilience of Ukraine's wartime labour market.
Related reading on VoxEU

Tariffs and US dollar depreciations: Not so surprising after all, a VoxEU column in which Giancarlo Corsetti, Simon Lloyd, and Daniel Ostry argue that the dollar's fall after Liberation Day is explained by foreign retaliation, a different mechanism from the persistence channel that Merendino and Monacelli identify.
Tariffs, the dollar, and equities: High-frequency evidence from the Liberation Day announcement, in which Jonathan Hartley and Alessandro Rebucci show that the dollar depreciated on impact on 2 April 2025, against the standard prediction, and trace this to foreign investors rebalancing away from US equities.

Norwegian conscripts arrive at boot camp straight out of school. They are assigned at random to a shared room and they live in it for the next eight weeks. Whatever the culture of that room turns out to be, they are stuck with it.
We know that the military everywhere has a poor record on sexual harassment. Johanna Rickne (Stockholm University, CEPR) and her co-authors wanted to reduce its acceptance, and the number of incidents. 
Compulsory training, standing a in a room a showing a PowerPoint, has a poor record. It can even inspire a backlash. Instead,  they included two pieces of information in a 20-minute enrolment survey. One fact was about how women score on the army's own end-of-service assessments. The other was about what last year's recruits really thought about crude sexual jokes. Eight weeks later, the researchers came back to see what had changed for the 949 recruits.
The research behind this episode:
Olle Folke, Torbjørn Hanson, Åshild A. Johnsen, Andreas Kotsadam, and Johanna Rickne. 2026. "Targeting Attitudes to Combat Sexual Harassment: A Randomized Intervention in the Norwegian Military." CEPR Discussion Paper 21475. The discussion paper is gated. It is also published in the Journal of Economic Behavior and Organization.
To cite this episode:
Phillips, Tim, and Johanna Rickne. 2026. "Combatting sexual harassment in the military." VoxTalks Economics (podcast).

About the guest

Johanna Rickne is Professor of Economics at the Swedish Institute for Social Research (SOFI) at Stockholm University, and holds part-time chairs at the University of Nottingham and the Stockholm School of Economics. She is affiliated with the Centre for Economic Policy Research. Her research spans labour economics, political economics and gender economics, with sustained work on sexual harassment as a workplace hazard, on who ends up in political office, and on what makes work meaningful. She won the Assar Lindbeck Medal in 2023.
Research cited in this episode

The Sexual Experiences Questionnaire is the behavioural instrument used to measure prevalence here. Rather than asking people whether they were sexually harassed, a term that different people read very differently, it presents a list of specific behaviours and asks whether each one happened. The version used in Norway runs to 14 items and is adapted from the questionnaire developed for the US military.
Gender harassment is one of three categories in the standard model of sexual harassment, alongside unwanted sexual attention and sexual coercion. It covers hostile or demeaning conduct based on someone's sex or gender that is not necessarily sexual in nature, including remarks that a person is not suited to the job. In this boot camp it was the most common behaviour reported by women.
Backlash from compliance training is the reason the intervention avoids looking like training at all. Mark Roehling, Dongyuan Wu, Mahl Geum Choi and James Dulebohn's 2022 meta-analysis in Personnel Psychology gathers the evidence on what harassment training does and does not shift; other studies find that employees most inclined to harass become more tolerant of the behaviour after being told how to behave. Voluntary sessions have the opposite problem, in that those employees do not turn up.
Misperceived social norms supply the mechanism for the second piece of information. Leonardo Bursztyn, Alessandra Gonzalez and David Yanagizawa-Drott's study of Saudi Arabian husbands showed that men privately supported their wives working outside the home while badly underestimating how many other men agreed; correcting the misperception changed what those men did. The boot camp version asks recruits what their predecessors thought about sexualised jokes, then tells them the answer.
The Norwegian Armed Forces service statement is the source of the first piece of information. Recruits are assessed at the end of service on leadership, responsibility, collaboration, professional competence and judgement. Average scores show no gender gap; the graph was shown to the treated recruits in this experiment.
The vignette holds the harassment event constant across everyone who answers. Recruits read a short scenario set in a room like their own and rate six statements about it, covering whether the conduct counts as harassment, what the woman should do, and what any bystanders owe her. Because the incident is fixed, differences in the answers cannot be explained away by differences in what people happened to experience.
Sexual harassment and gender inequality is the wider agenda this episode sits inside. Olle Folke and Johanna Rickne's 2022 paper in the Quarterly Journal of Economics uses Swedish survey and administrative data to show that harassment risk falls hardest on whichever sex is in the minority in a workplace, and that it pushes people out of jobs.
More VoxTalks Economics episodes

Violence against women in politics. Gianmarco Daniele on why women who win office in Italy are far more likely than men to be attacked, and what that does to who stands for election in the first place.
Violence against women at work. Abi Adams-Prassl on Finnish police records linked to employment data, and what happens to the careers of the victim and the perpetrator after one colleague assaults another.
Related reading on VoxEU.org

Discrimination in work conditions: The case of sexual harassment, a VoxEU column by Johanna Rickne and Olle Folke arguing that economists should treat sexual harassment as gender discrimination in working conditions, and showing that both men and women carry the risk when they are the gender minority.

In the oldest Japanese municipalities, close to half the residents are already over 65. As young people move to cities, the retailers close, then the clinics, then the bus that used to reach the next town. Rural Japan is not simply ageing: it is emptying.
Elisa Giannone (CREI, CEPR) and her co-authors have analysed Japan's 1,741 municipalities from 1980 onwards. The oldest quarter of them lost around 26% of their population by 2010; the youngest quarter grew by 22%, and the gap between them is still widening. 
Taxing city dwellers could reverse the trend. But that's a century-long policy, that would also lower national income per head by about 1.3%. There is no version of this without a bill attached, she warns.
The research behind this episode:
Giannone, Elisa, Yuhei Miyauchi, Nuno Paixão, Xinle Pang, and Yuta Suzuki. 2026. "Living in a Ghost Town: The Geography of Depopulation and Aging." CEPR Discussion Paper 21447 (gated).
To cite this episode:
Phillips, Tim, and Elisa Giannone. 2026. "What price to save Japan's ghost towns?" VoxTalks Economics (podcast).

About the guest

Elisa Giannone is a researcher at CREI, an Adjunct Professor at Universitat Pompeu Fabra, an Affiliated Professor at the Barcelona School of Economics. She works on internal migration, regional income divergence, the spatial consequences of local shocks and the question of why people move.
Research cited in this episode

Social and natural population change. Demographers separate population movements through migration, known as social change, from births and deaths, known as natural change. Giannone's team runs both counterfactuals separately. Shut down migration and the oldest municipalities still age, but the population loss between 1980 and 2010 falls from nearly 0.3 log points to under 0.1. The framework follows Stanley Smith, Jeff Tayman and David Swanson's standard treatment of state and local population projections.
Scale economies in local public services. A 1% increase in local population is associated with a 0.53% fall in municipal government spending per head. Roads, schools, clinics and administration carry a large fixed cost, so the cost of serving each remaining resident rises as a town shrinks. This is the fiscal arithmetic that makes depopulation expensive.
Consumption-equivalent flow utility. The paper's measure of quality of life, amenity-adjusted real income. It captures what the residents of a place can actually buy and enjoy rather than what they earn on paper, which matters when the shops and the doctors are leaving.
The five oldest prefectures. Kochi, Shimane, Tokushima, Tottori and Yamagata, ranked by elderly share in 2015. They are the target group in every policy simulation, and their combined elderly share reaches nearly 60% by 2215 under the baseline projection.
Municipal extinction. Hiroya Masuda's 2014 book Chiho Shometsu warned that unipolar concentration in Tokyo would drive hundreds of rural municipalities out of existence. It set the terms of Japan's regional revitalisation debate, and the paper's projections give that warning a number.
United Nations World Population Prospects. Giannone's figures for the global picture, including the count of countries that have already passed peak population and those projected to do so by the mid 2050s, come from the UN projections rather than from the paper itself.
More VoxTalks Economics episodes

Economic decline and the rise of populism. Andrés Rodríguez-Pose explains what happens politically in the places this episode watches emptying, and why long term regional decline shows up at the ballot box.
Related reading on VoxEU.org

Living in a ghost town: The geography of depopulation and ageing. The authors' own column, with the charts behind this episode.
Japan's age wave: Challenges and solutions, a column by Andrew Stawasz, Paige Kirby, JP Sevilla and David Bloom on the national scale of the problem this episode breaks down by region.
Mobile seniors and local economic development. Marco Badilla-Maroto, Benjamin Faber, Antoine Levy and Mathilde Munoz find that retirees moving into poorer French regions bring economic gains with them, a useful counterweight to the Japanese story.
Population shrinking and the future of European municipalities, in which Friedrich Heinemann, Alexander Kalb and Benny Geys set out the scale economies problem for Europe's own shrinking towns.

Travel broadens the mind. So the Voxtalks visits a conference, we find the most interesting research from economists just starting out, and hand three of them a microphone. Ad that is today's episode, recorded at the CEPR Paris School of Economics Policy Forum 2026.
Listen to hear three findings that undercut conventional wisdom. Guido Lamarmora (University of Nottingham) argues that the usual policy prescription for developing economies that want to industrialise of raising agricultural productivity can deepen their reliance on farming rather than break it. Costanza Tomaselli (Imperial College London) studies what an energy price shock in Mexico does to employment: she finds that firms without access to credit hire rather than fire. Mushegh Tovmasyan (University of Paris-Saclay) follows Armenia after Russia was sanctioned in 2022, where trade doubled but the gains went to incumbents and their workers, not to new firms.
The research behind this episode:
Lamarmora, Guido. 2026. "The Food Problem in an Open Economy." 
Tomaselli, Costanza, and Armando Rangel Colina. 2026. "Energy Shocks, Employment Response, and Heterogeneous Credit Access." 
Tovmasyan, Mushegh. 2026. "Trade and Firm-Level Adjustments to Geopolitical Shifts: Evidence from Armenia." 
To cite this episode:
Phillips, Tim, Guido Lamarmora, Costanza Tomaselli, and Mushegh Tovmasyan. 2026. "The Next Generation: PSE 2026." VoxTalks Economics (podcast).

About the guests

Guido Lamarmora is completing his PhD at the University of Nottingham, with research on international trade, macro development, and structural transformation. Soon you will find him at Johannes Gutenberg University Mainz as a postdoc.
Costanza Tomaselli is a PhD candidate at Imperial College Business School, with research spanning financial economics, industrial organisation, and energy economics.
Mushegh Tovmasyan is a PhD candidate at University Paris-Saclay, RITM, with research spanning international trade, sanctions, and firm and worker outcomes, built on newly accessible Armenian administrative microdata.
Research cited in this episode

The food problem. The long-standing account of why poor countries keep so many workers in agriculture; households spend most of their income on food, and low farm productivity means many workers are needed just to feed the population. Lamarmora's point is that the standard fix, raising farm productivity or opening to trade, need not hold once you model the economy as open and put land into the picture.
Land as a fixed factor. Agriculture uses land, which is fixed, as well as labour. Ignore it and a country with many workers per hectare looks unproductive when it is not. Once land is accounted for, low-income countries turn out to have relatively high agricultural productivity, which flips the conventional diagnosis.
Input-output linkages. Industry is wired into the rest of the economy through supply chains, so a rise in industrial productivity or cheaper industrial imports lowers costs everywhere, including on the farm. In Lamarmora's estimates the gains from industry run roughly twice those from raising agricultural productivity.
Storm Uri. The February 2021 winter storm that damaged the natural gas pipeline supplying Mexico's electricity, producing a sharp and spatially uneven jump in power prices. Tomaselli uses distance to gas-fired capacity as the source of variation to isolate the labour-market effect of an energy shock.
Credit access as a shock absorber. Mexico gave firms no fiscal support after the shock, which let Tomaselli see what finance alone can do. Firms with credit did not change production or employment; they borrowed to smooth the shock. The suggestive model implication is that easing credit frictions could do the work of a blanket energy subsidy at lower cost to the public purse.
Sanctions and the neutral economy. Sanctions destroy trade between the sanctioning and target countries but open opportunities for neutrals. Armenia, a landlocked transition economy with trade near 100% of GDP and Russia as its largest partner, saw trade double to triple after 2022. Tovmasyan uses Armenian customs and matched employer-employee microdata to ask whether this is new production, rerouting, or just higher prices.
Incumbent-led intermediation. The trade boom was driven by existing large firms scaling up relationships and adding sanctioned goods such as electronics and machinery, not by broad new entry. Employment barely moved; gains showed up as more hours and higher wages for existing workers, which Tovmasyan reads as intermediation rents shared with labour.
More VoxTalks Economics episodes

Previous next generations:
Paris 25: Ali Bakhtawar, Lucie Giorgi, and Alishuba Philip discuss Lawfare, single sex schooling, and slum clearance.
PSE 25: Pelin Ozgul, Deepakshi Singh, and Nathan Vieira on AI in call centres, female employment in India, and short-time work in Europe.
Paris 24: Laura Arnemann, Gustavo Julio García Bernal, and Matyas Molnar tall Tim about performance-related pay, intergenerational wealth, and international exhibitions. 
PSE 24: Alice Chiocchetti, Yuan Hu, and Christoph Semken describe their research on profit-shifting, green tech, and the effect of changing to a greener lifestyle.
Follow VoxTalks to discover more of yesterday’s stars of tomorrow.

Recorded at the PSE-CEPR Policy Forum 2026.
A country wants a stable exchange rate, it wants money to move freely across its borders, and it wants to set its own interest rates. It's a well-known trilemma. Central bankers must pick any two, because you cannot have all three. 
History, it turns out, did not read that memo.
Eric Monnet has spent years reading the balance sheets that central bankers kept on each other. Since 1891 the Bank of France paid teams of multilingual economists to copy out the weekly and monthly accounts of every other central bank in the world. Those ledgers, now digitised, show that central banks have been far more than interest-rate setters. For more than a century they have quietly expanded their balance sheets to cushion their economies against shocks arriving from abroad. In this week's VoxTalk, Monnet argues we have seriously underestimated how much room to manoeuvre they have used since the 19th century.
The research behind this episode:
Bazot, Guillaume, Eric Monnet, and Matthias Morys. 2024. "Central Banks and the Absorption of International Shocks (1891-2019)." CEPR Discussion Paper No. 19646. (Gated.)
To cite this episode:
Phillips, Tim, and Eric Monnet. 2026. "Absorbing shocks since 1891." VoxTalks Economics (podcast).

About the guest

Eric Monnet is Professor at the Paris School of Economics and EHESS, and a Research Fellow at CEPR. An economic historian, his work spans central banking, the international monetary system, and the history of European financial systems across the 19th and 20th centuries. He previously worked as an economist at the Bank of France, and his book Controlling Credit examines monetary policy in postwar France.
Research cited in this episode

The Mundell trilemma. Formulated by Robert Mundell in the 1960s, the trilemma holds that an open economy cannot simultaneously maintain a fixed exchange rate, free capital movement, and an independent monetary policy; it can have any two. Mundell received the Nobel Prize in part for the idea. 
The global financial cycle and the dilemma. Helene Rey argues that even a floating exchange rate does not buy full monetary autonomy, because a common global financial cycle, driven by the risk appetite of large financial institutions, moves interest rates and exchange rates across countries at once. A shock in one emerging market prompts investors to demand higher compensation across others they treat as similar. The trilemma, in this view, is really a dilemma.
The Bank of France archive. The research department of the Bank of France was founded to track the financial operations of foreign central banks, collecting their weekly and monthly balance sheets from 1891 onward. The dataset assembled from these records covers 23 countries, essentially every central bank in existence by the late 1930s, and combines balance-sheet data with monthly figures on industrial production, consumer prices, and stock markets.
Discount loans, open market operations, and foreign exchange interventions. The specific tools have changed completely; the behaviour has not. In the 19th century central banks intervened by discounting commercial bills and holding gold or foreign deposits; today they conduct open market operations in government bonds and hold US Treasury bills. Across all these forms, the response to an external shock, expanding domestic assets to supply liquidity, has been consistent.
Taming the Global Financial Cycle. The predecessor study by the same authors: Bazot, Monnet, and Morys, "Taming the Global Financial Cycle: Central Banks as Shock Absorbers in the First Era of Globalization," Journal of Economic History 82(3), 2022, which established the pattern for the classical gold standard period.
More VoxTalks Economics episodes

The Bank of England's Capital Mistake. Former Bank insiders David Aikman and John Vickers argue that cutting equity capital requirements for UK banks could raise the odds of a financial crisis, a companion piece on what central bank balance sheets are for.
Related reading on VoxEU.org

Central banks and the absorption of international shocks, the authors' own VoxEU column setting out the dataset and the two main findings in brief.