Is There an Information Channel of Monetary Policy?
Oliver Holtemöller, Alexander Kriwoluzky, Boreum Kwak
Oxford Bulletin of Economics and Statistics,
forthcoming
Abstract
Exploiting the heteroskedasticity of the changes in short-term and long-term interest rates and exchange rates around the FOMC announcement, we identify three structural monetary policy shocks. We eliminate the predictable part of the shocks and study their effects on financial variables and macro variables. The first shock resembles a conventional monetary policy shock, and the second resembles an unconventional monetary shock. The third shock leads to an increase in interest rates, stock prices, industrial production, consumer prices, and commodity prices. At the same time, the excess bond premium and uncertainty decrease, and the U.S. dollar depreciates. Therefore, this third shock combines all the characteristics of a central bank information shock.
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11.06.2026 • 17/2026
Economic Outlook: Between Energy Crisis and AI Boom
Until the outbreak of the energy crisis, the German economy was on a path to recovery. Now the recovery will only continue over the course of 2026 if the Gulf conflict eases and energy prices do not rise further. This assumption underlies the present summer forecast of the Halle Institute for Economic Research (IWH). In that case, German output is expected to increase by 0.9% for this year and for 2027. Growth rates in East Germany will be similar. In March, the IWH economists had predicted growth of 0.7% for 2026 and 1% for the next year.
Oliver Holtemöller
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Common Ownership, Tacit Know-How, and the Market for Technology
Dennis Hutschenreiter
IWH Discussion Papers,
No. 3,
2026
Abstract
Firms increasingly rely on markets for technology to acquire innovations developed outside their boundaries, yet acquiring intellectual property rights alone often does not guarantee successful implementation. Many technologies depend on tacit know-how that must be supplied by the provider after the transaction is completed. This paper examines whether common ownership between a technology provider and a potential adopter mitigates this implementation problem. I develop a model in which overlapping institutional investors cause the provider to partially internalize the adopter’s gains from successful implementation, strengthening incentives to transfer tacit know-how. This mechanism operates only when know-how is unverifiable – absent this friction, common ownership leaves matching and outcomes unchanged. Under moral hazard, the model predicts that common ownership increases the likelihood of technology transfer to a given adopter, that this effect is stronger when tacit know-how is more important, and that common ownership improves post-transfer outcomes conditional on adoption. I test these predictions using U.S. patent reassignments between publicly traded firms. Using within-deal variation across competing potential adopters and plausibly exogenous variation from passive index-fund holdings, I show that common ownership increases the likelihood that a firm acquires a technology, particularly when the transferred bundle is more tacit. Common ownership predicts stronger subsequent innovation and higher future firm value, especially when ownership overlap is concentrated among investors with stronger incentives to monitor the provider. These findings show how ownership structure shapes interfirm technology transfer by affecting not only who acquires a technology, but also how much value is created.
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12.03.2026 • 8/2026
Oil price shock threatens recovery in Germany
Globally rising energy prices in the wake of the new Gulf War are clouding the outlook for the German economy. Nevertheless, increased public expenditure is expected to support economic activity both this year and next. According to the spring forecast of the Halle Institute for Economic Research (IWH), output is projected to grow by 0.7% in 2026 and by 1.0% in 2027. We expect similar rates of expansion for East Germany. In December, the IWH economists had predicted growth of 1.0% for both 2026 and 2027.
Oliver Holtemöller
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11.12.2025 • 34/2025
Slight upturn on the horizon, structural problems remain
As the year draws to a close, it remains uncertain whether the German economy is on a path to recovery, as export weakness persisted through the autumn. Nevertheless, a slight upturn is forecast for 2026, supported by fiscal stimulus and rising real incomes. According to the winter forecast of the Halle Institute for Economic Research (IWH), output is projected to grow by 1.0% in 2026, after an increase of just 0.2% in 2025. In September, the IWH economists had predicted growth of 0.8% for 2026 and 0.2% for the current year. According to this forecast, the pace of expansion in East Germany is expected to be slightly slower, mainly due to demographic factors.
Oliver Holtemöller
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The Effect of Different Saving Mechanisms in Pension Saving Behavior: Evidence from a Life-Cycle Experiment
Martin Angerer, Michael Hanke, Ekaterina Shakina, Wiebke Szymczak
Journal of Risk and Financial Management,
Vol. 18 (5),
2025
Abstract
We examine how institutional saving mechanisms influence retirement saving decisions under bounded rationality and income risk. Using a life-cycle experiment with habit formation and loss aversion, we test mandatory and voluntary binding savings under deterministic and stochastic income. Voluntary commitment improves saving performance only when income is predictable; under uncertainty, it fails to improve performance. Mandatory savings do not raise total saving, as participants reduce voluntary contributions. These results emphasize the role of income smoothing in enabling behavioral interventions to improve long-term financial outcomes.
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25.09.2025 • 28/2025
Joint Economic Forecast Autumn 2025: Fiscal stimulus masks structural weakness
The German economy is emerging from the trough and is likely to regain some momentum over the next two years. Following stagnation in the first half of the year, the Joint Economic Forecast project group predicts gross domestic product growth of 0.2% for the current year in its fall report. In the next two years, an expansionary fiscal policy is likely to accelerate economic growth noticeably to 1.3% and 1.4%, respectively. This means that the institutes' forecast for this year and next remains roughly unchanged from the spring report. “The German economy is still on shaky ground,” says Dr Geraldine Dany-Knedlik, head of the Forecasting and Economic Policy Division at the German Institute for Economic Research (DIW Berlin). “It will recover noticeably in the next two years. However, given ongoing structural weaknesses, this momentum will not last.”
Oliver Holtemöller
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Predicting IPO First-Day Returns: Evidence From Machine Learning Analyses
Gonul Colak, Mengchuan Fu, Iftekhar Hasan
Journal of Banking and Finance,
Vol. 178 (September),
2025
Abstract
Predicting IPO first-day returns is inherently challenging due to the wide range of contributing factors, each with distinct statistical properties. We assess the performance of several machine learning (ML) techniques and identify XGBoost as the most statistically effective model for forecasting first-day returns. Using a comprehensive set of 863 pre-IPO variables, our high-performing predictive model accurately estimates both the direction and magnitude of IPO first-day returns. The most influential predictors include underwriter agency measures, price revision, and the free-float fraction. Using a rolling-window predictive approach, the model demonstrates substantial practical value, generating approximately $300 billion in gains from IPOs with positive first-day returns and avoiding more than $22 billion in losses from those with negative returns over the 2000–2016 period.
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Halle Institute for Economic Research
Between Energy Crisis and AI Boom The summer forecast of the Halle Institute for Economic Research (IWH) assumes that the Gulf conflict eases and energy prices do not rise…
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Economic Outlook
IWH Summer Forecast 2026 Between Energy Crisis and AI Boom June 11, 2026 Until the outbreak of the energy crisis, the German economy was on a path to recovery. Now the recovery…
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