Alumni
Alumni IWH provides guidance and support in job placement after graduation, including letters of recommendation and career advice. Graduates have found placements in academia…
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1st CompNet Data User Conference
1st CompNet Data User Conference Since it is well established among researchers of productivity and competitiveness that macro data cannot answer all questions emerging in today's…
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4th and 5th vintage
4th and 5th Vintage CompNet Dataset In 2015-2016 The Competitiveness Research Network released to the public respectively the 4th & 5th Vintage of its aggregated micro-based…
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How Do Banks Respond to Supplier IPOs?
Sung C. Bae, Iftekhar Hasan, Liuling Liu, Haizhi Wang
Financial Markets, Institutions and Instruments,
Vol. 34 (3),
2025
Abstract
This paper examines how supplier IPO events affect their key customers’ cost of debt. The evidence reveals that average loan spreads for customers increase by roughly 20% (23.7 basis points) following suppliers’ IPO events. This negative spillover effect is more pronounced when suppliers make significant relationship-specific investments (high switching cost), when suppliers face less concentrated customer bases, or when customers face more concentrated supplier bases. Our results show that customers receive less favourable trade terms and are forced to pay more for inputs after their suppliers go public, all of which increase customers’ operational costs, risk and subsequent borrowing costs. Furthermore, we document that customer loan contracts become significantly more restrictive after a supplier's IPO. Finally, we find that the observed negative spillover effect is also present in customers’ access to the public bond market.
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12.08.2025 • 24/2025
20 years after Hurricane Katrina: Church membership contributed significantly to economic recovery
Katrina and other hurricanes caused devastating damage in the south-east of the USA in the summer of 2005. A study by the Halle Institute for Economic Research (IWH) shows: in the years following the disaster, establishments in counties with higher rates of church membership saw a significantly stronger recovery in terms of productivity.
Felix Noth
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Tax Authority Attention and Financial Reporting
Iftekhar Hasan, Tahseen Hasan, Kose John
International Journal of Banking, Accounting and Finance,
Vol. 15 (1/2),
2025
Abstract
We study the effects of Tax Authority (IRS) attention on a firm’s financial reporting. We explore whether firms institute a higher degree of accounting conservatism in response to IRS monitoring. Using data on IRS acquisition of public firms’ 10-K financial disclosures to proxy for IRS attention, we find that when firms are under IRS attention, they tend to initiate higher levels of unconditional and, to some extent, conditional accounting conservatism. We alleviate some of the endogeneity concerns by using pre- and post-IRS attention environments between the treated group (firms with IRS attention) and a propensity score that matches the control group of firms (no IRS attention). These results withstand several robustness tests and subsample analyses.
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Can there be a diversity premium in the housing market?
Rachel Cho, Hisham Farag, Christoph Görtz, Danny McGowan, Huyen Nguyen, Max Schröder
Economics Observatory,
June
2025
Abstract
Research using historical data from Northern Ireland indicates that house prices are higher in more diverse neighbourhoods. Housing policy should focus on regenerating neighbourhoods, improving public services and fostering social integration.
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12.06.2025 • 19/2025
Economic recovery in Germany – but structural problems and US trade policy weigh on the economy
The German economy has picked up somewhat in the first half of 2025. This was helped by the temporary increase in demand from the US in anticipation of higher tariffs. If the US does not escalate its trade conflicts further, production in Germany according to the summer forecast of the Halle Institute for Economic Research (IWH) is likely to increase a bit (by 0.4%) in 2025, after two years of decline. In March, the IWH economists were forecasting growth of 0.1% for the current year. Growth of 1.1% is forecast for the year 2026. Similar expansion rates are to be expected for East Germany.
Oliver Holtemöller
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21.05.2025 • 17/2025
Uncertainty Holds Back European Economy ‒ Report by AIECE, a Network of European Economic Research Institutes
The AIECE Association of European Economic Research Institutes has today published its bi-annual General Report, following the Spring 2025 Meeting held in Oslo hosted by Statistics Norway. The Halle Institute for Economic Research (IWH) is a long-time member of this network and regularly contributes its economic expertise to the joint analyses and forecasts. On average, AIECE member institutes forecast EU GDP to grow by of 1.2% in 2025 and 1.5% in 2026. The average forecast for Euro Area GDP growth is 1.0% and 1.3%. These forecasts are a bit more optimistic than those presented in the OECD's March 2025 Interim Report and the IMF's Spring 2025 World Economic Outlook.
Axel Lindner
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Social Connections and Information Leakage: Evidence from Target Stock Price Run-up in Takeovers
Iftekhar Hasan, Lin Tong, An Yan
Journal of Financial Research,
Vol. 48 (2),
2025
Abstract
Does information leakage in a target's social networks increase its stock price prior to a merger announcement? Evidence reveals that a target with more social connections indeed experiences a higher pre-announcement price run-up. This effect does not exist during or after the merger announcement, or in windows ending two months before the announcement. It is more pronounced among targets with severe asymmetric information, and weaker when the information about the upcoming merger is publicly available prior to the announcement. It is also weaker in expedited deals such as tender offers.
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