Optimizing Policymakers’ Loss Functions in Crisis Prediction: Before, Within or After?
Peter Sarlin, Gregor von Schweinitz
Macroeconomic Dynamics,
forthcoming
Abstract
Early-warning models most commonly optimize signaling thresholds on crisis probabilities. The expost threshold optimization is based upon a loss function accounting for preferences between forecast errors, but comes with two crucial drawbacks: unstable thresholds in recursive estimations and an in-sample overfit at the expense of out-of-sample performance. We propose two alternatives for threshold setting: (i) including preferences in the estimation itself and (ii) setting thresholds ex-ante according to preferences only. Given probabilistic model output, it is intuitive that a decision rule is independent of the data or model specification, as thresholds on probabilities represent a willingness to issue a false alarm vis-à-vis missing a crisis. We provide simulated and real-world evidence that this simplification results in stable thresholds and improves out-of-sample performance. Our solution is not restricted to binary-choice models, but directly transferable to the signaling approach and all probabilistic early-warning models.
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Should Forecasters Use Real‐time Data to Evaluate Leading Indicator Models for GDP Prediction? German Evidence
Katja Heinisch, Rolf Scheufele
German Economic Review,
forthcoming
Abstract
In this paper, we investigate whether differences exist among forecasts using real‐time or latest‐available data to predict gross domestic product (GDP). We employ mixed‐frequency models and real‐time data to reassess the role of surveys and financial data relative to industrial production and orders in Germany. Although we find evidence that forecast characteristics based on real‐time and final data releases differ, we also observe minimal impacts on the relative forecasting performance of indicator models. However, when obtaining the optimal combination of soft and hard data, the use of final release data may understate the role of survey information.
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Nowcasting East German GDP Growth: a MIDAS Approach
João Carlos Claudio, Katja Heinisch, Oliver Holtemöller
Empirical Economics,
No. 1,
2020
Abstract
Economic forecasts are an important element of rational economic policy both on the federal and on the local or regional level. Solid budgetary plans for government expenditures and revenues rely on efficient macroeconomic projections. However, official data on quarterly regional GDP in Germany are not available, and hence, regional GDP forecasts do not play an important role in public budget planning. We provide a new quarterly time series for East German GDP and develop a forecasting approach for East German GDP that takes data availability in real time and regional economic indicators into account. Overall, we find that mixed-data sampling model forecasts for East German GDP in combination with model averaging outperform regional forecast models that only rely on aggregate national information.
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Nowcasting East German GDP Growth: a MIDAS Approach
João Carlos Claudio, Katja Heinisch, Oliver Holtemöller
IWH Discussion Papers,
No. 24,
2019
Abstract
Economic forecasts are an important element of rational economic policy both on the federal and on the local or regional level. Solid budgetary plans for government expenditures and revenues rely on efficient macroeconomic projections. However, official data on quarterly regional GDP in Germany are not available, and hence, regional GDP forecasts do not play an important role in public budget planning. We provide a new quarterly time series for East German GDP and develop a forecasting approach for East German GDP that takes data availability in real time and regional economic indicators into account. Overall, we find that mixed-data sampling model forecasts for East German GDP in combination with model averaging outperform regional forecast models that only rely on aggregate national information.
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12.12.2019 • 24/2019
Global economy slowly gains momentum – but Germany still stuck in a downturn
In 2020, the global economy is likely to benefit from the recent thaw in trade disputes. Germany’s manufacturing sector, however, will recover only slowly. “In 2020, the German economy will probably grow at a rate of 1.1%, and adjusted for the unusually high number of working days the growth rate will only be 0.7%”, says Oliver Holtemöller, head of the Department Macroeconomics and vice president at Halle Institute for Economic Research (IWH). With an estimated growth rate of 1.3%, production in East Germany will outpace total German production growth.
Oliver Holtemöller
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Konjunktur aktuell: Weltwirtschaft wieder etwas kräftiger – aber Deutschland zunächst weiter im Abschwung
Konjunktur aktuell,
No. 4,
2019
Abstract
Im Jahr 2020 zieht die Weltwirtschaft wieder etwas an, weil der Gegenwind von den Handelskonflikten nachlässt. Die jüngsten Produktionsdaten deuten allerdings noch nicht auf eine durchgreifende Besserung der internationalen Konjunktur hin. Auch wegen der niedrigen Preisdynamik ist die Geldpolitik im Lauf des Jahres vielerorts noch einmal expansiver geworden. Wenn weitere Zollerhebungen im Wesentlichen ausbleiben, dürfte der Abschwung im Verarbeitenden Gewerbe um die Jahreswende 2019/2020 zu Ende gehen. Allerdings bleibt die Zukunft der politischen Rahmenbedingungen für den internationalen Handel unsicher. Das ist ein wichtiger Grund, warum mit einem kräftigen weltwirtschaftlichen Aufschwung für den Prognosezeitraum nicht zu rechnen ist. Zudem dürfte die Expansion der Nachfrage aus China weiter nachlassen.
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IWH-Flash-Indikator IV. Quartal 2019 und I. Quartal 2020
Katja Heinisch, Oliver Holtemöller, Axel Lindner, Birgit Schultz
One-off Publications,
No. 4,
2019
Abstract
Die Produktion in Deutschland hat nach einem Rückgang um 0,2% im zweiten Quartal 2019 im dritten Quartal zwar um 0,1% zugelegt, doch, damit bleibt die Expansionsrate weiterhin unter der Potenzialwachstumsrate zurück, und die Konjunktur dürfte nach Berechnungen des Leibniz-Instituts für Wirtschaftsforschung Halle (IWH) auch in den nächsten beiden Quartalen schwach bleiben. Der IWH-Flash-Indikator, der exklusiv für die WirtschaftsWoche berechnet wird, deutet darauf hin, dass die Wirtschaft im vierten Quartal 2019 stagnieren und im ersten Quartal 2020 um lediglich 0,1% zulegen wird (vgl. Abbildung 1).
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Industry in Recession — Growth Forces Dwindle
Claus Michelsen, Oliver Holtemöller, Torsten Schmidt, Stefan Kooths, Timo Wollmershäuser
Wirtschaftsdienst,
forthcoming
Abstract
The leading German economic research institutes have revised their economic forecast for Germany significantly downwards. The reasons for the weak development are the declining global demand for capital goods, which the German economy specialises in exporting, political uncertainty and structural changes in the automotive industry. Fiscal policy, on the other hand, is supporting macroeconomic expansion. Future development depends to a large extent on whether the trade conflicts can be resolved and how Brexit is structured.
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02.10.2019 • 21/2019
Thanks to robust domestic demand, the impact of the manufacturing sector on East Germany is less severe than in the west – Implications of the Autumn 2019 Joint Economic Forecast and official regional data for the eastern German economy
In its autumn report, the Joint Economic Forecast Project Group states that the German economy has cooled further in the current year. The manufacturing sector is the main reason for the economic weakness. This affects the economy in East Germany as well.
Oliver Holtemöller
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02.10.2019 • 20/2019
Joint Economic Forecast Autumn 2019: Economy Cools Further – Industry in Recession
Berlin, October 2, 2019 – Germany’s leading economics research institutes have revised their economic forecast for Germany significantly downward. Whereas in the spring they still expected gross domestic product (GDP) to grow by 0.8% in 2019, they now expect GDP growth to be only 0.5%. Reasons for the poor performance are the falling worldwide demand for capital goods – in the exporting of which the Germany economy is specialised – as well as political uncertainty and structural changes in the automotive industry. By contrast, monetary policy is shoring up macroeconomic expansion. For the coming year, the economic researchers have also reduced their forecast of GDP growth to 1.1%, having predicted 1.8% in the spring.
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