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Experimental Evidence on Panel Conditioning Effects when Increasing the Surveying Frequency in a Probability-Based Online Panel

We investigate panel conditioning effects in a long-running probability-based online panel of the general population through a large-scale experiment conducted in 2020. Our experiment was specifically designed to study the effect of intensifying the surveying frequency for the treatment group (N = 5,598 panel members) during a 16-week corona study while keeping the control group (N = 799 panel members) ...

Explaining the Absence of Climate Change Integration in Low-Carbon Sectoral Policies: An Analysis of Brazil’s Maritime Cabotage Policy

Although maritime cabotage emits comparatively less CO2 per tonne kilometre than other means of transportation, the potential contribution of Brazil’s cabotage policy toward tackling climate change remained largely unexplored throughout its legislative process. Hence, to gather insights into how climate change can be integrated into sectoral policies, we apply Kingdon’s Multiple Streams Framework (MSF) ...

SOEP-Core v38.1 – COGDJ

Measurement Instruments for Fast and Frequent Data Collection during the Early Phase of COVID-19 in Germany: Reflections on the Mannheim Corona Study

The outbreak of the COVID-19 pandemic has led to a vast increase in the demand for fast, frequent, and multi-faceted data to study the impact of the pandemic on people’s lives. Existing data collection infrastructures had to be adapted quickly during the early phase of the pandemic to meet this data demand. Our research group contributed to this by conducting the Mannheim Corona Study (MCS), a longitudinal ...

Sanctions against Russian Gas Would Not Endanger EU or German Gas Supply

As a result of the Russian attack on Ukraine, natural gas prices skyrocketed in 2022 and Germany in particular felt the impact of its strong dependency on Russia. Prices have since relaxed, the European natural gas industry has overcome the uncertainty due to the energy crisis in 2022, and the industry also survived the slump in Russian natural gas imports without supply interruptions. However, Russia ...

Bridges over Troubled Waters: Climate Clubs, Alliances, and Partnerships as Safeguards for Effective International Cooperation?

Driven by the motivation to raise the ambition level of climate action and to foster the transformation of economies, current climate policy discourse revolves around ways to improve cooperation between industrialized countries and emerging economies. We identify three broad types of initiatives—multilateral-cross sectoral, multilateral, sector specific, and climate and development partnerships—and ...

Validating an Index of Selection Bias for Proportions in Non-probability Samples

Fast online surveys without sampling frames are becoming increasingly important in survey research. Their recruitment methods result in non-probability samples. As the mechanism of data generation is always unknown in such samples, the problem of non-ignorability arises making vgeneralisation of calculated statistics to the population of interest highly questionable. Sensitivity analyses provide a ...

The Evolution of Theories of Harm in EU Merger Control

We discuss the main Theories of Harm in EU merger control and their evolution since the 1990s. We present stylised facts and trends using data extracted from EU merger decisions by natural language processing tools. EU merger policy has adapted over time, both in terms of legislation and theories of harm, as well as in terms of the investigative tools and evidence used. The introduction of the new ...

SOEP publishes Annual Report 2023 - Scope and successes of the longest-running household survey - High-caliber research projects launched

What is the state of poverty and social cohesion in Germany? What about the integration of Ukrainian refugees? How has people's mental health developed over the last 20 years? In 2023, researchers from the Socio-Economic Panel (SOEP) once again used its long-term panel data to conduct research on a wide range of topics relating to social change in Germany. In the 2023 annual report, SOEP looks back ...

Taxonomies channel financial flows into sustainable economic activities