Conference Agenda
Overview and details of the sessions of this conference.
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Some information on the session logistics:
If not stated otherwise, the discussant is the following speaker, with the first speaker being the discussant of the last paper. The last speaker of each session is the session chair. (Exception: invited sessions)
Presenters should speak for no more than 20 minutes, and discussants should limit their remarks to no more than 5 minutes. The remaining time should be reserved for audience questions and the presenter’s responses. We suggest following these guidelines also in the (less common) 3-paper sessions in a 2-hour slot, to allow participants to move between sessions. Discussants are encouraged to avoid summarizing the paper. By focusing on a few questions and comments, the discussants can help start a broader discussion with the audience.
Only registered participants can attend this conference. Further information available on the congress website https://www.iseg.ulisboa.pt/en/event/iipf/ .
Venue address: ISEG - Lisbon School of Economics & Management, R. Francesinhas 21, 1200-675 Lisboa, Portugal
Please note that all times are shown in the time zone of the conference. The current conference time is: 17th Sept 2026, 11:37:42am WEST
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Daily Overview |
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B11: Informality and the Shadow Economy: Evidence and Measurement Location: Room 112 (Francesinhas 1) | |
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How (Not) To Ask About Undeclared Work: Estimating Prevalence And Patterns Using A Survey Experimental Approach Walter Eucken Institut, Germany Reliable estimates of undeclared work in Germany are scarce, yet they matter for tax and social security policy. Using two large-scale surveys (n=3,988) of the German general population and recipients of transfer benefits specifically, we elicit the prevalence of the supply and demand of undeclared work via direct questions, a crosswise model and a list experiment. We document substantial heterogeneity across sociodemographic groups that are in line with economic theory: Opportunity and incentives shape the decision to work undeclared. The self- and marginally employed as well as transfer recipients who face high effective marginal tax rates are particularly likely to work undeclared. The potential, especially for envelope wages, is substantial. We describe patterns of undeclared work in detail. The crosswise model consistently yields higher prevalence estimates for both supply and demand than direct questioning. We discuss assumptions and challenges when implementing list experiments.
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