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, 11:40:59am WEST
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Daily Overview |
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B11: Informality and the Shadow Economy: Evidence and Measurement
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What Drives the Timing Of Retirement Planning? 1: Jönköping University, Sweden; 2: CESifo This paper studies retirement planning using unique administrative data from Sweden's national pension dashboard. These data allow us to observe forward-looking planning behavior directly by capturing when individuals simulate their future pension outcomes. We find that engagement increases sharply with age and peaks close to the retirement margin, indicating that many individuals postpone planning until decisions become imminent. It is also unevenly distributed: individuals with higher education and higher disposable income are substantially likelier to use the dashboard, both in terms of access and intensity. Planning further responds to major life events, with transitions such as widowhood, entry into unemployment, and large income changes associated with higher engagement. Finally, pre-retirement engagement is associated with a greater tendency to combine continued work with pension claiming.
Institutional Quality and the Shadow Economy: The Role of VAT Revenue Performance across Country Income Groups 1: Johannes Kepler University of Linz, Austria; 2: Estonian Academy of Security Sciences and Estonian Business School This paper examines the determinants of shadow economy size with a focus on institutional quality, using data from 165 countries for 2020-2023. We propose two proxies for institutional quality: novel indicator Value Added Tax revenue performance (VAT revenues as a percentage of GDP), and the Government Services Efficiency index (GSE). By using VAT revenue performance, we extend the existing literature beyond its conventional focus on VAT standard rates. We estimate regression models in which the size of the shadow economy is related to VAT revenues as a share of GDP, the VAT standard rate, trade openness, GDP per capita and GSE. Overall, we found that VAT revenue performance is a valid proxy for institutional quality at the cross-country level. We empirically confirm that both VAT revenue performance and GSE serve as reliable proxies for institutional quality.
Informality, Incidence and Pass-through of VAT Exemptions 1: University of Melbourne; 2: World Bank; 3: UC Santa Barbara We study the pass-through and distributional incidence of Value Added Tax (VAT) exemptions on food in a lower-income country with very high informality. Exploiting the unanticipated removal of VAT on selected items, we combine administrative data, a monthly census of supermarket prices, web-scraped online prices, and a nationally representative monthly phone-survey panel. Using difference-in-differences, we estimate pass-through from price changes for exempt versus non-exempt items and measure incidence using household expenditure, quantities, and purchase locations. Pass-through is complete in formal supermarkets in central urban areas, but price reductions are limited elsewhere. This spatial heterogeneity is strongly correlated with local store competition. VAT exemptions are highly regressive: for each dollar of foregone revenue, only five cents reach the poorest quintile, reflecting lower purchases from formal stores in urban areas, greater subsistence, and lower consumption. Compared to forecasts from 237 economists, we show experts misjudge pass-through and overstate benefits for the poor.
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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