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  Evaluation of the underreporting of income across households in Bulgaria: extending the Pissarides-Weber approach 

  Dybka, Piotr; Karska, Magdalena; Łopusińki, Maciej; Torój, Andrzej (2026-01)

  We estimate the personal income tax (PIT) gap in Bulgaria using the Pissarides and Weber (1989) methodology (“traces of true income” approach), which compares the relationship between food expenditure and income of ...
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  Beliefs That Move the Economy: Shocks to Firms’ and Households’ Inflation Expectations 

  Galiński, Paweł (2026-02)

  This paper examines shocks to inflation expectations and argues that distinguishing between households’ and firms’ expectations is crucial for understanding their macroeconomic role. First, using an analytical example, I ...
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  Czynniki sprzyjające implementacji koncepcji lean management w polskich szpitalach 

  Poznańska, Krystyna; Janiszewski, Jan M. (2025-12-22)

  Zadłużenie podmiotów w ochronie zdrowia w Polsce w ostatnim okresie wykazuje tendencję rosnącą, co wskazuje na konieczność poszukiwania rozwiązań przyczyniających się do minimalizacji ponoszonych przez nie kosztów. Tego ...
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  Locality, Universalism, and Modernity in khutbas for Polish Muslims 

  Chudziak, Mateusz; Górak-Sosnowska, Katarzyna; Krotofil, Joanna (2026)

  The article presents the results of research on sermons delivered in mosques belonging to three Polish Muslim organisations: Muslim Religious Union (MZR), Muslim League (LM), and Sakinah Foundation (FS). The analysis focuses ...
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  Measuring the sectoral VAT gap in Bulgaria: estimates and its drivers 

  Dybka, Piotr; Bartha, Stanisław; Komisarska, Anna; Kowalczuk, Michał (2026-01)

  The goal of this paper is to estimate the level and provide a sectoral decomposition of the VAT gap in Bulgaria based on the unique dataset provided by the National Revenue Agency in Bulgaria (NRA). We focus on the output ...

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