Skip to contents Jakubowski, Maciej [Author] ; Gajderowicz, Tomasz [Other]; Patrinos, Harry [Other] COVID-19, School Closures, and Student Learning Outcomes : New Global Evidence from PISA Books View online Schließen > Access Deutschlandweit zugänglich Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2024 Jakubowski, Maciej Analysis of the Predictive Power of PISA Test Items Articles View online Schließen > Access Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Paris : OECD Publishing, 2013. Published in: OECD Education Working Papers ; no.87 Jakubowski, Maciej [Author] ; Porta, Emilio Ernesto [Other]; Patrinos, Harry Anthony [Other]; Wisniewski, Jerzy [Other]; Jakubowski, Maciej [Other] The Impact of the 1999 Education Reform in Poland Books View online Schließen > Access Deutschlandweit zugänglich Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2010 ; 2010 Jakubowski, Maciej [Author] ; Patrinos, Harry A. [Other]; Porta, Emilio Ernesto [Other]; Wisniewski, Jerzy [Other] The Impact of the 1999 Education Reform in Poland Books View online Schließen > Access https://ssrn.com/abstract=1585062 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, [2017] Published in: World Bank Policy Research Working Paper ; No. 5263 Jakubowski, Maciej [Author] Analysis of the Predictive Power of PISA Test Items Books View online Schließen > Access Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Paris: OECD Publishing, 2013 Published in: OECD Education Working Papers ; no.87 Jakubowski, Maciej [Author] ; Adams, Ray [Other]; Berezner, Alla [Other] Analysis of PISA 2006 Preferred Items Ranking Using the Percent Correct Method Books View online Schließen > Access https://ssrn.com/abstract=1833217 Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, [2011] Jakubowski, Maciej [Author] Latent Variables and Propensity Score Matching Books View online Schließen > Access https://ssrn.com/abstract=1833215 Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, [2011] Published in: Warsaw Univ. Faculty of Economic Sciences Working Paper ; No. 6/2010 (29) Jakubowski, Maciej [Author] Teaching Quality and Decentralization Books View online Schließen > Access https://ssrn.com/abstract=1833212 Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, 2011 Published in: Warsaw Univ. Faculty of Economic Sciences Working Paper ; No. 15/2009 (15) Jakubowski, Maciej [Author] Implementing Value-Added Models of School Assessment Books View online Schließen > Access https://ssrn.com/abstract=1126776 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, 2008 Published in: EUI Working Paper ; No. RSCAS 2008/06 Patrinos, Harry Anthony [Author] ; Gajderowicz, Tomasz [Other]; Jakubowski, Maciej [Other] Evaluation of Educational Loss in Europe and Central Asia Books View online Schließen > Access Deutschlandweit zugänglich Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2023 Gajderowicz, Tomasz Janusz [Author] ; Jakubowski, Maciej Jan [Other] Jordan and Lebanon Performance in International Student Assessments Books View online Schließen > Access Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2022 Published in: Other Education Study Adams, Ray [Author] ; Berezner, Alla [Other]; Jakubowski, Maciej [Other] Analysis of PISA 2006 Preferred Items Ranking Using the Percent-Correct Method Books View online Schließen > Access Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Paris: OECD Publishing, 2010 Published in: OECD Education Working Papers ; no.46 Falkowski, Jan [Author] ; Jakubowski, Maciej [Other]; Strawinski, Pawel [Other] Returns from Income Strategies in Rural Poland Books View online Schließen > Access Full access (via DOI) https://ssrn.com/abstract=1833216 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, [2011] Published in: Univ. of Warsaw, Faculty of Economic Sciences Working Paper ; No. 5/2011 (45) Hippe, Ralph [Author]; Jakubowski, Maciej [Author] Expected early leaving among native and migrant students : evidence from PISA for EU Member States Books View online Schließen > Access https://www.cedefop.europa.eu/files/6216_en.pdf Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Luxembourg: Publications Office of the European Union, 2022 Published in: Working paper series ; 16 Hippe, Ralph [Author]; Jakubowski, Maciej [Author] Is student digital competence shaped by schools or individual factors? Books View online Schließen > Access Full access (via DOI) https://www.cedefop.europa.eu/files/6214_en.pdf Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Luxembourg: Publications Office of the European Union, 2022 Published in: Working paper series ; 14 Jakubowski, Maciej [Author]; Gajderowicz, Tomasz [Author] Student well-being factors : multilevel analysis of PISA 2015 international data Articles View online Schließen > Access https://www.doi.org/10.35808/ersj/1912 https://www.ersj.eu/journal/1912/download Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. 2020 Published in: European research studies ; 23(2020), 4, Seite 1312-1333 Gajderowicz, Tomasz [Author]; Jakubowski, Maciej [Author] What works for disadvantaged unemployed : private or public almp services? : evidence from Poland Articles View online Schließen > Access https://www.ersj.eu/journal/1522/download https://www.doi.org/10.35808/ersj/1522 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. 2019 Published in: European research studies ; 22(2019), 4, Seite 332-346 Gajderowicz, Tomasz [Author]; Jakubowski, Maciej [Author] ; Uniwersytet Warszawski Wydział Nauk Ekonomicznych What works for disadvantaged unemployed : private or public ALMP services? : evidence from (unplanned) RCT in Poland Books View online Schließen > Access https://www.wne.uw.edu.pl/files/3015/5311/5656/WNE_WP289.pdf Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Warsaw: University of Warsaw, Faculty of Economic Sciences, 2019 Published in: Working papers ; 2019,4 Jakubowski, Maciej [Author]; Sakowski, Paweł [Author] Quasi-Experimental Estimates of Class Size Effect in Primary Schools in Poland Books View online Schließen > Access Full access (via DOI) https://ssrn.com/abstract=1020687 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, 2007 Gajderowicz, Tomasz [Author] ; Harry Anthony, Patrinos [Other]; Jakubowski, Maciej [Other]; Wrona, Sylwia [Other] capturing the Educational and Economic Impacts of School Closures in Poland Books View online Schließen > Access Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2022
Jakubowski, Maciej [Author] ; Gajderowicz, Tomasz [Other]; Patrinos, Harry [Other] COVID-19, School Closures, and Student Learning Outcomes : New Global Evidence from PISA Books View online Schließen > Access Deutschlandweit zugänglich Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2024
Jakubowski, Maciej Analysis of the Predictive Power of PISA Test Items Articles View online Schließen > Access Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Paris : OECD Publishing, 2013. Published in: OECD Education Working Papers ; no.87
Jakubowski, Maciej [Author] ; Porta, Emilio Ernesto [Other]; Patrinos, Harry Anthony [Other]; Wisniewski, Jerzy [Other]; Jakubowski, Maciej [Other] The Impact of the 1999 Education Reform in Poland Books View online Schließen > Access Deutschlandweit zugänglich Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2010 ; 2010
Jakubowski, Maciej [Author] ; Patrinos, Harry A. [Other]; Porta, Emilio Ernesto [Other]; Wisniewski, Jerzy [Other] The Impact of the 1999 Education Reform in Poland Books View online Schließen > Access https://ssrn.com/abstract=1585062 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, [2017] Published in: World Bank Policy Research Working Paper ; No. 5263
Jakubowski, Maciej [Author] Analysis of the Predictive Power of PISA Test Items Books View online Schließen > Access Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Paris: OECD Publishing, 2013 Published in: OECD Education Working Papers ; no.87
Jakubowski, Maciej [Author] ; Adams, Ray [Other]; Berezner, Alla [Other] Analysis of PISA 2006 Preferred Items Ranking Using the Percent Correct Method Books View online Schließen > Access https://ssrn.com/abstract=1833217 Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, [2011]
Jakubowski, Maciej [Author] Latent Variables and Propensity Score Matching Books View online Schließen > Access https://ssrn.com/abstract=1833215 Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, [2011] Published in: Warsaw Univ. Faculty of Economic Sciences Working Paper ; No. 6/2010 (29)
Jakubowski, Maciej [Author] Teaching Quality and Decentralization Books View online Schließen > Access https://ssrn.com/abstract=1833212 Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, 2011 Published in: Warsaw Univ. Faculty of Economic Sciences Working Paper ; No. 15/2009 (15)
Jakubowski, Maciej [Author] Implementing Value-Added Models of School Assessment Books View online Schließen > Access https://ssrn.com/abstract=1126776 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, 2008 Published in: EUI Working Paper ; No. RSCAS 2008/06
Patrinos, Harry Anthony [Author] ; Gajderowicz, Tomasz [Other]; Jakubowski, Maciej [Other] Evaluation of Educational Loss in Europe and Central Asia Books View online Schließen > Access Deutschlandweit zugänglich Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2023
Gajderowicz, Tomasz Janusz [Author] ; Jakubowski, Maciej Jan [Other] Jordan and Lebanon Performance in International Student Assessments Books View online Schließen > Access Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2022 Published in: Other Education Study
Adams, Ray [Author] ; Berezner, Alla [Other]; Jakubowski, Maciej [Other] Analysis of PISA 2006 Preferred Items Ranking Using the Percent-Correct Method Books View online Schließen > Access Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Paris: OECD Publishing, 2010 Published in: OECD Education Working Papers ; no.46
Falkowski, Jan [Author] ; Jakubowski, Maciej [Other]; Strawinski, Pawel [Other] Returns from Income Strategies in Rural Poland Books View online Schließen > Access Full access (via DOI) https://ssrn.com/abstract=1833216 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, [2011] Published in: Univ. of Warsaw, Faculty of Economic Sciences Working Paper ; No. 5/2011 (45)
Hippe, Ralph [Author]; Jakubowski, Maciej [Author] Expected early leaving among native and migrant students : evidence from PISA for EU Member States Books View online Schließen > Access https://www.cedefop.europa.eu/files/6216_en.pdf Full access (via DOI) Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Luxembourg: Publications Office of the European Union, 2022 Published in: Working paper series ; 16
Hippe, Ralph [Author]; Jakubowski, Maciej [Author] Is student digital competence shaped by schools or individual factors? Books View online Schließen > Access Full access (via DOI) https://www.cedefop.europa.eu/files/6214_en.pdf Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Luxembourg: Publications Office of the European Union, 2022 Published in: Working paper series ; 14
Jakubowski, Maciej [Author]; Gajderowicz, Tomasz [Author] Student well-being factors : multilevel analysis of PISA 2015 international data Articles View online Schließen > Access https://www.doi.org/10.35808/ersj/1912 https://www.ersj.eu/journal/1912/download Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. 2020 Published in: European research studies ; 23(2020), 4, Seite 1312-1333
> Access https://www.doi.org/10.35808/ersj/1912 https://www.ersj.eu/journal/1912/download Show more show less
Gajderowicz, Tomasz [Author]; Jakubowski, Maciej [Author] What works for disadvantaged unemployed : private or public almp services? : evidence from Poland Articles View online Schließen > Access https://www.ersj.eu/journal/1522/download https://www.doi.org/10.35808/ersj/1522 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. 2019 Published in: European research studies ; 22(2019), 4, Seite 332-346
> Access https://www.ersj.eu/journal/1522/download https://www.doi.org/10.35808/ersj/1522 Show more show less
Gajderowicz, Tomasz [Author]; Jakubowski, Maciej [Author] ; Uniwersytet Warszawski Wydział Nauk Ekonomicznych What works for disadvantaged unemployed : private or public ALMP services? : evidence from (unplanned) RCT in Poland Books View online Schließen > Access https://www.wne.uw.edu.pl/files/3015/5311/5656/WNE_WP289.pdf Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Warsaw: University of Warsaw, Faculty of Economic Sciences, 2019 Published in: Working papers ; 2019,4
Jakubowski, Maciej [Author]; Sakowski, Paweł [Author] Quasi-Experimental Estimates of Class Size Effect in Primary Schools in Poland Books View online Schließen > Access Full access (via DOI) https://ssrn.com/abstract=1020687 Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. [S.l.]: SSRN, 2007
Gajderowicz, Tomasz [Author] ; Harry Anthony, Patrinos [Other]; Jakubowski, Maciej [Other]; Wrona, Sylwia [Other] capturing the Educational and Economic Impacts of School Closures in Poland Books View online Schließen > Access Show more show less Close > Bookmarks You can manage bookmarks using lists, please log in to your user account for this. Washington, D.C: The World Bank, 2022
> Media type Skip to next facet Articles (76) Wert ausschließen Books (28) Wert ausschließen Show more show less
> Rights information Skip to next facet Attribution (CC BY) (5) Wert ausschließen Show more show less
> Access State Skip to next facet Open Access (61) Wert ausschließen Without Specification (43) Wert ausschließen Show more show less
> Language Skip to next facet English (83) Wert ausschließen Not determined (21) Wert ausschließen Polish (1) Wert ausschließen Show more show less
> Subject Skip to next facet Technology (20) Wert ausschließen Physics (19) Wert ausschließen Chemistry and pharmacology (18) Wert ausschließen Medicine (12) Wert ausschließen Economics (9) Wert ausschließen Biology (8) Wert ausschließen Mathmatics (7) Wert ausschließen General (4) Wert ausschließen Geography (4) Wert ausschließen Sociology (4) Wert ausschließen Pedagogy (2) Wert ausschließen Show more show less
> Creator Skip to next facet Jakubowski, Maciej (58) Wert ausschließen Gajderowicz, Tomasz (19) Wert ausschließen Patrinos, Harry Anthony (11) Wert ausschließen Jakubowski, Jacek (10) Wert ausschließen Wiśniewolski, Maciej (10) Wert ausschließen Krychowiak, Maciej (8) Wert ausschließen Wrona, Sylwia (8) Wert ausschließen König, Ralf (7) Wert ausschließen Zhang, Daihong (7) Wert ausschließen Gao, Yu (6) Wert ausschließen Jakubowski, Marcin (6) Wert ausschließen Bozhenkov, Sergey (5) Wert ausschließen Doroszko, Adrian (5) Wert ausschließen Feng, Yuhe (5) Wert ausschließen Naujoks, Dirk (5) Wert ausschließen Niemann, Holger (5) Wert ausschließen Szahidewicz-Krupska, Ewa (5) Wert ausschließen Brezinsek, Sebastijan (4) Wert ausschließen Długosz, Ewa (4) Wert ausschließen Fellinger, Joris (4) Wert ausschließen Fuchert, Golo (4) Wert ausschließen Jakubowski, Tadeusz (4) Wert ausschließen Jakubowski, Wieslaw (4) Wert ausschließen Klockiewicz, Maciej (4) Wert ausschließen Patrinos, Harry A. (4) Wert ausschließen Porta, Emilio Ernesto (4) Wert ausschließen Rahbarnia, Kian (4) Wert ausschließen Turek-Jakubowska, Aleksandra (4) Wert ausschließen Adams, Ray (3) Wert ausschließen Baldzuhn, Jürgen (3) Wert ausschließen Berezner, Alla (3) Wert ausschließen Buttenschön, Birger (3) Wert ausschließen Dobruch-Sobczak, Katarzyna (3) Wert ausschließen Drewelow, Peter (3) Wert ausschließen Drucker, Luca Flóra (3) Wert ausschließen Endler, Michael (3) Wert ausschließen Frerichs, Heinke (3) Wert ausschließen Geiger, Joachim (3) Wert ausschließen Gradic, Dorothea (3) Wert ausschließen Horn, Dániel (3) Wert ausschließen Jakubowski, Wiesław (3) Wert ausschließen Kornejew, Petra (3) Wert ausschließen Kremeyer, Thierry (3) Wert ausschließen Langenberg, Andreas (3) Wert ausschließen Otte, Matthias (3) Wert ausschließen Pablant, Novimir (3) Wert ausschließen Perseo, Valeria (3) Wert ausschließen Pisano, Fabio (3) Wert ausschließen Schlisio, Georg (3) Wert ausschließen Schmitz, Oliver (3) Wert ausschließen Sunn Pedersen, Thomas (3) Wert ausschließen Wenzel, Uwe (3) Wert ausschließen Winters, Victoria (3) Wert ausschließen Wisniewski, Jerzy (3) Wert ausschließen Wysocki, Maciej (3) Wert ausschließen Anna Trzebińska (2) Wert ausschließen Barbui, Tullio (2) Wert ausschließen Beranek, Robert (2) Wert ausschließen Biedermann, Christoph (2) Wert ausschließen Borgonovi, Francesca (2) Wert ausschließen Bosch, Hans-Stephan (2) Wert ausschließen Brunner, Kai Jakob (2) Wert ausschließen Chybicka, Alicja (2) Wert ausschließen Derkacz, Arkadiusz (2) Wert ausschließen Dhard, Chandra Prakash (2) Wert ausschließen Dinklage, Andreas (2) Wert ausschließen Dębski, Janusz (2) Wert ausschließen Effenberg, Florian (2) Wert ausschließen Falkowski, Jan (2) Wert ausschließen Gajderowicz, Tomasz Janusz (2) Wert ausschließen Gawryś, Jakub (2) Wert ausschließen Gawryś, Karolina (2) Wert ausschließen Gazicki-Lipman, Maciej (2) Wert ausschließen Grulke, Olaf (2) Wert ausschließen Hartmann, Dirk (2) Wert ausschließen Hippe, Ralph (2) Wert ausschließen Höfel, Udo (2) Wert ausschließen Jakubowski, Lucjusz (2) Wert ausschließen Jakubowski, Maciej Jan (2) Wert ausschließen Jakubowski, Marcin W. (2) Wert ausschließen Jakubowski, Witold (2) Wert ausschließen Jędrzejowski, Maciej (2) Wert ausschließen Katarzyna Dobruch-Sobczak (2) Wert ausschließen Kazakov, Yevgen (2) Wert ausschließen Knauer, Jens (2) Wert ausschließen Mazur, Grzegorz (2) Wert ausschließen Mazurczak, Agnieszka (2) Wert ausschließen McNeely, Paul (2) Wert ausschließen Niedzielska, Ewa (2) Wert ausschließen Pajk, Anna M. (2) Wert ausschließen Pasch, Ekkehard (2) Wert ausschließen Patrinos, Harry (2) Wert ausschließen Pavone, Andrea (2) Wert ausschließen Pedersen, Thomas Sunn (2) Wert ausschließen Pokropek, Artur (2) Wert ausschließen Porwolik, Julita (2) Wert ausschließen Postolski, Maciej (2) Wert ausschließen Reimold, Felix (2) Wert ausschließen Rudischhauser, Lukas (2) Wert ausschließen Rust, Norbert (2) Wert ausschließen Show more show less
> Collection Skip to next facet Verbunddaten SWB (23) Wert ausschließen Lizenzfreie Online-Ressourcen (21) Wert ausschließen Elsevier BV (CrossRef) (15) Wert ausschließen Springer Science and Business Media LLC (CrossRef) (10) Wert ausschließen BASE - Bielefeld Academic Search Engine (5) Wert ausschließen IOP Publishing (CrossRef) (5) Wert ausschließen World Bank E-Library Archive (5) Wert ausschließen EconStor (German National Library of Economics, ZBW) (4) Wert ausschließen Walter de Gruyter GmbH (CrossRef) (4) Wert ausschließen Wiley (CrossRef) (4) Wert ausschließen DOAJ Directory of Open Access Journals (3) Wert ausschließen Informa UK Limited (CrossRef) (3) Wert ausschließen MDPI AG (CrossRef) (3) Wert ausschließen Medical Communications Sp. z.o.o. (CrossRef) (3) Wert ausschließen OpenEdition (CrossRef) (3) Wert ausschließen Hindawi Limited (CrossRef) (2) Wert ausschließen Institute of Mathematics, Polish Academy of Sciences (CrossRef) (2) Wert ausschließen VM Media SP. zo.o VM Group SK (CrossRef) (2) Wert ausschließen American Mathematical Society (AMS) (CrossRef) (1) Wert ausschließen Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) (1) Wert ausschließen Frontiers Media SA (CrossRef) (1) Wert ausschließen ISMA SYC INT (CrossRef) (1) Wert ausschließen Institute of Rural Health (CrossRef) (1) Wert ausschließen JSTOR Arts & Sciences VII Archive (1) Wert ausschließen JSTOR Mathematics & Statistics (1) Wert ausschließen Japan Society of Plasma Science and Nuclear Fusion Research (CrossRef) (1) Wert ausschließen OECD iLibrary (1) Wert ausschließen Public Library of Science (PLoS) (CrossRef) (1) Wert ausschließen SAGE Publications (CrossRef) (1) Wert ausschließen SSOAR Social Science Open Access Repository (1) Wert ausschließen Warsaw School of Economics (CrossRef) (1) Wert ausschließen Wroclaw University of Economics and Business (CrossRef) (1) Wert ausschließen Show more show less