Meta-Analysis in Economics
These are publications indexed on RePEc about the above topic. This reading list is managed by Tomas Havranek (who can update the reading list here). You can also create your own reading list here. This page is updated in the first days of each month, at least.Based on a list by the Meta-Analysis of Economic Research Network
Relevant JEL codes for this reading list are:
These are authors registered on RePEc who are particularly relevant to this topic:
- Pedro Duarte Bom
- Abel Brodeur
- Stephan B. Bruns
- Nauro F. Campos
- Chris Doucouliagos
- Graham Elliott
- Jarko Fidrmuc
- Jerome Geyer-Klingeberg
- Zuzana Irsova
- Ichiro Iwasaki
- Robert J. Johnston
- Maximilian Kasy
- Jon P. Nelson
- Martin Paldam
- Jacques Poot
- W. Robert Reed
- T. D. Stanley
- Mehmet Ugur
2013
- Feld, Lars P. & Heckemeyer, Jost H. & Overesch, Michael, 2013.
"Capital structure choice and company taxation: A meta-study,"
Journal of Banking & Finance, Elsevier, vol. 37(8), pages 2850-2866.
- Feld, Lars P. & Heckemeyer, Jost H. & Overesch, Michael, 2011. "Capital structure choice and company taxation: A meta-study," ZEW Discussion Papers 11-075, ZEW - Leibniz Centre for European Economic Research.
- Lars P. Feld & Jost Henrich Heckemeyer & Michael Overesch, 2011. "Capital Structure Choice and Company Taxation: A Meta-Study," CESifo Working Paper Series 3400, CESifo.
- Marek Rusnak & Tomas Havranek & Roman Horvath, 2013.
"How to Solve the Price Puzzle? A Meta-Analysis,"
Journal of Money, Credit and Banking, Blackwell Publishing, vol. 45(1), pages 37-70, February.
- Marek Rusnak & Tomas Havranek & Roman Horvath, 2013. "How to Solve the Price Puzzle? A Meta‐Analysis," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 45(1), pages 37-70, February.
- Marek Rusnak & Tomas Havranek & Roman Horvath, 2011. "How to Solve the Price Puzzle? A Meta-Analysis," CERGE-EI Working Papers wp446, The Center for Economic Research and Graduate Education - Economics Institute, Prague.
- Marek Rusnak & Tomas Havranek & Roman Horvath, 2011. "How to Solve the Price Puzzle? A Meta-Analysis," Working Papers 2011/02, Czech National Bank.
- Marek Rusnák & Tomáš Havránek & Roman Horváth, 2011. "How to Solve the Price Puzzle? A Meta-Analysis," Working Papers IES 2011/24, Charles University Prague, Faculty of Social Sciences, Institute of Economic Studies, revised Jul 2011.
- T.D. Stanley & Hristos Doucouliagos & Margaret Giles & Jost H. Heckemeyer & Robert J. Johnston & Patrice Laroche & Jon P. Nelson & Martin Paldam & Jacques Poot & Geoff Pugh & Randall S. Rosenberger & , 2013.
"Meta-Analysis Of Economics Research Reporting Guidelines,"
Journal of Economic Surveys, Wiley Blackwell, vol. 27(2), pages 390-394, April.
- T.D. Stanley & Hristos Doucouliagos & Margaret Giles & Jost H. Heckemeyer & Robert J. Johnston & Patrice Laroche & Jon P. Nelson & Martin Paldam & Jacques Poot & Geoff Pugh & Randall S. Rosenberger & , 2013. "Meta-analysis of Economics Research Reporting Guidelines," Post-Print hal-01369455, HAL.
- Chris Doucouliagos & T.D. Stanley, 2013. "Are All Economic Facts Greatly Exaggerated? Theory Competition And Selectivity," Journal of Economic Surveys, Wiley Blackwell, vol. 27(2), pages 316-339, April.
2014
- Doucouliagos, Hristos & Stanley, T.D. & Viscusi, W. Kip, 2014. "Publication selection and the income elasticity of the value of a statistical life," Journal of Health Economics, Elsevier, vol. 33(C), pages 67-75.
- Benos, Nikos & Zotou, Stefania, 2014.
"Education and Economic Growth: A Meta-Regression Analysis,"
World Development, Elsevier, vol. 64(C), pages 669-689.
- Benos, Nikos & Zotou, Stefania, 2013. "Education and Economic Growth: A Meta-Regression Analysis," MPRA Paper 46143, University Library of Munich, Germany.
- Nelson, Jon P., 2014. "Estimating the price elasticity of beer: Meta-analysis of data with heterogeneity, dependence, and publication bias," Journal of Health Economics, Elsevier, vol. 33(C), pages 180-187.
- Mehmet Ugur, 2014.
"Corruption'S Direct Effects On Per-Capita Income Growth: A Meta-Analysis,"
Journal of Economic Surveys, Wiley Blackwell, vol. 28(3), pages 472-490, July.
- Ugur, Mehmet, 2013. "Corruption’s direct effects on per-capita income growth: a meta-analysis," Greenwich Papers in Political Economy 10180, University of Greenwich, Greenwich Political Economy Research Centre.
- Iwasaki, Ichiro & Tokunaga, Masahiro, 2014. "Macroeconomic Impacts of FDI in Transition Economies: A Meta-Analysis," World Development, Elsevier, vol. 61(C), pages 53-69.
2015
- Lichter, Andreas & Peichl, Andreas & Siegloch, Sebastian, 2015.
"The own-wage elasticity of labor demand: A meta-regression analysis,"
European Economic Review, Elsevier, vol. 80(C), pages 94-119.
- Lichter, Andreas & Peichl, Andreas & Siegloch, Sebastian, 2014. "The Own-Wage Elasticity of Labor Demand: A Meta-Regression Analysis," IZA Discussion Papers 7958, Institute of Labor Economics (IZA).
- Lichter, Andreas & Peichl, Andreas & Siegloch, Sebastian, 2014. "The own-wage elasticity of labor demand: A meta-regression analysis," ZEW Discussion Papers 14-016, ZEW - Leibniz Centre for European Economic Research.
- Reed, W. Robert, 2015.
"A Monte Carlo analysis of alternative meta-analysis estimators in the presence of publication bias,"
Economics - The Open-Access, Open-Assessment E-Journal, Kiel Institute for the World Economy (IfW), vol. 9, pages 1-40.
- Reed, W. Robert & Florax, Raymond J. G. M. & Poot, Jacques, 2015. "A Monte Carlo analysis of alternative meta-analysis estimators in the presence of publication bias," Economics Discussion Papers 2015-9, Kiel Institute for the World Economy (IfW).
- W. Robert Reed & Raymond J.G.M. Florax & Jacques Poot, 2014. "A Monte Carlo Analysis of Alternative Meta-Analysis Estimators in the Presence of Publication Bias," Working Papers in Economics 14/22, University of Canterbury, Department of Economics and Finance.
- Havranek, Tomas & Horvath, Roman & Irsova, Zuzana & Rusnak, Marek, 2015.
"Cross-country heterogeneity in intertemporal substitution,"
Journal of International Economics, Elsevier, vol. 96(1), pages 100-118.
- Tomas Havranek & Roman Horvath & Zuzana Irsova & Marek Rusnak, 2014. "Cross-Country Heterogeneity in Intertemporal Substitution," Working Papers 2014/06, Czech National Bank.
- Tomas Havranek & Roman Horvath & Zuzana Irsova & Marek Rusnak, 2013. "Cross-Country Heterogeneity in Intertemporal Substitution," William Davidson Institute Working Papers Series wp1056, William Davidson Institute at the University of Michigan.
- Tomas Havranek & Roman Horvath & Zuzana Irsova & Marek Rusnak, 2013. "Cross-Country Heterogeneity in Intertemporal Substitution," Working Papers IES 2013/11, Charles University Prague, Faculty of Social Sciences, Institute of Economic Studies, revised Aug 2013.
- Paldam, Martin, 2015.
"Meta-analysis in a nutshell: Techniques and general findings,"
Economics - The Open-Access, Open-Assessment E-Journal, Kiel Institute for the World Economy (IfW), vol. 9, pages 1-14.
- Paldam, Martin, 2015. "Meta-analysis in a nutshell: Techniques and general findings," Economics Discussion Papers 2015-3, Kiel Institute for the World Economy (IfW).
- Tomáš Havránek, 2015. "Measuring Intertemporal Substitution: The Importance Of Method Choices And Selective Reporting," Journal of the European Economic Association, European Economic Association, vol. 13(6), pages 1180-1204, December.
2016
- Abel Brodeur & Mathias Lé & Marc Sangnier & Yanos Zylberberg, 2016.
"Star Wars: The Empirics Strike Back,"
American Economic Journal: Applied Economics, American Economic Association, vol. 8(1), pages 1-32, January.
- Abel Brodeur & Mathias Lé & Marc Sangnier & Yanos Zylberberg, 2015. "Star Wars: The Empirics Strike Back," PSE Working Papers halshs-01158500, HAL.
- Abel Brodeur & Mathias Lé & Marc Sangnier & Yanos Zylberberg, 2015. "Star Wars: The Empirics Strike Back," Working Papers halshs-01158500, HAL.
- Abel Brodeur & Mathias Lé & Marc Sangnier & Yanos Zylberberg, 2016. "Star Wars: The Empirics Strike Back," PSE-Ecole d'économie de Paris (Postprint) hal-01447851, HAL.
- Abel Brodeur & Mathias Lé & Marc Sangnier & Yanos Zylberberg, 2012. "Star wars: The empirics strike back," Working Papers halshs-00710122, HAL.
- Abel Brodeur & Mathias Lé & Marc Sangnier & Yanos Zylberberg, 2015. "Star Wars: The Empirics Strike Back," AMSE Working Papers 1523, Aix-Marseille School of Economics, France, revised May 2015.
- Abel Brodeur & Mathias Lé & Marc Sangnier & Yanos Zylberberg, 2015. "Star Wars: The Empirics Strike Back," Working Papers 1505E, University of Ottawa, Department of Economics.
- Abel Brodeur & Mathias Lé & Marc Sangnier & Yanos Zylberberg, 2016. "Star Wars: The Empirics Strike Back," Post-Print hal-01447851, HAL.
- Abel Brodeur & Mathias Lé & Marc Sangnier & Yanos Zylberberg, 2012. "Star wars: The empirics strike back," PSE Working Papers halshs-00710122, HAL.
- Brodeur, Abel & Lé, Mathias & Sangnier, Marc & Zylberberg, Yanos, 2013. "Star Wars: The Empirics Strike Back," IZA Discussion Papers 7268, Institute of Labor Economics (IZA).
- Havranek, Tomas & Horvath, Roman & Zeynalov, Ayaz, 2016.
"Natural Resources and Economic Growth: A Meta-Analysis,"
World Development, Elsevier, vol. 88(C), pages 134-151.
- Tomas Havranek & Roman Horvath & Ayaz Zeynalov, 2016. "Natural Resources and Economic Growth: A Meta-Analysis," Working Papers 2016/01, Czech National Bank.
- Tomas Havranek & Roman Horvath & Ayaz Zeynalov, 2016. "Natural Resources and Economic Growth: A Meta-Analysis," Working Papers IES 2016/03, Charles University Prague, Faculty of Social Sciences, Institute of Economic Studies, revised Jan 2016.
- Tomas Havranek & Roman Horvath & Ayaz Zeynalov, 2015. "Natural Resources and Economic Growth : A Meta-Analysis," Working Papers 350, Leibniz Institut für Ost- und Südosteuropaforschung (Institute for East and Southeast European Studies).
- Lane, Tom, 2016. "Discrimination in the laboratory: A meta-analysis of economics experiments," European Economic Review, Elsevier, vol. 90(C), pages 375-402.
- Campbell R. Harvey & Yan Liu & Heqing Zhu, 2016. "Editor's Choice … and the Cross-Section of Expected Returns," Review of Financial Studies, Society for Financial Studies, vol. 29(1), pages 5-68.
- Michal Bauer & Christopher Blattman & Julie Chytilová & Joseph Henrich & Edward Miguel & Tamar Mitts, 2016.
"Can War Foster Cooperation?,"
Journal of Economic Perspectives, American Economic Association, vol. 30(3), pages 249-274, Summer.
- Michal Bauer & Christopher Blattman & Julie Chytilová & Joseph Henrich & Edward Miguel & Tamar Mitts, 2016. "Can War Foster Cooperation?," NBER Working Papers 22312, National Bureau of Economic Research, Inc.
- Bauer, Michal & Blattman, Christopher & Chytilova, Julie & Henrich, Joseph & Miguel, Edward & Mitts, Tamar, 2016. "Can War Foster Cooperation?," CEPR Discussion Papers 11327, C.E.P.R. Discussion Papers.
- Bauer, Michal & Blattman, Christopher J. & Chytilová, Julie & Henrich, Joseph & Miguel, Edward & Mitts, Tamar, 2016. "Can War Foster Cooperation?," IZA Discussion Papers 9997, Institute of Labor Economics (IZA).
- Michal Bauer & Christopher Blattman & Julie Chytilová & Joseph Henrich & Edward Miguel & Tamar Mitts, 2016. "Can War Foster Cooperation?," HiCN Working Papers 224, Households in Conflict Network.
2017
- John P. A. Ioannidis & T. D. Stanley & Hristos Doucouliagos, 2017. "The Power of Bias in Economics Research," Economic Journal, Royal Economic Society, vol. 127(605), pages 236-265, October.
- Labandeira, Xavier & Labeaga, José M. & López-Otero, Xiral, 2017.
"A meta-analysis on the price elasticity of energy demand,"
Energy Policy, Elsevier, vol. 102(C), pages 549-568.
- Xavier Labandeira & José M.aría Labeaga & Xiral López-Otero, 2015. "A meta-analysis on the price elasticity of energy demand," Working Papers 04-2015, Economics for Energy.
- Tomas Havranek & Zuzana Irsova, 2017.
"Do Borders Really Slash Trade? A Meta-Analysis,"
IMF Economic Review, Palgrave Macmillan;International Monetary Fund, vol. 65(2), pages 365-396, June.
- Tomas Havranek & Zuzana Irsova, 2015. "Do Borders Really Slash Trade? A Meta-Analysis," Working Papers 2015/01, Czech National Bank.
- Tomas Havranek & Zuzana Irsova, 2015. "Do Borders Really Slash Trade? A Meta-Analysis," William Davidson Institute Working Papers Series wp1088, William Davidson Institute at the University of Michigan.
- Tomas Havranek & Zuzana Irsova, 2015. "Do Borders Really Slash Trade? A Meta-Analysis," Working Papers IES 2015/03, Charles University Prague, Faculty of Social Sciences, Institute of Economic Studies, revised Feb 2015.
- Havranek, Tomas & Rusnak, Marek & Sokolova, Anna, 2017.
"Habit formation in consumption: A meta-analysis,"
European Economic Review, Elsevier, vol. 95(C), pages 142-167.
- Tomas Havranek & Marek Rusnak & Anna Sokolova, 2015. "Habit Formation in Consumption: A Meta-Analysis," Working Papers 2015/03, Czech National Bank.
- Tomas Havranek & Marek Rusnak & Anna Sokolova, 2015. "Habit Formation in Consumption: A Meta-Analysis," Working Papers IES 2015/15, Charles University Prague, Faculty of Social Sciences, Institute of Economic Studies, revised May 2015.
- Gunby, Philip & Jin, Yinghua & Robert Reed, W., 2017.
"Did FDI Really Cause Chinese Economic Growth? A Meta-Analysis,"
World Development, Elsevier, vol. 90(C), pages 242-255.
- Philip Gunby & Yinghua Jin & W. Robert Reed, 2015. "Did FDI Really Cause Chinese Economic Growth? A Meta-Analysis," Working Papers in Economics 15/16, University of Canterbury, Department of Economics and Finance.
- Philip Gunby & Yinghua Jin & W. Robert Reed, 2016. "Did FDI Really Cause Chinese Economic Growth? A Meta-Analysis," Working Papers in Economics 16/15, University of Canterbury, Department of Economics and Finance.
2018
- David Card & Jochen Kluve & Andrea Weber, 2018.
"What Works? A Meta Analysis of Recent Active Labor Market Program Evaluations,"
Journal of the European Economic Association, European Economic Association, vol. 16(3), pages 894-931.
- Card, David & Kluve, Jochen & Weber, Andrea, 2015. "What Works? A Meta Analysis of Recent Active Labor Market Program Evaluations," IZA Discussion Papers 9236, Institute of Labor Economics (IZA).
- David Card & Jochen Kluve & Andrea Weber, 2015. "What Works? A Meta Analysis of Recent Active Labor Market Program Evaluations," NBER Working Papers 21431, National Bureau of Economic Research, Inc.
- Card, David & Kluve, Jochen & Weber, Andrea, 2015. "What works? A meta analysis of recent active labor market program evaluations," Ruhr Economic Papers 572, RWI - Leibniz-Institut für Wirtschaftsforschung, Ruhr-University Bochum, TU Dortmund University, University of Duisburg-Essen.
- Tomas Havranek & Zuzana Irsova & Olesia Zeynalova, 2018. "Tuition Fees and University Enrolment: A Meta‐Regression Analysis," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 80(6), pages 1145-1184, December.
- Tomas Havranek, Dominik Herman, and Zuzana Irsova, 2018. "Does Daylight Saving Save Electricity? A Meta-Analysis," The Energy Journal, International Association for Energy Economics, vol. 0(Number 2).
- Anderson, Edward & d'Orey, Maria Ana Jalles & Duvendack, Maren & Esposito, Lucio, 2018. "Does Government Spending Affect Income Poverty? A Meta-regression Analysis," World Development, Elsevier, vol. 103(C), pages 60-71.
2019
- Isaiah Andrews & Maximilian Kasy, 2019.
"Identification of and Correction for Publication Bias,"
American Economic Review, American Economic Association, vol. 109(8), pages 2766-2794, August.
- Isaiah Andrews & Maximilian Kasy, 2017. "Identification of and Correction for Publication Bias," NBER Working Papers 23298, National Bureau of Economic Research, Inc.
- Kasy, Maximilian & Andrews, Isaiah, 2018. "Identification of and correction for publication bias," MetaArXiv 49yst, Center for Open Science.
- Isaiah Andrews & Maximilian Kasy, 2017. "Identification of and correction for publication bias," Papers 1711.10527, arXiv.org.
- Furukawa, Chishio, 2019. "Publication Bias under Aggregation Frictions: Theory, Evidence, and a New Correction Method," EconStor Preprints 194798, ZBW - Leibniz Information Centre for Economics.
- Stanley, T. D. & Doucouliagos, Chris, 2019. "Practical Significance, Meta-Analysis and the Credibility of Economics," IZA Discussion Papers 12458, Institute of Labor Economics (IZA).
- Kvarven, Amanda & Strømland, Eirik & Johannesson, Magnus, 2019. "Identification of and Correction for Publication Bias: Comment," MetaArXiv dh87m, Center for Open Science.
- Graham Elliott & Nikolay Kudrin & Kaspar Wuthrich, 2019. "Detecting p-hacking," Papers 1906.06711, arXiv.org, revised Nov 2020.
- Ahlfeldt, Gabriel M. & Pietrostefani, Elisabetta, 2019.
"The economic effects of density: A synthesis,"
Journal of Urban Economics, Elsevier, vol. 111(C), pages 93-107.
- Ahlfeldt, Gabriel & Pietrostefani, Elisabetta, 2019. "The economic effects of density: A synthesis," CEPR Discussion Papers 13440, C.E.P.R. Discussion Papers.
- Ahlfeldt, Gabriel M. & Pietrostefani, Elisabetta, 2017. "The economic effects of density: A synthesis," LSE Research Online Documents on Economics 83628, London School of Economics and Political Science, LSE Library.
- Ahlfeldt, Gabriel M. & Pietrostefani, Elisabetta, 2019. "The economic effects of density: a synthesis," LSE Research Online Documents on Economics 100004, London School of Economics and Political Science, LSE Library.
- Gabriel M. Ahlfeldt & Elisabetta Pietrostefani, 2017. "The Economic Effects of Density: A Synthesis," SERC Discussion Papers 0210, Spatial Economics Research Centre, LSE.
- Gabriel Ahlfeldt & Elisabetta Pietrostefani, 2017. "The Economic Effects of Density: A Synthesis," CESifo Working Paper Series 6744, CESifo.
- Kluve, Jochen & Puerto, Susana & Robalino, David & Romero, Jose M. & Rother, Friederike & Stöterau, Jonathan & Weidenkaff, Felix & Witte, Marc, 2019. "Do youth employment programs improve labor market outcomes? A quantitative review," World Development, Elsevier, vol. 114(C), pages 237-253.
2020
- Abel Brodeur & Nikolai Cook & Anthony Heyes, 2020. "Methods Matter: p-Hacking and Publication Bias in Causal Analysis in Economics," American Economic Review, American Economic Association, vol. 110(11), pages 3634-3660, November.
- Xue, Xindong & Reed, W. Robert & Menclova, Andrea, 2020.
"Social capital and health: a meta-analysis,"
Journal of Health Economics, Elsevier, vol. 72(C).
- Xindong Xue & W. Robert Reed, 2019. "Social Capital and Health: A Meta-Analysis," Working Papers in Economics 19/01, University of Canterbury, Department of Economics and Finance.
- Xindong Xue & W. Robert Reed & Andrea K. Menclova, 2019. "Social Capital and Health: A Meta-Analysis," Working Papers in Economics 19/18, University of Canterbury, Department of Economics and Finance.
- Tomáš Havránek & T. D. Stanley & Hristos Doucouliagos & Pedro Bom & Jerome Geyer‐Klingeberg & Ichiro Iwasaki & W. Robert Reed & Katja Rost & R. C. M. van Aert, 2020. "Reporting Guidelines For Meta‐Analysis In Economics," Journal of Economic Surveys, Wiley Blackwell, vol. 34(3), pages 469-475, July.
- Tomas Havranek & Anna Sokolova, 2020.
"Do Consumers Really Follow a Rule of Thumb? Three Thousand Estimates from 144 Studies Say 'Probably Not',"
Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 35, pages 97-122, January.
- Tomas Havranek & Anna Sokolova, 2019. "Code and data files for "Do Consumers Really Follow a Rule of Thumb? Three Thousand Estimates from 144 Studies Say 'Probably Not'"," Computer Codes 18-255, Review of Economic Dynamics.
- Andrew Y Chen & Tom Zimmermann & Jeffrey Pontiff, 2020. "Publication Bias and the Cross-Section of Stock Returns," Review of Asset Pricing Studies, Oxford University Press, vol. 10(2), pages 249-289.
- Bajzik, Josef & Havranek, Tomas & Irsova, Zuzana & Schwarz, Jiri, 2020. "Estimating the Armington elasticity: The importance of study design and publication bias," Journal of International Economics, Elsevier, vol. 127(C).
- Cristina Blanco-Perez & Abel Brodeur, 2020.
"Publication Bias and Editorial Statement on Negative Findings,"
Economic Journal, Royal Economic Society, vol. 130(629), pages 1226-1247.
- Cristina Blanco-Perez & Abel Brodeur, 2019. "Publication Bias and Editorial Statement on Negative Findings," Working Papers 1907E, University of Ottawa, Department of Economics.
- Blanco-Perez, Cristina & Brodeur, Abel, 2019. "Publication Bias and Editorial Statement on Negative Findings," IZA Discussion Papers 12493, Institute of Labor Economics (IZA).
- Cristina Blanco-Perez & Abel Brodeur, 2019. "Publication Bias and Editorial Statement on Negative Findings," Working Papers 190001, Canadian Centre for Health Economics.
- Brodeur, Abel & Blanco-Perez, Cristina, 2017. "Publication Bias and Editorial Statement on Negative Findings," MetaArXiv xq9nt, Center for Open Science.
2021
- Alexander, L. Brown & Taisuke Imai & Ferdinand M. Vieider & Colin Camerer, 2021. "Meta-Analysis of Empirical Estimates of Loss-Aversion," CESifo Working Paper Series 8848, CESifo.
- Anna Sokolova & Todd Sorensen, 2021.
"Monopsony in Labor Markets: A Meta-Analysis,"
ILR Review, Cornell University, ILR School, vol. 74(1), pages 27-55, January.
- Sokolova, Anna & Sorensen, Todd A., 2018. "Monopsony in Labor Markets: A Meta-Analysis," IZA Discussion Papers 11966, Institute of Labor Economics (IZA).
- Gechert, Sebastian & Havranek, Tomas & Irsova, Zuzana & Kolcunova, Dominika, 2021. "Measuring Capital-Labor Substitution: The Importance of Method Choices and Publication Bias," CEPR Discussion Papers 15687, C.E.P.R. Discussion Papers.