Nothing Special   »   [go: up one dir, main page]

IDEAS home Printed from https://ideas.repec.org/a/eee/joecag/v17y2020ics2212828x20300505.html
   My bibliography  Save this article

The impact of population aging on business cycles volatility: International evidence

Author

Listed:
  • Dantas Guimarães, Silvana
  • Ferreira Tiryaki, Gisele
Abstract
The effects of population aging on short-run macroeconomic performance are theoretically ambiguous. Increased longevity may compromise public budgets’ sustainability due to the growing expenditures with health services and social security. It may also affect labor market dynamics and influence savings’ behavior, leading to lower equilibrium interest rates and more restricted monetary policy interventions’ space. Yet, consumers and entrepreneurs become more risk-averse as life expectancy grows, which may reduce the volatility of consumption and investment. This paper aims at verifying if population aging promotes or hinders macroeconomic stability. Using data from 146 economies between 1996 and 2016, static and dynamic panel data models were estimated controlling for other factors that affect short-run macroeconomic performance. The results indicate that countries with an aging population exhibit lower consumption and investment volatility, but output volatility seems to increase as the population grows older likely due to the labor market responses to aging and greater international trade volatility.

Suggested Citation

  • Dantas Guimarães, Silvana & Ferreira Tiryaki, Gisele, 2020. "The impact of population aging on business cycles volatility: International evidence," The Journal of the Economics of Ageing, Elsevier, vol. 17(C).
  • Handle: RePEc:eee:joecag:v:17:y:2020:i:c:s2212828x20300505
    DOI: 10.1016/j.jeoa.2020.100285
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S2212828X20300505
    Download Restriction: no

    File URL: https://libkey.io/10.1016/j.jeoa.2020.100285?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    References listed on IDEAS

    as
    1. George W. Stadler, 1994. "Real Business Cycles," Journal of Economic Literature, American Economic Association, vol. 32(4), pages 1750-1783, December.
    2. Baxter, Marianne & Farr, Dorsey D., 2005. "Variable capital utilization and international business cycles," Journal of International Economics, Elsevier, vol. 65(2), pages 335-347, March.
    3. Loayza, Norman V. & Ranciere, Romain, 2006. "Financial Development, Financial Fragility, and Growth," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 38(4), pages 1051-1076, June.
    4. Valery Polkovnichenko, 2003. "Human Capital and the Private Equity Premium," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 6(4), pages 831-845, October.
    5. Chinn, Menzie D. & Prasad, Eswar S., 2003. "Medium-term determinants of current accounts in industrial and developing countries: an empirical exploration," Journal of International Economics, Elsevier, vol. 59(1), pages 47-76, January.
    6. Thomas Dohmen & Armin Falk & Bart H. H. Golsteyn & David Huffman & Uwe Sunde, 2017. "Risk Attitudes Across The Life Course," Economic Journal, Royal Economic Society, vol. 127(605), pages 95-116, October.
    7. Nir Jaimovich & Henry E. Siu, 2009. "The Young, the Old, and the Restless: Demographics and Business Cycle Volatility," American Economic Review, American Economic Association, vol. 99(3), pages 804-826, June.
    8. Karras, Georgios & Song, Frank, 1996. "Sources of business-cycle volatility: An exploratory study on a sample of OECD countries," Journal of Macroeconomics, Elsevier, vol. 18(4), pages 621-637.
    9. Yoon, Jong-Won & Kim, Jinill & Lee, Jungjin, 2018. "Impact of Demographic Changes on Inflation and the Macroeconomy," KDI Journal of Economic Policy, Korea Development Institute (KDI), vol. 40(1), pages 1-30.
    10. Arellano, Manuel & Bover, Olympia, 1995. "Another look at the instrumental variable estimation of error-components models," Journal of Econometrics, Elsevier, vol. 68(1), pages 29-51, July.
    11. David Roodman, 2009. "How to do xtabond2: An introduction to difference and system GMM in Stata," Stata Journal, StataCorp LP, vol. 9(1), pages 86-136, March.
    12. James Liang & Hui Wang & Edward P. Lazear, 2018. "Demographics and Entrepreneurship," Journal of Political Economy, University of Chicago Press, vol. 126(S1), pages 140-196.
    13. Cihak, Martin & Demirguc-Kunt, Asli & Feyen, Erik & Levine, Ross, 2013. "Financial Development in 205 Economies, 1960 to 2010," Journal of Financial Perspectives, EY Global FS Institute, vol. 1(2), pages 17-36.
    14. Denizer Cevdet A. & Iyigun Murat F. & Owen Ann, 2002. "Finance and Macroeconomic Volatility," The B.E. Journal of Macroeconomics, De Gruyter, vol. 2(1), pages 1-32, October.
    15. Robert G. King & Ross Levine, 1993. "Finance and Growth: Schumpeter Might Be Right," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 108(3), pages 717-737.
    16. Ramey, Garey & Ramey, Valerie A, 1995. "Cross-Country Evidence on the Link between Volatility and Growth," American Economic Review, American Economic Association, vol. 85(5), pages 1138-1151, December.
    17. Bonsang, Eric & Dohmen, Thomas, 2015. "Risk attitude and cognitive aging," Journal of Economic Behavior & Organization, Elsevier, vol. 112(C), pages 112-126.
    18. Eswar S. Prasad & Kenneth Rogoff & Shang-Jin Wei & M. Ayhan Kose, 2007. "Financial Globalization, Growth and Volatility in Developing Countries," NBER Chapters, in: Globalization and Poverty, pages 457-516, National Bureau of Economic Research, Inc.
    19. Carvalho, Carlos & Ferrero, Andrea & Nechio, Fernanda, 2016. "Demographics and real interest rates: Inspecting the mechanism," European Economic Review, Elsevier, vol. 88(C), pages 208-226.
    20. Mihir A. Desai & C. Fritz Foley & Kristin J. Forbes, 2008. "Financial Constraints and Growth: Multinational and Local Firm Responses to Currency Depreciations," The Review of Financial Studies, Society for Financial Studies, vol. 21(6), pages 2857-2888, November.
    21. Alcala, Francisco & Sancho, Israel, 2004. "Output composition and the US output volatility decline," Economics Letters, Elsevier, vol. 82(1), pages 115-120, January.
    22. Ferreira da Silva, Gisele, 2002. "The impact of financial system development on business cycles volatility: cross-country evidence," Journal of Macroeconomics, Elsevier, vol. 24(2), pages 233-253, June.
    23. Fujiwara, Ippei & Teranishi, Yuki, 2008. "A dynamic new Keynesian life-cycle model: Societal aging, demographics, and monetary policy," Journal of Economic Dynamics and Control, Elsevier, vol. 32(8), pages 2398-2427, August.
    24. Yunus Aksoy & Henrique S. Basso & Ron P. Smith & Tobias Grasl, 2019. "Demographic Structure and Macroeconomic Trends," American Economic Journal: Macroeconomics, American Economic Association, vol. 11(1), pages 193-222, January.
    25. Bejan, Maria, 2006. "Trade Openness and Output Volatility," MPRA Paper 2759, University Library of Munich, Germany.
    26. Laibson, David I. & Agarwal, Sumit & Driscoll, John C. & Gabaix, Xavier, 2009. "The Age of Reason: Financial Decisions over the Life-Cycle with Implications for Regulation," Scholarly Articles 4554335, Harvard University Department of Economics.
    27. Fatas, Antonio & Mihov, Ilian, 2001. "Government size and automatic stabilizers: international and intranational evidence," Journal of International Economics, Elsevier, vol. 55(1), pages 3-28, October.
    28. Ana Fostel & John Geanakoplos & Gregory Phelan, 2019. "Global Collateral and Capital Flows," NBER Working Papers 25583, National Bureau of Economic Research, Inc.
    29. Sunde, Uwe & Dohmen, Thomas, 2016. "Aging and preferences," The Journal of the Economics of Ageing, Elsevier, vol. 7(C), pages 64-68.
    30. Hong, Harrison & Scheinkman, José & Xiong, Wei, 2008. "Advisors and asset prices: A model of the origins of bubbles," Journal of Financial Economics, Elsevier, vol. 89(2), pages 268-287, August.
    31. Blundell, Richard & Bond, Stephen, 1998. "Initial conditions and moment restrictions in dynamic panel data models," Journal of Econometrics, Elsevier, vol. 87(1), pages 115-143, August.
    32. Beck, Nathaniel & Katz, Jonathan N., 1995. "What To Do (and Not to Do) with Time-Series Cross-Section Data," American Political Science Review, Cambridge University Press, vol. 89(3), pages 634-647, September.
    33. Eric M. Leeper & Todd B. Walker, 2011. "Fiscal Limits in Advanced Economies," Economic Papers, The Economic Society of Australia, vol. 30(1), pages 33-47, March.
    34. Alda, Mercedes, 2017. "The relationship between pension funds and the stock market: Does the aging population of Europe affect it?," International Review of Financial Analysis, Elsevier, vol. 49(C), pages 83-97.
    35. Sudo, Nao & Takizuka, Yasutaka, 2020. "Population Aging And The Real Interest Rate In The Last And Next 50 Years: A Tale Told By An Overlapping Generations Model," Macroeconomic Dynamics, Cambridge University Press, vol. 24(8), pages 2060-2103, December.
    36. Patrick A. Imam, 2015. "Shock from Graying: Is the Demographic Shift Weakening Monetary Policy Effectiveness," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 20(2), pages 138-154, March.
    37. Callum Jones, 2023. "Aging, Secular Stagnation, and the Business Cycle," The Review of Economics and Statistics, MIT Press, vol. 105(6), pages 1580-1595, November.
    38. Sumit Agarwal & John C. Driscoll & Xavier Gabaix & David Laibson, 2009. "The Age of Reason: Financial Decisions over the Life Cycle and Implications for Regulation," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 40(2 (Fall)), pages 51-117.
    39. DeAngelo, Harry & Stulz, René M., 2015. "Liquid-claim production, risk management, and bank capital structure: Why high leverage is optimal for banks," Journal of Financial Economics, Elsevier, vol. 116(2), pages 219-236.
    40. Heer, Burkhard & Rohrbacher, Stefan & Scharrer, Christian, 2017. "Aging, The Great Moderation, And Business-Cycle Volatility In A Life-Cycle Model," Macroeconomic Dynamics, Cambridge University Press, vol. 21(2), pages 362-383, March.
    41. FUJITA Shigeru & FUJIWARA Ippei, 2015. "Declining Trends in the Real Interest Rate and Inflation: Role of aging," Discussion papers 15140, Research Institute of Economy, Trade and Industry (RIETI).
    42. Lawrence J. Christiano & Terry J. Fitzgerald, 2003. "The Band Pass Filter," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 44(2), pages 435-465, May.
    43. Julian di Giovanni & Andrei A. Levchenko, 2009. "Trade Openness and Volatility," The Review of Economics and Statistics, MIT Press, vol. 91(3), pages 558-585, August.
    44. Cai, Jie & Stoyanov, Andrey, 2016. "Population aging and comparative advantage," Journal of International Economics, Elsevier, vol. 102(C), pages 1-21.
    45. Paul Gomme & Richard Rogerson & Peter Rupert & Randall Wright, 2005. "The Business Cycle and the Life Cycle," NBER Chapters, in: NBER Macroeconomics Annual 2004, Volume 19, pages 415-592, National Bureau of Economic Research, Inc.
    46. Christopher Carroll & Jiri Slacalek & Kiichi Tokuoka & Matthew N. White, 2017. "The distribution of wealth and the marginal propensity to consume," Quantitative Economics, Econometric Society, vol. 8(3), pages 977-1020, November.
    47. Henrique S. Basso & Omar Rachedi, 2021. "The Young, the Old, and the Government: Demographics and Fiscal Multipliers," American Economic Journal: Macroeconomics, American Economic Association, vol. 13(4), pages 110-141, October.
    48. Gauti B. Eggertsson & Manuel Lancastre & Lawrence H. Summers, 2019. "Aging, Output Per Capita, and Secular Stagnation," American Economic Review: Insights, American Economic Association, vol. 1(3), pages 325-342, December.
    49. Christina D. Romer & David H. Romer, 2017. "Why Some Times Are Different: Macroeconomic Policy and the Aftermath of Financial Crises," NBER Working Papers 23931, National Bureau of Economic Research, Inc.
    50. Bates, Timothy, 1990. "Entrepreneur Human Capital Inputs and Small Business Longevity," The Review of Economics and Statistics, MIT Press, vol. 72(4), pages 551-559, November.
    51. Yoshino, Naoyuki & Miyamoto, Hiroaki, 2017. "Declined effectiveness of fiscal and monetary policies faced with aging population in Japan," Japan and the World Economy, Elsevier, vol. 42(C), pages 32-44.
    52. Mr. Shekhar Aiyar & Mr. Christian H Ebeke, 2016. "The Impact of Workforce Aging on European Productivity," IMF Working Papers 2016/238, International Monetary Fund.
    53. Bluedorn, Allen C. & Martin, Gwen, 2008. "The time frames of entrepreneurs," Journal of Business Venturing, Elsevier, vol. 23(1), pages 1-20, January.
    54. Daniel Hoechle, 2007. "Robust standard errors for panel regressions with cross-sectional dependence," Stata Journal, StataCorp LP, vol. 7(3), pages 281-312, September.
    55. James Feyrer, 2007. "Demographics and Productivity," The Review of Economics and Statistics, MIT Press, vol. 89(1), pages 100-109, February.
    56. Backus, David K & Kehoe, Patrick J & Kydland, Finn E, 1992. "International Real Business Cycles," Journal of Political Economy, University of Chicago Press, vol. 100(4), pages 745-775, August.
    57. Arlene Wong, 2016. "Population aging and the transmission of monetary policy to consumption," 2016 Meeting Papers 716, Society for Economic Dynamics.
    58. Margarida Duarte & Diego Restuccia & Andrea L. Waddle, 2007. "Exchange rates and business cycles across countries," Economic Quarterly, Federal Reserve Bank of Richmond, vol. 93(Win), pages 57-76.
    59. Gumus, Inci & Taşpınar, Zeren Tatar, 2015. "Real exchange rate volatility and business cycles in emerging market economies," Economics Letters, Elsevier, vol. 134(C), pages 127-129.
    60. James D. Hamilton, 2018. "Why You Should Never Use the Hodrick-Prescott Filter," The Review of Economics and Statistics, MIT Press, vol. 100(5), pages 831-843, December.
    61. Thomas Dohmen & Armin Falk & Bart H. H. Golsteyn & David Huffman & Uwe Sunde, 2017. "Risk Attitudes Across The Life Course," Economic Journal, Royal Economic Society, vol. 127(605), pages 95-116, October.
    62. Charles R. Bean, 2004. "Global demographic change : some implications for central banks : overview panel," Proceedings - Economic Policy Symposium - Jackson Hole, Federal Reserve Bank of Kansas City, issue Aug, pages 447-454.
    63. Mr. Derek Anderson & Mr. Dennis P Botman & Mr. Benjamin L Hunt, 2014. "Is Japan’s Population Aging Deflationary?," IMF Working Papers 2014/139, International Monetary Fund.
    64. Christina D. Romer, 1999. "Changes in Business Cycles: Evidence and Explanations," Journal of Economic Perspectives, American Economic Association, vol. 13(2), pages 23-44, Spring.
    65. Alessio Moro, 2015. "Structural Change, Growth, and Volatility," American Economic Journal: Macroeconomics, American Economic Association, vol. 7(3), pages 259-294, July.
    66. Mr. Luis M. Cubeddu & Signe Krogstrup & Gustavo Adler & Mr. Pau Rabanal & Mai Dao & Mrs. Swarnali A Hannan & Luciana Juvenal & Ms. Carolina Osorio-Buitron & Cyril Rebillard & Mr. Daniel Garcia-Macia &, 2019. "The External Balance Assessment Methodology: 2018 Update," IMF Working Papers 2019/065, International Monetary Fund.
    67. Bo Becker & Jinzhu Chen & David Greenberg, 2013. "Financial Development, Fixed Costs, and International Trade," The Review of Corporate Finance Studies, Society for Financial Studies, vol. 2(1), pages 1-28.
    68. Levesque, Moren & Minniti, Maria, 2006. "The effect of aging on entrepreneurial behavior," Journal of Business Venturing, Elsevier, vol. 21(2), pages 177-194, March.
    69. Blackburn, Keith & Cipriani, Giam Pietro, 2002. "A model of longevity, fertility and growth," Journal of Economic Dynamics and Control, Elsevier, vol. 26(2), pages 187-204, February.
    70. James Banks & Richard Blundell & Peter Levell & James P. Smith, 2019. "Life-Cycle Consumption Patterns at Older Ages in the United States and the United Kingdom: Can Medical Expenditures Explain the Difference?," American Economic Journal: Economic Policy, American Economic Association, vol. 11(3), pages 27-54, August.
    71. Alan J. Auerbach, 2012. "Societal Aging: Implications for Fiscal Policy," IMES Discussion Paper Series 12-E-12, Institute for Monetary and Economic Studies, Bank of Japan.
    72. Bakshi, Gurdip S & Chen, Zhiwu, 1994. "Baby Boom, Population Aging, and Capital Markets," The Journal of Business, University of Chicago Press, vol. 67(2), pages 165-202, April.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Xu, Da & Shang, Yunfeng & Yang, Qin & Chen, Hui, 2023. "Population aging and eco-tourism efficiency: Ways to promote green recovery," Economic Analysis and Policy, Elsevier, vol. 79(C), pages 1-9.
    2. João Leitão & João Capucho, 2021. "Institutional, Economic, and Socio-Economic Determinants of the Entrepreneurial Activity of Nations," Administrative Sciences, MDPI, vol. 11(1), pages 1-32, March.
    3. Karel Brůna & Jiří Pour, 2023. "Population aging and structural over/underinvestment," Economic Change and Restructuring, Springer, vol. 56(4), pages 2339-2383, August.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Markus Eller & Jarko Fidrmuc & Zuzana Fungáčová, 2016. "Fiscal Policy and Regional Output Volatility: Evidence from Russia," Regional Studies, Taylor & Francis Journals, vol. 50(11), pages 1849-1862, November.
    2. Dániel Baksa & Zsuzsa Munkácsi, 2019. "More Gray, More Volatile? Aging and (Optimal) Monetary Policy," Bank of Lithuania Working Paper Series 67, Bank of Lithuania.
    3. Klomp, Jeroen & de Haan, Jakob, 2009. "Political institutions and economic volatility," European Journal of Political Economy, Elsevier, vol. 25(3), pages 311-326, September.
    4. repec:zbw:bofitp:2013_013 is not listed on IDEAS
    5. Markus Eller & Jarko Fidrmuc & Zuzana Fungáčová, 2016. "Fiscal Policy and Regional Output Volatility: Evidence from Russia," Regional Studies, Taylor & Francis Journals, vol. 50(11), pages 1849-1862, November.
    6. Juselius, Mikael & Takáts, Előd, 2021. "Inflation and demography through time," Journal of Economic Dynamics and Control, Elsevier, vol. 128(C).
    7. Mario Holzner & Stefan Jestl & David Pichler, 2022. "Public and private pension systems and macroeconomic volatility in OECD countries," Scottish Journal of Political Economy, Scottish Economic Society, vol. 69(2), pages 131-168, May.
    8. Piyapas Tharavanij, 2007. "Capital Market And Business Cycle Volatility," Monash Economics Working Papers 33-07, Monash University, Department of Economics.
    9. Alessandro Federici & Pierluigi Montalbano, 2012. "Macroeconomic volatility, consumption behaviour and welfare: A cross-country analysis," Working Paper Series 3612, Department of Economics, University of Sussex Business School.
    10. Spiliopoulos, Leonidas, 2010. "The determinants of macroeconomic volatility: A Bayesian model averaging approach," MPRA Paper 26832, University Library of Munich, Germany.
    11. Sana Hussain, 2020. "Good volatility vs. bad volatility: The asymmetric impact of financial depth on macroeconomic volatility," Manchester School, University of Manchester, vol. 88(3), pages 405-438, June.
    12. Xue, Wen-Jun, 2020. "Financial sector development and growth volatility: An international study," International Review of Economics & Finance, Elsevier, vol. 70(C), pages 67-88.
    13. Huang, Ho-Chuan (River) & Fang, WenShwo & Miller, Stephen M., 2014. "Does financial development volatility affect industrial growth volatility?," International Review of Economics & Finance, Elsevier, vol. 29(C), pages 307-320.
    14. Papapetrou, Evangelia & Tsalaporta, Pinelopi, 2020. "The impact of population aging in rich countries: What’s the future?," Journal of Policy Modeling, Elsevier, vol. 42(1), pages 77-95.
    15. Davide fiaschi & Lisa Gianmoena & Angela Parenti, 2013. "The Determinants of Growth Rate Volatility in European Regions," Discussion Papers 2013/170, Dipartimento di Economia e Management (DEM), University of Pisa, Pisa, Italy.
    16. Feng Wei & Yu Kong, 2016. "Financial Development, Financial Structure, and Macroeconomic Volatility: Evidence from China," Sustainability, MDPI, vol. 8(11), pages 1-20, November.
    17. Basso, Henrique S. & Jimeno, Juan F., 2021. "From secular stagnation to robocalypse? Implications of demographic and technological changes," Journal of Monetary Economics, Elsevier, vol. 117(C), pages 833-847.
    18. Samargandi, Nahla & Fidrmuc, Jan & Ghosh, Sugata, 2015. "Is the Relationship Between Financial Development and Economic Growth Monotonic? Evidence from a Sample of Middle-Income Countries," World Development, Elsevier, vol. 68(C), pages 66-81.
    19. Robert Stewart & Murshed Chowdhury & Vaalmikki Arjoon, 2021. "Bank stability and economic growth: trade-offs or opportunities?," Empirical Economics, Springer, vol. 61(2), pages 827-853, August.
    20. Sylviane Guillaumont Jeanneney & Kangni Kpodar, 2006. "Développement financier, instabilité financière et croissance économique," Economie & Prévision, La Documentation Française, vol. 0(3), pages 87-111.
    21. Donou-Adonsou, Ficawoyi & Sylwester, Kevin, 2017. "Growth effect of banks and microfinance: Evidence from developing countries," The Quarterly Review of Economics and Finance, Elsevier, vol. 64(C), pages 44-56.

    More about this item

    Keywords

    Business cycles; Population aging; Demographics;
    All these keywords.

    JEL classification:

    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
    • J11 - Labor and Demographic Economics - - Demographic Economics - - - Demographic Trends, Macroeconomic Effects, and Forecasts
    • J14 - Labor and Demographic Economics - - Demographic Economics - - - Economics of the Elderly; Economics of the Handicapped; Non-Labor Market Discrimination

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:joecag:v:17:y:2020:i:c:s2212828x20300505. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: https://www.journals.elsevier.com/the-journal-of-the-economics-of-ageing .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.