IDEAS home Printed from https://ideas.repec.org/p/imf/imfwpa/2012-026.html
   My bibliography  Save this paper

Mortgage Defaults

Author

Listed:
  • Mr. Leonardo Martinez
  • Juan Carlos Hatchondo
  • Mr. Juan M. Sanchez

Abstract

This paper incorporates house price risk and mortgages into a standard incomplete market (SIM) model. The model is calibrated to match U.S. data and accounts for non-targeted features of the data such as the distribution of down payments, the life-cycle profile of home ownership, and the mortgage default rate. The average coefficients that measure the agents' ability to self-insure against income shocks are similar to those of a SIM model without housing but housing increases the values of these coefficients for younger agents. The response of consumption to house price shocks is minimal. The introduction of minimum down payments or income garnishment benefits a majority of the population.

Suggested Citation

  • Mr. Leonardo Martinez & Juan Carlos Hatchondo & Mr. Juan M. Sanchez, 2012. "Mortgage Defaults," IMF Working Papers 2012/026, International Monetary Fund.
    • Handle: RePEc:imf:imfwpa:2012/026
    as

    Download full text from publisher

    File URL: http://www.imf.org/external/pubs/cat/longres.aspx?sk=25670
    Download Restriction: no
    ---><---

    Other versions of this item:

    • Juan Carlos Hatchondo & Leonardo Martinez & Juan M. Sanchez, 2011. "Mortgage defaults," Working Papers 2011-019, Federal Reserve Bank of St. Louis.
    • Juan Carlos Hatchondo & Leonardo Martinez & Juan M. Sanchez, 2011. "Mortgage defaults," Working Paper 11-05, Federal Reserve Bank of Richmond.
    • Juan Carlos Hatchondo & Leonardo Martinez & Juan M. Sanchez, 2015. "Mortgage Defaults," CAEPR Working Papers 2015-011, Center for Applied Economics and Policy Research, Department of Economics, Indiana University Bloomington.

    References listed on IDEAS

    as
    1. Christopher D. Carroll & Misuzu Otsuka & Jiri Slacalek, 2011. "How Large Are Housing and Financial Wealth Effects? A New Approach," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 43(1), pages 55-79, February.
    2. Juan Carlos Hatchondo & Leonardo Martinez & Horacio Sapriza, 2010. "Quantitative properties of sovereign default models: solution methods," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 13(4), pages 919-933, October.
    3. Igor Livshits & James MacGee & Michèle Tertilt, 2010. "Accounting for the Rise in Consumer Bankruptcies," American Economic Journal: Macroeconomics, American Economic Association, vol. 2(2), pages 165-193, April.
    4. Mark Aguiar & Mark Bils, 2015. "Has Consumption Inequality Mirrored Income Inequality?," American Economic Review, American Economic Association, vol. 105(9), pages 2725-2756, September.
    5. Stefano Corradin & José L. Fillat & Carles Vergara-Alert, 2014. "Optimal Portfolio Choice with Predictability in House Prices and Transaction Costs," The Review of Financial Studies, Society for Financial Studies, vol. 27(3), pages 823-880.
    6. John Y. Campbell & João F. Cocco, 2003. "Household Risk Management and Optimal Mortgage Choice," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 118(4), pages 1449-1494.
    7. Kurt Mitman, 2016. "Macroeconomic Effects of Bankruptcy and Foreclosure Policies," American Economic Review, American Economic Association, vol. 106(8), pages 2219-2255, August.
    8. Krueger, Dirk & Jeske, Karsten & Mitman, Kurt, 2011. "Housing and the Macroeconomy: The Role of Bailout Guarantees for Government Sponsored Enterprises," CEPR Discussion Papers 8624, C.E.P.R. Discussion Papers.
    9. Li, Wenli & Sarte, Pierre-Daniel, 2006. "U.S. consumer bankruptcy choice: The importance of general equilibrium effects," Journal of Monetary Economics, Elsevier, vol. 53(3), pages 613-631, April.
    10. Todd Sinai & Nicholas S. Souleles, 2005. "Owner-Occupied Housing as a Hedge Against Rent Risk," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 120(2), pages 763-789.
    11. Bulent Guler, 2015. "Innovations in Information Technology and the Mortgage Market," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 18(3), pages 456-483, July.
    12. Matthew Chambers & Carlos Garriga & Don E. Schlagenhauf, 2009. "Accounting For Changes In The Homeownership Rate," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 50(3), pages 677-726, August.
    13. Igor Livshits & James MacGee & Michèle Tertilt, 2007. "Consumer Bankruptcy: A Fresh Start," American Economic Review, American Economic Association, vol. 97(1), pages 402-418, March.
    14. John Y. Campbell, 2013. "Mortgage Market Design," Review of Finance, European Finance Association, vol. 17(1), pages 1-33.
    15. Narayana Kocherlakota & Luigi Pistaferri, 2009. "Asset Pricing Implications of Pareto Optimality with Private Information," Journal of Political Economy, University of Chicago Press, vol. 117(3), pages 555-590, June.
    16. Satyajit Chatterjee & Burcu Eyigungor, 2015. "A Quantitative Analysis of the US Housing and Mortgage Markets and the Foreclosure Crisis," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 18(2), pages 165-184, April.
    17. Storesletten, Kjetil & Telmer, Christopher I. & Yaron, Amir, 2004. "Consumption and risk sharing over the life cycle," Journal of Monetary Economics, Elsevier, vol. 51(3), pages 609-633, April.
    18. Wenli Li & Haiyong Liu & Fang Yang & Rui Yao, 2016. "Housing Over Time And Over The Life Cycle: A Structural Estimation," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 57(4), pages 1237-1260, November.
    19. Joseph W. Gruber & Robert F. Martin, 2003. "Precautionary savings and the wealth distribution with illiquid durables," International Finance Discussion Papers 773, Board of Governors of the Federal Reserve System (U.S.).
    20. John Y. Campbell & João F. Cocco, 2015. "A Model of Mortgage Default," Journal of Finance, American Finance Association, vol. 70(4), pages 1495-1554, August.
    21. Blundell,Richard & Newey,Whitney K. & Persson,Torsten (ed.), 2006. "Advances in Economics and Econometrics," Cambridge Books, Cambridge University Press, number 9780521871525.
    22. Bolton, Patrick & Jeanne, Olivier, 2005. "Structuring and Restructuring Sovereign Debt: The Role of Seniority," CEPR Discussion Papers 4901, C.E.P.R. Discussion Papers.
    23. Athreya, Kartik, 2006. "Fresh start or head start? Uniform bankruptcy exemptions and welfare," Journal of Economic Dynamics and Control, Elsevier, vol. 30(11), pages 2051-2079, November.
    24. Yongheng Deng & John M. Quigley & Robert Van Order, 2000. "Mortgage Terminations, Heterogeneity and the Exercise of Mortgage Options," Econometrica, Econometric Society, vol. 68(2), pages 275-308, March.
    25. Satyajit Chatterjee & Dean Corbae & Makoto Nakajima & José-Víctor Ríos-Rull, 2007. "A Quantitative Theory of Unsecured Consumer Credit with Risk of Default," Econometrica, Econometric Society, vol. 75(6), pages 1525-1589, November.
    26. Anthony Pennington-Cross, 2006. "The Value of Foreclosed Property," Journal of Real Estate Research, American Real Estate Society, vol. 28(2), pages 193-214.
    27. Terry, Stephen J. & Knotek II, Edward S., 2011. "Markov-chain approximations of vector autoregressions: Application of general multivariate-normal integration techniques," Economics Letters, Elsevier, vol. 110(1), pages 4-6, January.
    28. Jonathan Eaton & Mark Gersovitz, 1981. "Debt with Potential Repudiation: Theoretical and Empirical Analysis," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 48(2), pages 289-309.
    29. Huggett, Mark, 1996. "Wealth distribution in life-cycle economies," Journal of Monetary Economics, Elsevier, vol. 38(3), pages 469-494, December.
    30. Chatterjee, Satyajit & Gordon, Grey, 2012. "Dealing with consumer default: Bankruptcy vs garnishment," Journal of Monetary Economics, Elsevier, vol. 59(S), pages 1-16.
    31. Christopher Mayer & Karen Pence & Shane M. Sherlund, 2009. "The Rise in Mortgage Defaults," Journal of Economic Perspectives, American Economic Association, vol. 23(1), pages 27-50, Winter.
    32. Fang Yang & Wenli Li & Haiyong Liu & Rui Yao, 2014. "Housing over Time and over the Life Cycle: A Structural Estimation," Departmental Working Papers 2014-12, Department of Economics, Louisiana State University.
    33. Eric Wong & Tom Fong & Ka-fai Li & Henry Choi, 2011. "Loan-to-Value Ratio as a Macro-Prudential Tool - Hong Kong's Experience and Cross-Country Evidence," Working Papers 1101, Hong Kong Monetary Authority.
    34. Richard Blundell & Luigi Pistaferri & Ian Preston, 2008. "Consumption Inequality and Partial Insurance," American Economic Review, American Economic Association, vol. 98(5), pages 1887-1921, December.
    35. Greg Kaplan & Giovanni L. Violante, 2010. "How Much Consumption Insurance beyond Self-Insurance?," American Economic Journal: Macroeconomics, American Economic Association, vol. 2(4), pages 53-87, October.
    36. Daphne Chen & Jake Zhao, 2017. "The Impact of Personal Bankruptcy on Labor Supply Decisions," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 26, pages 40-61, October.
    37. Dirk Krueger & Fabrizio Perri, 2006. "Does Income Inequality Lead to Consumption Inequality? Evidence and Theory -super-1," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 73(1), pages 163-193.
    38. Foote, Christopher L. & Gerardi, Kristopher & Willen, Paul S., 2008. "Negative equity and foreclosure: Theory and evidence," Journal of Urban Economics, Elsevier, vol. 64(2), pages 234-245, September.
    39. Erwan Quintin, 2012. "More punishment, less default?," Annals of Finance, Springer, vol. 8(4), pages 427-454, November.
    40. Borys Grochulski, 2010. "Optimal Personal Bankruptcy Design under Moral Hazard," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 13(2), pages 350-378, April.
    41. Hanushek, Eric A & Quigley, John M, 1980. "What Is the Price Elasticity of Housing Demand?," The Review of Economics and Statistics, MIT Press, vol. 62(3), pages 449-454, August.
    42. Song Han & Wenli Li, 2007. "Fresh Start or Head Start? The Effects of Filing for Personal Bankruptcy on Work Effort," Journal of Financial Services Research, Springer;Western Finance Association, vol. 31(2), pages 123-152, June.
    43. Patrick Bajari & Chenghuan Sean Chu & Minjung Park, 2008. "An Empirical Model of Subprime Mortgage Default From 2000 to 2007," NBER Working Papers 14625, National Bureau of Economic Research, Inc.
    44. Terrence M. Clauretie, 1987. "The Impact of Interstate Foreclosure Cost Differences and the Value of Mortgages on Default Rates," Real Estate Economics, American Real Estate and Urban Economics Association, vol. 15(3), pages 152-167, September.
    45. Blundell,Richard & Newey,Whitney K. & Persson,Torsten (ed.), 2006. "Advances in Economics and Econometrics," Cambridge Books, Cambridge University Press, number 9780521692083.
    46. Mr. Leonardo Martinez & Horacio Sapriza & Juan Carlos Hatchondo, 2010. "Quantitative properties of sovereign default models: solution methods matter," IMF Working Papers 2010/100, International Monetary Fund.
    47. Juan C. Conesa & Dirk Krueger, 1999. "Social Security Reform with Heterogeneous Agents," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 2(4), pages 757-795, October.
    48. Andra C. Ghent & Marianna Kudlyak, 2011. "Recourse and Residential Mortgage Default: Evidence from US States 1," The Review of Financial Studies, Society for Financial Studies, vol. 24(9), pages 3139-3186.
    49. Kartik B. Athreya & Xuan S. Tam & Eric Young, 2009. "Are harsh penalties for default really better?," Working Paper 09-11, Federal Reserve Bank of Richmond.
    50. Satyajit Chatterjee & Burcu Eyigungor, 2009. "Foreclosures and house price dynamics: a quantitative analysis of the mortgage crisis and the foreclosure prevention policy," Working Papers 09-22, Federal Reserve Bank of Philadelphia.
    51. Dean Corbae & Erwan Quintin, 2015. "Leverage and the Foreclosure Crisis," Journal of Political Economy, University of Chicago Press, vol. 123(1), pages 1-65.
    52. Bryan J. Noeth & Rajdeep Sengupta, 2011. "Have the trends in housing bottomed out?," The Regional Economist, Federal Reserve Bank of St. Louis, issue Jan, pages 20-22.
    53. Jeske, Karsten & Krueger, Dirk & Mitman, Kurt, 2013. "Housing, mortgage bailout guarantees and the macro economy," Journal of Monetary Economics, Elsevier, vol. 60(8), pages 917-935.
    54. Athreya, Kartik B., 2008. "Default, insurance, and debt over the life-cycle," Journal of Monetary Economics, Elsevier, vol. 55(4), pages 752-774, May.
    55. Juan Carlos Hatchondo & Leonardo Martinez & Juan M. Sanchez, 2013. "Europe may provide lessons on preventing mortgage defaults," The Regional Economist, Federal Reserve Bank of St. Louis, issue July.
    56. Athreya, Kartik B., 2002. "Welfare implications of the Bankruptcy Reform Act of 1999," Journal of Monetary Economics, Elsevier, vol. 49(8), pages 1567-1595, November.
    57. Huggett, Mark, 1993. "The risk-free rate in heterogeneous-agent incomplete-insurance economies," Journal of Economic Dynamics and Control, Elsevier, vol. 17(5-6), pages 953-969.
    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. Kyle Herkenhoff & Lee Ohanian, 2019. "The Impact of Foreclosure Delay on U.S. Employment," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 31, pages 63-83, January.
    2. Juan Carlos Hatchondo & Leonardo Martinez & Juan M. Sanchez, 2013. "Life cycle patterns and boom-bust dynamics in U.S. housing prices," Economic Synopses, Federal Reserve Bank of St. Louis.
    3. Hanming Fang & You Suk Kim & Wenli Li, 2015. "The Dynamics of Adjustable-Rate Subprime Mortgage Default: A Structural Estimation," Finance and Economics Discussion Series 2015-114, Board of Governors of the Federal Reserve System (U.S.).
    4. Pedro Gete & Franco Zecchetto, 2018. "Distributional Implications of Government Guarantees in Mortgage Markets," The Review of Financial Studies, Society for Financial Studies, vol. 31(3), pages 1064-1097.
    5. Hanming Fang & You Suk Kim & Wenli Li, 2016. "The dynamics of subprime adjustable-rate mortgage default: a structural estimation," Working Papers 16-2, Federal Reserve Bank of Philadelphia.
    6. Hedlund, Aaron, 2016. "Illiquidity and its discontents: Trading delays and foreclosures in the housing market," Journal of Monetary Economics, Elsevier, vol. 83(C), pages 1-13.
    7. Dean Corbae & Erwan Quintin, 2015. "Leverage and the Foreclosure Crisis," Journal of Political Economy, University of Chicago Press, vol. 123(1), pages 1-65.
    8. Kartik Athreya & Juan M. Sánchez & Xuan S. Tam & Eric R. Young, 2018. "Bankruptcy And Delinquency In A Model Of Unsecured Debt," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 59(2), pages 593-623, May.
    9. Juan Carlos Hatchondo & Mr. Leonardo Martinez & Cesar Sosa Padilla, 2020. "Sovereign Debt Standstills," IMF Working Papers 2020/290, International Monetary Fund.
    10. Kristopher Gerardi & Kyle F. Herkenhoff & Lee E. Ohanian & Paul S. Willen, 2018. "Can’t Pay or Won’t Pay? Unemployment, Negative Equity, and Strategic Default," The Review of Financial Studies, Society for Financial Studies, vol. 31(3), pages 1098-1131.
    11. Kyle F. Herkenhoff & Lee E. Ohanian, 2012. "Foreclosure delay and U.S. unemployment," Working Papers 2012-017, Federal Reserve Bank of St. Louis.
    12. Leonardo Martinez & Juan Hatchondo, 2017. "Credit Risk without Commitment," 2017 Meeting Papers 1326, Society for Economic Dynamics.
    13. Eva De Francisco, 2019. "Housing Choices and Their Implications for Consumption Heterogeneity," International Finance Discussion Papers 1249, Board of Governors of the Federal Reserve System (U.S.).
    14. Kyle Herkenhoff & Lee Ohanian, 2019. "The Impact of Foreclosure Delay on U.S. Employment," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 31, pages 63-83, January.
    15. Davis, Morris A. & Van Nieuwerburgh, Stijn, 2015. "Housing, Finance, and the Macroeconomy," Handbook of Regional and Urban Economics, in: Gilles Duranton & J. V. Henderson & William C. Strange (ed.), Handbook of Regional and Urban Economics, edition 1, volume 5, chapter 0, pages 753-811, Elsevier.
    16. Kyle F. Herkenhoff, 2012. "Informal unemployment insurance and labor market dynamics," Working Papers 2012-057, Federal Reserve Bank of St. Louis.
    17. Rhee, Keeyoung, 2018. "The Effects of Non-Recourse Mortgages on Default Risks and Households' Surplus," KDI Journal of Economic Policy, Korea Development Institute (KDI), vol. 40(3), pages 69-89.

    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. Davis, Morris A. & Van Nieuwerburgh, Stijn, 2015. "Housing, Finance, and the Macroeconomy," Handbook of Regional and Urban Economics, in: Gilles Duranton & J. V. Henderson & William C. Strange (ed.), Handbook of Regional and Urban Economics, edition 1, volume 5, chapter 0, pages 753-811, Elsevier.
    2. Kim, Jiseob & Wang, Yicheng, 2018. "Macroeconomic and distributional effects of mortgage guarantee programs for the poor," Journal of Economic Dynamics and Control, Elsevier, vol. 87(C), pages 124-151.
    3. Kim, Jiseob, 2015. "Household’s optimal mortgage and unsecured loan default decision," Journal of Macroeconomics, Elsevier, vol. 45(C), pages 222-244.
    4. Steven Laufer, 2018. "Equity Extraction and Mortgage Default," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 28, pages 1-33, April.
    5. Bulent Guler, 2015. "Innovations in Information Technology and the Mortgage Market," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 18(3), pages 456-483, July.
    6. Igor Livshits, 2015. "Recent Developments In Consumer Credit And Default Literature," Journal of Economic Surveys, Wiley Blackwell, vol. 29(4), pages 594-613, September.
    7. Kim, Jiseob & Lim, Taejun, 2021. "Cost-effective mortgage modification program to reduce mortgage defaults," Economic Modelling, Elsevier, vol. 96(C), pages 220-241.
    8. Dean Corbae & Erwan Quintin, 2015. "Leverage and the Foreclosure Crisis," Journal of Political Economy, University of Chicago Press, vol. 123(1), pages 1-65.
    9. Kurt Mitman, 2016. "Macroeconomic Effects of Bankruptcy and Foreclosure Policies," American Economic Review, American Economic Association, vol. 106(8), pages 2219-2255, August.
    10. John Y. Campbell & João F. Cocco, 2015. "A Model of Mortgage Default," Journal of Finance, American Finance Association, vol. 70(4), pages 1495-1554, August.
    11. Jonathan Heathcote & Kjetil Storesletten & Giovanni L. Violante, 2009. "Quantitative Macroeconomics with Heterogeneous Households," Annual Review of Economics, Annual Reviews, vol. 1(1), pages 319-354, May.
    12. Gordon, Grey, 2017. "Optimal bankruptcy code: A fresh start for some," Journal of Economic Dynamics and Control, Elsevier, vol. 85(C), pages 123-149.
    13. Satyajit Chatterjee & Burcu Eyigungor, 2015. "A Quantitative Analysis of the US Housing and Mortgage Markets and the Foreclosure Crisis," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 18(2), pages 165-184, April.
    14. Soyoung Lee, 2023. "The Macroeconomic Effects of Debt Relief Policies During Recessions," Staff Working Papers 23-48, Bank of Canada.
    15. Kim, Jiseob, 2019. "How foreclosure delays impact mortgage defaults and mortgage modifications," Journal of Macroeconomics, Elsevier, vol. 59(C), pages 18-37.
    16. Pedro Gete & Franco Zecchetto, 2018. "Distributional Implications of Government Guarantees in Mortgage Markets," The Review of Financial Studies, Society for Financial Studies, vol. 31(3), pages 1064-1097.
    17. John Y. Campbell, 2013. "Mortgage Market Design," Review of Finance, European Finance Association, vol. 17(1), pages 1-33.
    18. Krueger, D. & Mitman, K. & Perri, F., 2016. "Macroeconomics and Household Heterogeneity," Handbook of Macroeconomics, in: J. B. Taylor & Harald Uhlig (ed.), Handbook of Macroeconomics, edition 1, volume 2, chapter 0, pages 843-921, Elsevier.
    19. Kristopher Gerardi & Kyle F. Herkenhoff & Lee E. Ohanian & Paul S. Willen, 2018. "Can’t Pay or Won’t Pay? Unemployment, Negative Equity, and Strategic Default," The Review of Financial Studies, Society for Financial Studies, vol. 31(3), pages 1098-1131.
    20. Wenli Li & Costas Meghir & Florian Oswald, 2022. "Consumer Bankruptcy, Mortgage Default and Labor Supply," Working Papers 22-26, Federal Reserve Bank of Philadelphia.

    More about this item

    Keywords

    WP; down payment; price level; home equity; mortgage; default; life cycle; garnishment; default decision; house price shock; default rate; insurance coefficient; payment obligation; Housing prices; Housing; Mortgages; Consumption; Income;
    All these keywords.

    JEL classification:

    • D60 - Microeconomics - - Welfare Economics - - - General
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy

    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:imf:imfwpa:2012/026. 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: Akshay Modi (email available below). General contact details of provider: https://edirc.repec.org/data/imfffus.html .

    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.