IDEAS home Printed from https://ideas.repec.org/a/eee/tefoso/v113y2016ipbp206-219.html
   My bibliography  Save this article

The impact of public support on firm propensity to engage in R&D: Spanish experience

Author

Listed:
  • Huergo, Elena
  • Trenado, Mayte
  • Ubierna, Andrés

Abstract

Our objective is to estimate the effect of public low-interest loans for R&D projects on the probability of performing R&D by Spanish firms. The estimations provide evidence of the effectiveness of public low-interest loans, being the stimulus effect larger for SMEs than for large firms and also higher for manufacturing than for services. Supported firms are approximately 25 percentage points more likely to self-finance their R&D investments than non-supported firms. The effect is quite relevant if we consider that the probability of self-financing R&D activities is 53.2 percentage points higher when the firm has invested in R&D activities in the previous year. This result suggests that firms can be induced persistently to perform R&D activities by means of loans.

Suggested Citation

  • Huergo, Elena & Trenado, Mayte & Ubierna, Andrés, 2016. "The impact of public support on firm propensity to engage in R&D: Spanish experience," Technological Forecasting and Social Change, Elsevier, vol. 113(PB), pages 206-219.
    • Handle: RePEc:eee:tefoso:v:113:y:2016:i:pb:p:206-219
    DOI: 10.1016/j.techfore.2015.05.011
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0040162515001304
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.techfore.2015.05.011?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
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Wladimir Raymond & Pierre Mohnen & Franz Palm & Sybrand Schim van der Loeff, 2010. "Persistence of Innovation in Dutch Manufacturing: Is It Spurious?," The Review of Economics and Statistics, MIT Press, vol. 92(3), pages 495-504, August.
    2. Czarnitzki, Dirk & Lopes-Bento, Cindy, 2013. "Value for money? New microeconometric evidence on public R&D grants in Flanders," Research Policy, Elsevier, vol. 42(1), pages 76-89.
    3. Dirk Czarnitzki & Hanna Hottenrott & Susanne Thorwarth, 2011. "Industrial research versus development investment: the implications of financial constraints," Cambridge Journal of Economics, Cambridge Political Economy Society, vol. 35(3), pages 527-544.
    4. José Ángel Zúñiga-Vicente & César Alonso-Borrego & Francisco J. Forcadell & José I. Galán, 2014. "Assessing The Effect Of Public Subsidies On Firm R&D Investment: A Survey," Journal of Economic Surveys, Wiley Blackwell, vol. 28(1), pages 36-67, February.
    5. Jeffrey M. Wooldridge, 2005. "Simple solutions to the initial conditions problem in dynamic, nonlinear panel data models with unobserved heterogeneity," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 20(1), pages 39-54, January.
    6. Charles Bérubé & Pierre Mohnen, 2009. "Are firms that receive R&D subsidies more innovative?," Canadian Journal of Economics, Canadian Economics Association, vol. 42(1), pages 206-225, February.
    7. Xulia González & Jordi Jaumandreu & Consuelo Pazo, 2005. "Barriers to Innovation and Subsidy Effectiveness," RAND Journal of Economics, The RAND Corporation, vol. 36(4), pages 930-949, Winter.
    8. Bertoni, Fabio & Colombo, Massimo G. & Grilli, Luca, 2011. "Venture capital financing and the growth of high-tech start-ups: Disentangling treatment from selection effects," Research Policy, Elsevier, vol. 40(7), pages 1028-1043, September.
    9. Spyros Arvanitis, 2013. "Micro-econometric approaches to the evaluation of technology-oriented public programmes: a non-technical review of the state of the art," Chapters, in: Albert N. Link & Nicholas S. Vonortas (ed.), Handbook on the Theory and Practice of Program Evaluation, chapter 3, pages 56-88, Edward Elgar Publishing.
    10. Isabel Busom, 2000. "An Empirical Evaluation of The Effects of R&D Subsidies," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 9(2), pages 111-148.
    11. Pere Arqué-Castells & Pierre Mohnen, 2015. "Sunk Costs, Extensive R&D Subsidies and Permanent Inducement Effects," Journal of Industrial Economics, Wiley Blackwell, vol. 63(3), pages 458-494, September.
    12. Bettina Peters, 2009. "Persistence of innovation: stylised facts and panel data evidence," The Journal of Technology Transfer, Springer, vol. 34(2), pages 226-243, April.
    13. James J. Heckman & Sergio Urzua & Edward Vytlacil, 2006. "Understanding Instrumental Variables in Models with Essential Heterogeneity," The Review of Economics and Statistics, MIT Press, vol. 88(3), pages 389-432, August.
    14. Blanes, J. Vicente & Busom, Isabel, 2004. "Who participates in R&D subsidy programs?: The case of Spanish manufacturing firms," Research Policy, Elsevier, vol. 33(10), pages 1459-1476, December.
    15. Joost Heijs, 2005. "Identification of firms supported by technology policies: the case of Spanish low interest credits," Science and Public Policy, Oxford University Press, vol. 32(3), pages 219-230, June.
    16. repec:zbw:bofrdp:2013_002 is not listed on IDEAS
    17. Hall, Bronwyn H. & Lerner, Josh, 2010. "The Financing of R&D and Innovation," Handbook of the Economics of Innovation, in: Bronwyn H. Hall & Nathan Rosenberg (ed.), Handbook of the Economics of Innovation, edition 1, volume 1, chapter 0, pages 609-639, Elsevier.
    18. Klepper, Steven, 1996. "Entry, Exit, Growth, and Innovation over the Product Life Cycle," American Economic Review, American Economic Association, vol. 86(3), pages 562-583, June.
    19. Geroski, P. A. & Van Reenen, J. & Walters, C. F., 1997. "How persistently do firms innovate?," Research Policy, Elsevier, vol. 26(1), pages 33-48, March.
    20. López, Alberto, 2011. "The effect of microaggregation on regression results: an application to Spanish innovation data," MPRA Paper 30403, University Library of Munich, Germany.
    21. Almus, Matthias & Czarnitzki, Dirk, 2003. "The Effects of Public R&D Subsidies on Firms' Innovation Activities: The Case of Eastern Germany," Journal of Business & Economic Statistics, American Statistical Association, vol. 21(2), pages 226-236, April.
    22. David, Paul A. & Hall, Bronwyn H. & Toole, Andrew A., 2000. "Is public R&D a complement or substitute for private R&D? A review of the econometric evidence," Research Policy, Elsevier, vol. 29(4-5), pages 497-529, April.
    23. Veugelers, Reinhilde & Cassiman, Bruno, 2002. "Complementarity in the Innovation Strategy: Internal R&D, External Technology Acquisition and Cooperation," CEPR Discussion Papers 3284, C.E.P.R. Discussion Papers.
    24. DUGUET Emmanuel, 2004. "Are R&D subsidies a substitute or a complement to privately funded R&D? Evidence from France using propensity score methods for non- experimental data," Public Economics 0411007, University Library of Munich, Germany.
    25. Lach, Saul, 2002. "Do R&D Subsidies Stimulate or Displace Private R&D? Evidence from Israel," Journal of Industrial Economics, Wiley Blackwell, vol. 50(4), pages 369-390, December.
    26. Maria Luisa Mancusi & Andrea Vezzulli, 2014. "R&D AND CREDIT RATIONING IN SMEs," Economic Inquiry, Western Economic Association International, vol. 52(3), pages 1153-1172, July.
    27. Takalo, Tuomas & Tanayama, Tanja & Toivanen, Otto, 2013. "Market failures and the additionality effects of public support to private R&D: Theory and empirical implications," International Journal of Industrial Organization, Elsevier, vol. 31(5), pages 634-642.
    28. Borrás, Susana & Edquist, Charles, 2013. "The choice of innovation policy instruments," Technological Forecasting and Social Change, Elsevier, vol. 80(8), pages 1513-1522.
    29. Bronwyn Hall, 2004. "The financing of research and development," Chapters, in: Anthony Bartzokas & Sunil Mani (ed.), Financial Systems, Corporate Investment in Innovation, and Venture Capital, chapter 2, Edward Elgar Publishing.
    30. Oliviero Carboni, 2011. "R&D subsidies and private R&D expenditures: evidence from Italian manufacturing data," International Review of Applied Economics, Taylor & Francis Journals, vol. 25(4), pages 419-439.
    31. Tuomas Takalo & Tanja Tanayama & Otto Toivanen, 2013. "Estimating the Benefits of Targeted R&D Subsidies," The Review of Economics and Statistics, MIT Press, vol. 95(1), pages 255-272, March.
    32. Heckman, James, 2013. "Sample selection bias as a specification error," Applied Econometrics, Russian Presidential Academy of National Economy and Public Administration (RANEPA), vol. 31(3), pages 129-137.
    33. Giovanni Cerulli & Bianca Potì, 2012. "Evaluating the Robustness of the Effect of Public Subsidies on Firms' R&D: An Application to Italy," Journal of Applied Economics, Taylor & Francis Journals, vol. 15(2), pages 287-320, November.
    34. Bloom, Nick & Griffith, Rachel & Van Reenen, John, 2002. "Do R&D tax credits work? Evidence from a panel of countries 1979-1997," Journal of Public Economics, Elsevier, vol. 85(1), pages 1-31, July.
    35. Kenneth Arrow, 1962. "Economic Welfare and the Allocation of Resources for Invention," NBER Chapters, in: The Rate and Direction of Inventive Activity: Economic and Social Factors, pages 609-626, National Bureau of Economic Research, Inc.
    36. Albert N. Link & Nicholas S. Vonortas (ed.), 2013. "Handbook on the Theory and Practice of Program Evaluation," Books, Edward Elgar Publishing, number 14384.
    37. Huergo, Elena & Jaumandreu, Jordi, 2004. "Firms' age, process innovation and productivity growth," International Journal of Industrial Organization, Elsevier, vol. 22(4), pages 541-559, April.
    38. Elena Huergo & Mayte Trenado, 2010. "The Application for and the Awarding of Low-Interest Credits to Finance R&D Projects," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 37(3), pages 237-259, November.
    39. Klette, Tor Jakob & Moen, Jarle & Griliches, Zvi, 2000. "Do subsidies to commercial R&D reduce market failures? Microeconometric evaluation studies1," Research Policy, Elsevier, vol. 29(4-5), pages 471-495, April.
    40. Aerts, Kris & Schmidt, Tobias, 2008. "Two for the price of one?: Additionality effects of R&D subsidies: A comparison between Flanders and Germany," Research Policy, Elsevier, vol. 37(5), pages 806-822, June.
    41. Saul Lach, 2002. "Do R&D Subsidies Stimulate or Displace Private R&D? Evidence from Israel," Journal of Industrial Economics, Wiley Blackwell, vol. 50(4), pages 369-390, December.
    42. Himmelberg, Charles P & Petersen, Bruce C, 1994. "R&D and Internal Finance: A Panel Study of Small Firms in High-Tech Industries," The Review of Economics and Statistics, MIT Press, vol. 76(1), pages 38-51, February.
    43. Pere Arqué-Castells & Pierre Mohnen, 2015. "Sunk Costs, Extensive R&D Subsidies and Permanent Inducement Effects," Journal of Industrial Economics, Wiley Blackwell, vol. 63(3), pages 458-494, September.
    44. Juan A. Máñez & María E. Rochina‐Barrachina & Amparo Sanchis & Juan A. Sanchis, 2009. "The Role Of Sunk Costs In The Decision To Invest In R&D," Journal of Industrial Economics, Wiley Blackwell, vol. 57(4), pages 712-735, December.
    45. David B. Audretsch, 1995. "Innovation and Industry Evolution," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262011468, December.
    46. Cassiman, Bruno & Veugelers, Reinhilde, 2002. "Complementarity in the innovation strategy: Internal R&D, external technology acquisition, and cooperation in R&D," IESE Research Papers D/457, IESE Business School.
    47. Scott J. Wallsten, 2000. "The Effects of Government-Industry R&D Programs on Private R&D: The Case of the Small Business Innovation Research Program," RAND Journal of Economics, The RAND Corporation, vol. 31(1), pages 82-100, Spring.
    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. Edina Berlinger & Anita Lovas & Péter Juhász, 2017. "State subsidy and moral hazard in corporate financing," Central European Journal of Operations Research, Springer;Slovak Society for Operations Research;Hungarian Operational Research Society;Czech Society for Operations Research;Österr. Gesellschaft für Operations Research (ÖGOR);Slovenian Society Informatika - Section for Operational Research;Croatian Operational Research Society, vol. 25(4), pages 743-770, December.
    2. Sancho-Bosch, Diego & Guerrero, Alex J. & Heijs, Joost, 2022. "Technology policy evaluation: The interaction between the financial constraint of firms and level of financial additionality," MPRA Paper 114659, University Library of Munich, Germany.
    3. Barajas, Ascensión & Huergo, Elena & Moreno, Lourdes, 2017. "Public Support to Business R&D and the Economic Crisis: Spanish Evidence," MPRA Paper 81529, University Library of Munich, Germany.
    4. Yasunori Yamashita & Hoang Ngan Giang & Tatsuo Oyama, 2019. "Assessing the Performance of Japanese Major Universities through the Research Funding System," International Journal of Higher Education, Sciedu Press, vol. 8(1), pages 1-1, February.
    5. Bianchini, Stefano & Llerena, Patrick & Martino, Roberto, 2019. "The impact of R&D subsidies under different institutional frameworks," Structural Change and Economic Dynamics, Elsevier, vol. 50(C), pages 65-78.
    6. Zhao, Shukuan & Xu, Baoda & Zhang, Weiyong, 2018. "Government R&D subsidy policy in China: An empirical examination of effect, priority, and specifics," Technological Forecasting and Social Change, Elsevier, vol. 135(C), pages 75-82.
    7. Zhang, JingJing & Guan, Jiancheng, 2018. "The time-varying impacts of government incentives on innovation," Technological Forecasting and Social Change, Elsevier, vol. 135(C), pages 132-144.
    8. Ana M. Silva & Sandra T. Silva & Anabela Carneiro, 2017. "Determinants of grant decisions in R&D subsidy programmes: Evidence from firms and S&T organisations in Portugal," Science and Public Policy, Oxford University Press, vol. 44(5), pages 683-697.
    9. Xiang, Xiaojian & Liu, Chuanjiang & Yang, Mian, 2022. "Who is financing corporate green innovation?," International Review of Economics & Finance, Elsevier, vol. 78(C), pages 321-337.
    10. Ascensión Barajas & Elena Huergo & Lourdes Moreno, 2021. "The role of public loans in financing business R&D through the economic cycle," Economia Politica: Journal of Analytical and Institutional Economics, Springer;Fondazione Edison, vol. 38(2), pages 505-538, July.
    11. Fanbo Li & Hongfeng Zhang, 2022. "How the “Absorption Processes” of Urban Innovation Contribute to Sustainable Development—A Fussy Set Qualitative Comparative Analysis Based on Seventy-Two Cities in China," Sustainability, MDPI, vol. 14(23), pages 1-22, November.
    12. Chundakkadan, Radeef & Sasidharan, Subash, 2023. "The role of government support on E-commerce and firm innovation during pandemic crisis," Economic Analysis and Policy, Elsevier, vol. 78(C), pages 904-913.
    13. Kais Mtar & Walid Belazreg, 2023. "On the nexus of innovation, trade openness, financial development and economic growth in European countries: New perspective from a GMM panel VAR approach," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 28(1), pages 766-791, January.
    14. Tea Petrin & Dragana Radicic, 2023. "Instrument policy mix and firm size: is there complementarity between R&D subsidies and R&D tax credits?," The Journal of Technology Transfer, Springer, vol. 48(1), pages 181-215, February.
    15. Huergo, Elena & Moreno, Lourdes, 2017. "Subsidies or loans? Evaluating the impact of R&D support programmes," Research Policy, Elsevier, vol. 46(7), pages 1198-1214.
    16. Carboni, Oliviero A., 2017. "The effect of public support on investment and R&D: An empirical evaluation on European manufacturing firms," Technological Forecasting and Social Change, Elsevier, vol. 117(C), pages 282-295.
    17. Cátia Rosário & Celeste Varum & Anabela Botelho, 2022. "Impact of Public Support for Innovation on Company Performance: Review and Meta-Analysis," Sustainability, MDPI, vol. 14(8), pages 1-16, April.
    18. Jugend, Daniel & Fiorini, Paula De Camargo & Armellini, Fabiano & Ferrari, Aline Gabriela, 2020. "Public support for innovation: A systematic review of the literature and implications for open innovation," Technological Forecasting and Social Change, Elsevier, vol. 156(C).
    19. Isabel Busom & Beatriz Corchuelo & Ester Martínez-Ros, 2017. "Participation inertia in R&D tax incentive and subsidy programs," Small Business Economics, Springer, vol. 48(1), pages 153-177, January.
    20. Trabelsi Ramzi & Kallal Rahim & Maher Skhiri, 2023. "Scientific Knowledge Valorization in the Public R&D Sector: a Survey and a PLS-SEM Approach," Journal of the Knowledge Economy, Springer;Portland International Center for Management of Engineering and Technology (PICMET), vol. 14(1), pages 226-254, March.
    21. Cristiano Antonelli, 2020. "Knowledge exhaustibility public support to business R&D and the additionality constraint," The Journal of Technology Transfer, Springer, vol. 45(3), pages 649-663, June.
    22. Bettina Becker, 2020. "The Impact of Innovation Policy on Firm Innovation and Performance: A Review of Recent Research Developments," ifo DICE Report, ifo Institute - Leibniz Institute for Economic Research at the University of Munich, vol. 17(04), pages 10-15, January.
    23. Jennifer González-Blanco & Mercedes Vila-Alonso & Manuel Guisado-González, 2019. "Public Support Agencies for Innovation in Multilevel Governance Systems: Exploring the Existence of Signs of Complementarity and Substitution," Sustainability, MDPI, vol. 11(20), pages 1-16, October.
    24. Zhu, Lin & Cunningham, Scott W., 2022. "Unveiling the knowledge structure of technological forecasting and social change (1969–2020) through an NMF-based hierarchical topic model," Technological Forecasting and Social Change, Elsevier, vol. 174(C).
    25. Dumont, Michel, 2017. "Assessing the policy mix of public support to business R&D," Research Policy, Elsevier, vol. 46(10), pages 1851-1862.

    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. Huergo, E. & Trenado, Mayte / M. & Ubierna, Andrés / A., 2013. "Impact of low-interest credits on business R&D expenditures: Spanish firms and CDTI loans for R&D projects," MPRA Paper 44221, University Library of Munich, Germany.
    2. Huergo, Elena & Moreno, Lourdes, 2017. "Subsidies or loans? Evaluating the impact of R&D support programmes," Research Policy, Elsevier, vol. 46(7), pages 1198-1214.
    3. Thomas H. W. Ziesemer, 2021. "The Effects of R&D Subsidies and Publicly Performed R&D on Business R&D: A Survey," Hacienda Pública Española / Review of Public Economics, IEF, vol. 236(1), pages 171-205, March.
    4. Michel Dumont, 2015. "Working Paper 05-15 - Evaluation of federal tax incentives for private R&D in Belgium: An update," Working Papers 1505, Federal Planning Bureau, Belgium.
    5. Hud, Martin & Hussinger, Katrin, 2015. "The impact of R&D subsidies during the crisis," Research Policy, Elsevier, vol. 44(10), pages 1844-1855.
    6. Ugur, Mehmet & Trushin, Eshref & Solomon, Edna, 2015. "UK and EU subsidies and private R&D investment: Is there input additionality?," MPRA Paper 68009, University Library of Munich, Germany, revised 16 Nov 2015.
    7. Bettina Becker, 2013. "The Determinants of R&D Investment: A Survey of the Empirical Research," Discussion Paper Series 2013_09, Department of Economics, Loughborough University, revised Sep 2013.
    8. Sergio Afcha & Jose García-Quevedo, 2016. "The impact of R&D subsidies on R&D employment composition," Industrial and Corporate Change, Oxford University Press and the Associazione ICC, vol. 25(6), pages 955-975.
    9. Czarnitzki, Dirk & Lopes-Bento, Cindy, 2013. "Value for money? New microeconometric evidence on public R&D grants in Flanders," Research Policy, Elsevier, vol. 42(1), pages 76-89.
    10. Silva Filipe & Carreira Carlos, 2017. "Financial Constraints: Do They Matter to Allocate R&D Subsidies?," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 17(4), pages 1-26, October.
    11. Isabel Busom & Beatriz Corchuelo & Ester Martínez-Ros, 2017. "Participation inertia in R&D tax incentive and subsidy programs," Small Business Economics, Springer, vol. 48(1), pages 153-177, January.
    12. Sergio Afcha & Jose García-Quevedo, 2016. "The impact of R&D subsidies on R&D employment composition," Industrial and Corporate Change, Oxford University Press, vol. 25(6), pages 955-975.
    13. Wang, Yanbo & Li, Jizhen & Furman, Jeffrey L., 2017. "Firm performance and state innovation funding: Evidence from China’s innofund program," Research Policy, Elsevier, vol. 46(6), pages 1142-1161.
    14. Marco Mariani & Fabrizia Mealli, 2018. "The Effects of R&D Subsidies to Small and Medium-Sized Enterprises. Evidence from a Regional Program," Italian Economic Journal: A Continuation of Rivista Italiana degli Economisti and Giornale degli Economisti, Springer;Società Italiana degli Economisti (Italian Economic Association), vol. 4(2), pages 249-281, July.
    15. José Ángel Zúñiga-Vicente & César Alonso-Borrego & Francisco J. Forcadell & José I. Galán, 2014. "Assessing The Effect Of Public Subsidies On Firm R&D Investment: A Survey," Journal of Economic Surveys, Wiley Blackwell, vol. 28(1), pages 36-67, February.
    16. Bronzini, Raffaello & Piselli, Paolo, 2016. "The impact of R&D subsidies on firm innovation," Research Policy, Elsevier, vol. 45(2), pages 442-457.
    17. LOPES BENTO Cindy & CZARNITZKI Dirk, 2012. "Value for money? New microeconomic evidence on public R&D grants in Flanders," LISER Working Paper Series 2012-19, Luxembourg Institute of Socio-Economic Research (LISER).
    18. Syoum Negassi & Jean-Francois Sattin, 2014. "Evaluation of Public R&D Policy: A Meta-Regression Analysis," Working Papers 14-09, University of Delaware, Department of Economics.
    19. Giovanni Cerulli, 2008. "Modelling and measuring the effects of public subsidies on business R&D: theoretical and econometric issues," CERIS Working Paper 200803, CNR-IRCrES Research Institute on Sustainable Economic Growth - Torino (TO) ITALY - former Institute for Economic Research on Firms and Growth - Moncalieri (TO) ITALY.
    20. Özçelik, Emre & Taymaz, Erol, 2008. "R&D support programs in developing countries: The Turkish experience," Research Policy, Elsevier, vol. 37(2), pages 258-275, March.

    More about this item

    Keywords

    Public support; R&D projects; Impact analysis; R&D extensive margin;
    All these keywords.

    JEL classification:

    • H81 - Public Economics - - Miscellaneous Issues - - - Governmental Loans; Loan Guarantees; Credits; Grants; Bailouts
    • L20 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - General
    • O38 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Government Policy

    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:tefoso:v:113:y:2016:i:pb:p:206-219. 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: http://www.sciencedirect.com/science/journal/00401625 .

    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.