Nothing Special   »   [go: up one dir, main page]
IDEAS home Printed from https://ideas.repec.org/p/feb/artefa/j0001.html
   My bibliography  Save this paper

On the Generalizability of Experimental Results in Economics: With A Response To Camerer

Author

Listed:
  • Omar Al-Ubaydli
  • John List
Abstract
Economists are increasingly turning to the experimental method as a means to estimate causal effects. By using randomization to identify key treatment effects, theories previously viewed as untestable are now scrutinized, efficacy of public policies are now more easily verified, and stakeholders can swiftly add empirical evidence to aid their decision-making. This study provides an overview of experimental methods in economics, with a special focus on developing an economic theory of generalizability. Given that field experiments are in their infancy, our secondary focus pertains to a discussion of the various parameters that they identify, and how they add to scientific knowledge. We conclude that until we conduct more field experiments that build a bridge between the lab and the naturally-occurring settings of interest we cannot begin to make strong conclusions empirically on the crucial question of generalizability from the lab to the field.

Suggested Citation

  • Omar Al-Ubaydli & John List, 2013. "On the Generalizability of Experimental Results in Economics: With A Response To Camerer," Artefactual Field Experiments j0001, The Field Experiments Website.
    • Handle: RePEc:feb:artefa:j0001
    as

    Download full text from publisher

    File URL: http://s3.amazonaws.com/fieldexperiments-papers2/papers/J0001.pdf
    Download Restriction: no
    ---><---

    Other versions of this item:

    References listed on IDEAS

    as
    1. Gordon Dahl & Stefano DellaVigna, 2009. "Does Movie Violence Increase Violent Crime?," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 124(2), pages 677-734.
    2. Bohm, Peter, 1972. "Estimating demand for public goods: An experiment," European Economic Review, Elsevier, vol. 3(2), pages 111-130.
    3. Eckel, Catherine C. & Grossman, Philip J., 1996. "Altruism in Anonymous Dictator Games," Games and Economic Behavior, Elsevier, vol. 16(2), pages 181-191, October.
    4. Ernst Fehr & Klaus M. Schmidt, 1999. "A Theory of Fairness, Competition, and Cooperation," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 114(3), pages 817-868.
    5. repec:feb:framed:0074 is not listed on IDEAS
    6. Ernst Fehr & Georg Kirchsteiger & Arno Riedl, 1993. "Does Fairness Prevent Market Clearing? An Experimental Investigation," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 108(2), pages 437-459.
    7. Hossain Tanjim & Morgan John, 2006. "...Plus Shipping and Handling: Revenue (Non) Equivalence in Field Experiments on eBay," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 6(2), pages 1-30, January.
    8. Smith, Vernon L & Walker, James M, 1993. "Monetary Rewards and Decision Cost in Experimental Economics," Economic Inquiry, Western Economic Association International, vol. 31(2), pages 245-261, April.
    9. Stefano DellaVigna & John A. List & Ulrike Malmendier, 2012. "Testing for Altruism and Social Pressure in Charitable Giving," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 127(1), pages 1-56.
    10. Card, David & Krueger, Alan B, 1994. "Minimum Wages and Employment: A Case Study of the Fast-Food Industry in New Jersey and Pennsylvania," American Economic Review, American Economic Association, vol. 84(4), pages 772-793, September.
    11. Daniel Rondeau & John List, 2008. "Matching and challenge gifts to charity: evidence from laboratory and natural field experiments," Experimental Economics, Springer;Economic Science Association, vol. 11(3), pages 253-267, September.
    12. Kenneth I. Wolpin & Mark R. Rosenzweig, 2000. "Natural "Natural Experiments" in Economics," Journal of Economic Literature, American Economic Association, vol. 38(4), pages 827-874, December.
    13. Oriana Bandiera & Iwan Barankay & Imran Rasul, 2005. "Social Preferences and the Response to Incentives: Evidence from Personnel Data," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 120(3), pages 917-962.
    14. repec:feb:artefa:0105 is not listed on IDEAS
    15. Armin Falk & James J. Heckman, 2009. "Lab Experiments are a Major Source of Knowledge in the Social Sciences," Working Papers 200935, Geary Institute, University College Dublin.
    16. Francisco Alpizar & Fredrik Carlsson & Olof Johansson-Stenman, 2008. "Does context matter more for hypothetical than for actual contributions? Evidence from a natural field experiment," Experimental Economics, Springer;Economic Science Association, vol. 11(3), pages 299-314, September.
    17. Steven D. Levitt & John A. List & David H. Reiley, 2010. "What Happens in the Field Stays in the Field: Exploring Whether Professionals Play Minimax in Laboratory Experiments," Econometrica, Econometric Society, vol. 78(4), pages 1413-1434, July.
    18. Glenn W. Harrison & John A. List, 2004. "Field Experiments," Journal of Economic Literature, American Economic Association, vol. 42(4), pages 1009-1055, December.
    19. repec:feb:framed:0077 is not listed on IDEAS
    20. Richard Blundell & Monica Costa Dias, 2009. "Alternative Approaches to Evaluation in Empirical Microeconomics," Journal of Human Resources, University of Wisconsin Press, vol. 44(3).
    21. John List, 2008. "Introduction to field experiments in economics with applications to the economics of charity," Experimental Economics, Springer;Economic Science Association, vol. 11(3), pages 203-212, September.
    22. Camerer, Colin F & Hogarth, Robin M, 1999. "The Effects of Financial Incentives in Experiments: A Review and Capital-Labor-Production Framework," Journal of Risk and Uncertainty, Springer, vol. 19(1-3), pages 7-42, December.
    23. Slonim, Robert & Wang, Carmen & Garbarino, Ellen & Merrett, Danielle, 2012. "Opting-In: Participation Biases in the Lab," IZA Discussion Papers 6865, Institute of Labor Economics (IZA).
    24. John A. List, 2011. "The Market for Charitable Giving," Journal of Economic Perspectives, American Economic Association, vol. 25(2), pages 157-180, Spring.
    25. Ignacio Palacios-Huerta & Oscar Volij, 2008. "Experientia Docet: Professionals Play Minimax in Laboratory Experiments," Econometrica, Econometric Society, vol. 76(1), pages 71-115, January.
    26. John A. List, 2006. "The Behavioralist Meets the Market: Measuring Social Preferences and Reputation Effects in Actual Transactions," Journal of Political Economy, University of Chicago Press, vol. 114(1), pages 1-37, February.
    27. Matthias Benz & Stephan Meier, "undated". "Do People Behave in Experiments as in the Field? � Evidence from Donations," IEW - Working Papers 248, Institute for Empirical Research in Economics - University of Zurich.
    28. Uri Gneezy & John A List, 2006. "Putting Behavioral Economics to Work: Testing for Gift Exchange in Labor Markets Using Field Experiments," Econometrica, Econometric Society, vol. 74(5), pages 1365-1384, September.
    29. repec:feb:artefa:0087 is not listed on IDEAS
    30. John List & Sally Sadoff & Mathis Wagner, 2011. "So you want to run an experiment, now what? Some simple rules of thumb for optimal experimental design," Experimental Economics, Springer;Economic Science Association, vol. 14(4), pages 439-457, November.
    31. Nancy Cartwright, 1991. "Replicability, Reproducibility, and Robustness: Comments on Harry Collins," History of Political Economy, Duke University Press, vol. 23(1), pages 143-155, Spring.
    32. Steven D. Levitt & John A. List, 2007. "Viewpoint: On the generalizability of lab behaviour to the field," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 40(2), pages 347-370, May.
    33. Henrich, Joseph & Boyd, Robert & Bowles, Samuel & Camerer, Colin & Fehr, Ernst & Gintis, Herbert (ed.), 2004. "Foundations of Human Sociality: Economic Experiments and Ethnographic Evidence from Fifteen Small-Scale Societies," OUP Catalogue, Oxford University Press, number 9780199262052.
    34. John A. List, 2011. "Why Economists Should Conduct Field Experiments and 14 Tips for Pulling One Off," Journal of Economic Perspectives, American Economic Association, vol. 25(3), pages 3-16, Summer.
    35. Vernon L. Smith, 1962. "An Experimental Study of Competitive Market Behavior," Journal of Political Economy, University of Chicago Press, vol. 70(2), pages 111-111.
    36. Colin F. Camerer & Ernst Fehr, "undated". "Measuring Social Norms and Preferences using Experimental Games: A Guide for Social Scientists," IEW - Working Papers 097, Institute for Empirical Research in Economics - University of Zurich.
    37. Peter Bohm, 1972. "Estimating the demand for public goods: An experiment," Framed Field Experiments 00126, The Field Experiments Website.
    38. Glenn W. Harrison & Morten I. Lau & E. Elisabet Rutström, 2007. "Estimating Risk Attitudes in Denmark: A Field Experiment," Scandinavian Journal of Economics, Wiley Blackwell, vol. 109(2), pages 341-368, June.
    39. repec:feb:natura:0056 is not listed on IDEAS
    40. Levitt, Steven D. & List, John A., 2009. "Field experiments in economics: The past, the present, and the future," European Economic Review, Elsevier, vol. 53(1), pages 1-18, January.
    41. Matthias Benz & Stephan Meier, 2008. "Do people behave in experiments as in the field?—evidence from donations," Experimental Economics, Springer;Economic Science Association, vol. 11(3), pages 268-281, September.
    42. Ernst Fehr & John A. List, 2004. "The Hidden Costs and Returns of Incentives-Trust and Trustworthiness Among CEOs," Journal of the European Economic Association, MIT Press, vol. 2(5), pages 743-771, September.
    43. Omar Al-Ubaydli & John List, 2012. "On the Generalizability of Experimental Results in Economics," Artefactual Field Experiments 00467, The Field Experiments Website.
    44. Edward P. Lazear & Ulrike Malmendier & Roberto A. Weber, 2012. "Sorting in Experiments with Application to Social Preferences," American Economic Journal: Applied Economics, American Economic Association, vol. 4(1), pages 136-163, January.
    45. Phelps, Edmund S, 1972. "The Statistical Theory of Racism and Sexism," American Economic Review, American Economic Association, vol. 62(4), pages 659-661, September.
    46. repec:feb:artefa:0110 is not listed on IDEAS
    47. Muriel Niederle & Lise Vesterlund, 2007. "Do Women Shy Away From Competition? Do Men Compete Too Much?," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 122(3), pages 1067-1101.
    48. Glenn W Harrison & John A List & Charles Towe, 2007. "Naturally Occurring Preferences and Exogenous Laboratory Experiments: A Case Study of Risk Aversion," Econometrica, Econometric Society, vol. 75(2), pages 433-458, March.
    49. Catherine Eckel & Philip Grossman, 2008. "Subsidizing charitable contributions: a natural field experiment comparing matching and rebate subsidies," Experimental Economics, Springer;Economic Science Association, vol. 11(3), pages 234-252, September.
    50. Steven Levitt & John List, 2008. "Homo economicus evolves," Artefactual Field Experiments 00095, The Field Experiments Website.
    51. repec:feb:artefa:0095 is not listed on IDEAS
    52. James J. Heckman, 2000. "Causal Parameters and Policy Analysis in Economics: A Twentieth Century Retrospective," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 115(1), pages 45-97.
    53. John A. List, 2003. "Does Market Experience Eliminate Market Anomalies?," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 118(1), pages 41-71.
    54. repec:feb:artefa:0094 is not listed on IDEAS
    55. Steven D. Levitt & John A. List, 2007. "What Do Laboratory Experiments Measuring Social Preferences Reveal About the Real World?," Journal of Economic Perspectives, American Economic Association, vol. 21(2), pages 153-174, Spring.
    56. Steven Levitt & John List & David Reiley, 2010. "What happens in the field stays in the field: Professionals do not play minimax in laboratory experiments," Artefactual Field Experiments 00080, The Field Experiments Website.
    57. repec:feb:framed:0087 is not listed on IDEAS
    58. Zacharias Maniadis & Fabio Tufano & John A. List, 2014. "One Swallow Doesn't Make a Summer: New Evidence on Anchoring Effects," American Economic Review, American Economic Association, vol. 104(1), pages 277-290, January.
    59. Colin F. Camerer & Richard H. Thaler, 1995. "Anomalies: Ultimatums, Dictators and Manners," Journal of Economic Perspectives, American Economic Association, vol. 9(2), pages 209-219, Spring.
    60. John A. List, 2009. "The Economics of Open Air Markets," NBER Working Papers 15420, National Bureau of Economic Research, Inc.
    61. repec:feb:natura:0053 is not listed on IDEAS
    62. John A. List, 2004. "Neoclassical Theory Versus Prospect Theory: Evidence from the Marketplace," Econometrica, Econometric Society, vol. 72(2), pages 615-625, March.
    63. Kahneman, Daniel & Knetsch, Jack L & Thaler, Richard, 1986. "Fairness as a Constraint on Profit Seeking: Entitlements in the Market," American Economic Review, American Economic Association, vol. 76(4), pages 728-741, September.
    64. Alpizar, Francisco & Carlsson, Fredrik & Johansson-Stenman, Olof, 2008. "Full title Does Context Matter More for Hypothetical Than for Actual Contributions? Evidence from a Natural Field Experiment," RFF Working Paper Series dp-08-02-efd, Resources for the Future.
    65. Hunter, John E, 2001. "The Desperate Need for Replications," Journal of Consumer Research, Journal of Consumer Research Inc., vol. 28(1), pages 149-158, June.
    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. Gill, Andrej & Hett, Florian & Tischer, Johannes, 2022. "Time inconsistency and overdraft use: Evidence from transaction data and behavioral measurement experiments," SAFE Working Paper Series 347, Leibniz Institute for Financial Research SAFE.
    2. Luís Pacheco & Júlio Lobão & Sílvia Coelho, 2023. "Gender and Risk Aversion: Evidence from a Natural Experiment," Games, MDPI, vol. 14(3), pages 1-16, June.
    3. Potters, Jan & Stoop, Jan, 2016. "Do cheaters in the lab also cheat in the field?," European Economic Review, Elsevier, vol. 87(C), pages 26-33.
    4. Beck, Adrian & Kerschbamer, Rudolf & Qiu, Jianying & Sutter, Matthias, 2014. "Car mechanics in the lab––Investigating the behavior of real experts on experimental markets for credence goods," Journal of Economic Behavior & Organization, Elsevier, vol. 108(C), pages 166-173.
    5. Christiane Bradler & Robert Dur & Susanne Neckermann & Arjan Non, 2013. "Employee Recognition and Performance: A Field Experiment," Tinbergen Institute Discussion Papers 13-038/VII, Tinbergen Institute.
    6. Ashkan Pakseresht & Brandon R McFadden & Carl Johan Lagerkvist, 2017. "Consumer acceptance of food biotechnology based on policy context and upstream acceptance: evidence from an artefactual field experiment," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 44(5), pages 757-780.
    7. Aflagah, Kodjo & Bernard, Tanguy & Viceisza, Angelino, 2022. "Cheap talk and coordination in the lab and in the field: Collective commercialization in Senegal," Journal of Development Economics, Elsevier, vol. 154(C).
    8. Ferré, Marie & Engel, Stefanie & Gsottbauer, Elisabeth, 2022. "Incentivizing coordination in the adoption of sustainable land use when costs are heterogeneous: An economic experiment," Land Use Policy, Elsevier, vol. 123(C).
    9. John A. List & Robert Metcalfe, 2014. "Field experiments in the developed world: an introduction," Oxford Review of Economic Policy, Oxford University Press and Oxford Review of Economic Policy Limited, vol. 30(4), pages 585-596.
    10. Damon Alexander & Christopher Boone & Michael Lynnb, 2021. "The Effects of Tip Recommendations on Customer Tipping, Satisfaction, Repatronage, and Spending," Management Science, INFORMS, vol. 67(1), pages 146-165, January.
    11. Andrej Gill & Florian Hett & Johannes Tischer, 2022. "Time Inconsistency and Overdraft Use: Evidence from Transaction Data and Behavioral Measurement Experiments," Working Papers 2205, Gutenberg School of Management and Economics, Johannes Gutenberg-Universität Mainz.
    12. Gill, Andrej & Hett, Florian & Tischer, Johannes, 2022. "Time inconsistency and overdraft use: Evidence from transaction data and behavioral measurement experiments," Discussion Papers 18/2022, Deutsche Bundesbank.
    13. Eszter Czibor & David Jimenez‐Gomez & John A. List, 2019. "The Dozen Things Experimental Economists Should Do (More of)," Southern Economic Journal, John Wiley & Sons, vol. 86(2), pages 371-432, October.
    14. David Hardt & Lea Mayer & Johannes Rincke, 2023. "Who Does the Talking Here? The Impact of Gender Composition on Team Interactions," CESifo Working Paper Series 10550, CESifo.
    15. Saurabh A. Lall & Li-Wei Chen & Dyana P. Mason, 2023. "Digital platforms and entrepreneurial support: a field experiment in online mentoring," Small Business Economics, Springer, vol. 61(2), pages 631-654, August.
    16. John List, 2021. "2021 Summary Data of Artefactual Field Experiments Published on Fieldexperiments.com," Artefactual Field Experiments 00749, The Field Experiments Website.
    17. Antinyan, Armenak & Corazzini, Luca, 2023. "Breaking the Bag Habit: Testing Interventions to Reduce Plastic Bag Demand in a Developing Country," Cardiff Economics Working Papers E2023/7, Cardiff University, Cardiff Business School, Economics Section.
    18. John List, 2022. "Framed Field Experiments: 2021 Summary on Fieldexperiments.com," Framed Field Experiments 00752, The Field Experiments Website.
    19. Dannenberg, Astrid & Weingärtner, Eva, 2023. "The effects of observability and an information nudge on food choice," Journal of Environmental Economics and Management, Elsevier, vol. 120(C).
    20. Antinyan, Armenak & Corazzini, Luca, 2021. "Money does it better! Economic incentives, nudging interventions and reusable shopping bags: Evidence from a natural field experiment," Cardiff Economics Working Papers E2021/29, Cardiff University, Cardiff Business School, Economics Section.
    21. Difang Huang & Zhengyang Bao, 2020. "Gender Differences in Reaction to Enforcement Mechanisms: A Large-Scale Natural Field Experiment," Monash Economics Working Papers 08-20, Monash University, Department of Economics.
    22. Andrea Albertazzi, 2022. "Individual cheating in the lab: a new measure and external validity," Theory and Decision, Springer, vol. 93(1), pages 37-67, July.
    23. Florian Englmaier & Andreas Roider & Uwe Sunde, 2017. "The Role of Communication of Performance Schemes: Evidence from a Field Experiment," Management Science, INFORMS, vol. 63(12), pages 4061-4080, December.
    24. Ferré, Marie & Engel, Stefanie & Gsottbauer, Elisabeth, 2018. "Which Agglomeration Payment for a Sustainable Management of Organic Soils in Switzerland? – An Experiment Accounting for Farmers' Cost Heterogeneity," Ecological Economics, Elsevier, vol. 150(C), pages 24-33.

    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. Omar Al-Ubaydli & John A. List, 2013. "On the Generalizability of Experimental Results in Economics: With a Response to Commentors," CESifo Working Paper Series 4543, CESifo.
    2. Omar Al-Ubaydli & John List, 2012. "On the Generalizability of Experimental Results in Economics," Artefactual Field Experiments 00467, The Field Experiments Website.
    3. Matteo M. Galizzi & Daniel Navarro-Martinez, 2019. "On the External Validity of Social Preference Games: A Systematic Lab-Field Study," Management Science, INFORMS, vol. 65(3), pages 976-1002, March.
    4. Eszter Czibor & David Jimenez‐Gomez & John A. List, 2019. "The Dozen Things Experimental Economists Should Do (More of)," Southern Economic Journal, John Wiley & Sons, vol. 86(2), pages 371-432, October.
    5. List John A., 2007. "Field Experiments: A Bridge between Lab and Naturally Occurring Data," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 6(2), pages 1-47, April.
    6. Jan Stoop, 2014. "From the lab to the field: envelopes, dictators and manners," Experimental Economics, Springer;Economic Science Association, vol. 17(2), pages 304-313, June.
    7. Omar Al-Ubaydli & John A. List, 2019. "How natural field experiments have enhanced our understanding of unemployment," Nature Human Behaviour, Nature, vol. 3(1), pages 33-39, January.
    8. Stefano DellaVigna, 2009. "Psychology and Economics: Evidence from the Field," Journal of Economic Literature, American Economic Association, vol. 47(2), pages 315-372, June.
    9. Omar Al-Ubaydli & John List, 2016. "Field Experiments in Markets," Artefactual Field Experiments j0002, The Field Experiments Website.
    10. Levitt, Steven D. & List, John A., 2009. "Field experiments in economics: The past, the present, and the future," European Economic Review, Elsevier, vol. 53(1), pages 1-18, January.
    11. Eric Floyd & John A. List, 2016. "Using Field Experiments in Accounting and Finance," Journal of Accounting Research, Wiley Blackwell, vol. 54(2), pages 437-475, May.
    12. Brit Grosskopf & Graeme Pearce, 2020. "Do You Mind Me Paying Less? Measuring Other-Regarding Preferences in the Market for Taxis," Management Science, INFORMS, vol. 66(11), pages 5059-5074, November.
    13. John List, 2008. "Introduction to field experiments in economics with applications to the economics of charity," Experimental Economics, Springer;Economic Science Association, vol. 11(3), pages 203-212, September.
    14. Glenn W. Harrison & John A. List, 2004. "Field Experiments," Journal of Economic Literature, American Economic Association, vol. 42(4), pages 1009-1055, December.
    15. Dohmen, Thomas, 2014. "Behavioral labor economics: Advances and future directions," Labour Economics, Elsevier, vol. 30(C), pages 71-85.
    16. John A. List, 2014. "Using Field Experiments to Change the Template of How We Teach Economics," The Journal of Economic Education, Taylor & Francis Journals, vol. 45(2), pages 81-89, June.
    17. Jan Stoop & Charles N. Noussair & Daan van Soest, 2012. "From the Lab to the Field: Cooperation among Fishermen," Journal of Political Economy, University of Chicago Press, vol. 120(6), pages 1027-1056.
    18. Slonim, Robert & Wang, Carmen & Garbarino, Ellen & Merrett, Danielle, 2013. "Opting-in: Participation bias in economic experiments," Journal of Economic Behavior & Organization, Elsevier, vol. 90(C), pages 43-70.
    19. Slonim, Robert & Wang, Carmen & Garbarino, Ellen & Merrett, Danielle, 2012. "Opting-In: Participation Biases in the Lab," IZA Discussion Papers 6865, Institute of Labor Economics (IZA).
    20. Gautam Gupta, 2019. "Experiments in Economics: A Survey," Studies in Microeconomics, , vol. 7(1), pages 89-109, June.

    More about this item

    JEL classification:

    • C9 - Mathematical and Quantitative Methods - - Design of Experiments
    • C90 - Mathematical and Quantitative Methods - - Design of Experiments - - - General
    • C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
    • C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior
    • C93 - Mathematical and Quantitative Methods - - Design of Experiments - - - Field Experiments

    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:feb:artefa:j0001. 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: Francesca Pagnotta (email available below). General contact details of provider: http://www.fieldexperiments.com .

    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.