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Correlation Neglect in Financial Decision-Making

Author

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  • Erik Eyster
  • Georg Weizsäcker

Abstract

Good decision-making often requires people to perceive and handle a myriad of statistical correlations. Notably, optimal portfolio theory depends upon a sophisticated understanding of the correlation among financial assets. In this paper, we examine people's understanding of correlation using a sequence of portfolio-allocation problems and find it to be strongly imperfect. Our experiment uses pairs of portfolio-choice problems that have the same asset span - identical sets of attainable returns - and differ only in the assets' correlation. While any outcome-based theory of choice makes the same prediction across paired problems, subjects behave very differently across pairs. We find evidence for correlation neglect - treating correlated variables as uncorrelated - as well as for a form of "1/N heuristic" - investing half of wealth each of the two available assets.

Suggested Citation

  • Erik Eyster & Georg Weizsäcker, 2011. "Correlation Neglect in Financial Decision-Making," Discussion Papers of DIW Berlin 1104, DIW Berlin, German Institute for Economic Research.
  • Handle: RePEc:diw:diwwpp:dp1104
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    File URL: http://www.diw.de/documents/publikationen/73/diw_01.c.368611.de/dp1104.pdf
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    1. Zoltan Acs & Catherine Armington, 2004. "Employment Growth and Entrepreneurial Activity in Cities," Regional Studies, Taylor & Francis Journals, vol. 38(8), pages 911-927.
    2. David Audretsch & Max Keilbach, 2004. "Entrepreneurship Capital and Economic Performance," Regional Studies, Taylor & Francis Journals, vol. 38(8), pages 949-959.
    3. Olivier Parent & James P. LeSage, 2008. "Using the variance structure of the conditional autoregressive spatial specification to model knowledge spillovers," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 23(2), pages 235-256.
    4. James Lesage & Manfred Fischer, 2008. "Spatial Growth Regressions: Model Specification, Estimation and Interpretation," Spatial Economic Analysis, Taylor & Francis Journals, vol. 3(3), pages 275-304.
    5. Zoltán J. Ács & Pontus Braunerhjelm & David B. Audretsch & Bo Carlsson, 2015. "The knowledge spillover theory of entrepreneurship," Chapters,in: Global Entrepreneurship, Institutions and Incentives, chapter 7, pages 129-144 Edward Elgar Publishing.
    6. James Paul Lesage & Wolfgang Polasek, 2008. "Incorporating Transportation Network Structure in Spatial Econometric Models of Commodity Flows," Spatial Economic Analysis, Taylor & Francis Journals, vol. 3(2), pages 225-245.
    7. Barro, Robert J. & Lee, Jong-Wha, 1993. "International comparisons of educational attainment," Journal of Monetary Economics, Elsevier, vol. 32(3), pages 363-394, December.
    8. Adela Nistor, 2009. "Assessing the Effectiveness of Human Capital Investments on the Regional Unemployment Rate in the United States: 1990 and 2000," International Regional Science Review, , vol. 32(1), pages 65-91, January.
    9. N. Gregory Mankiw & David Romer & David N. Weil, 1992. "A Contribution to the Empirics of Economic Growth," The Quarterly Journal of Economics, Oxford University Press, vol. 107(2), pages 407-437.
    10. David Audretsch & Michael Fritsch, 2002. "Growth Regimes over Time and Space," Regional Studies, Taylor & Francis Journals, vol. 36(2), pages 113-124.
    11. Romer, Paul M, 1990. "Endogenous Technological Change," Journal of Political Economy, University of Chicago Press, vol. 98(5), pages 71-102, October.
    12. Manfred Fischer & Monika Bartkowska & Aleksandra Riedl & Sascha Sardadvar & Andrea Kunnert, 2009. "The impact of human capital on regional labor productivity in Europe," Letters in Spatial and Resource Sciences, Springer, vol. 2(2), pages 97-108, October.
    13. J. Barkley Rosser, 2009. "Introduction," Chapters,in: Handbook of Research on Complexity, chapter 1 Edward Elgar Publishing.
    14. Lucas, Robert Jr., 1988. "On the mechanics of economic development," Journal of Monetary Economics, Elsevier, vol. 22(1), pages 3-42, July.
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    Cited by:

    1. Inés Moreno de Barreda & Gilat Levy & Ronny Razin, 2017. "Persuasion with Correlation Neglect: Media Power via Correlation of News Content," Economics Series Working Papers 836, University of Oxford, Department of Economics.
    2. Ungeheuer, Michael & Weber, Martin, 2016. "The Perception of Dependence, Investment Decisions, and Stock Prices," CEPR Discussion Papers 11585, C.E.P.R. Discussion Papers.
    3. Ungeheuer, Michael & Weber, Martin, 2016. "The Perception of Dependence and Investment Decisions," CEPR Discussion Papers 11188, C.E.P.R. Discussion Papers.
    4. David B. Johnson & Matthew D. Webb, 2017. "An Experimental Test of the No Safety Schools Theorem," Carleton Economic Papers 17-10, Carleton University, Department of Economics.
    5. Daniel Gottlieb & Kent Smetters, 2012. "Narrow Framing and Life Insurance," NBER Working Papers 18601, National Bureau of Economic Research, Inc.

    More about this item

    Keywords

    Portfolio choice; correlation neglect; 1/n heuristic; biases in beliefs;

    JEL classification:

    • B49 - Schools of Economic Thought and Methodology - - Economic Methodology - - - Other

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