Hidden Skewness: On the Difficulty of Multiplicative Compounding under Random Shocks

Ludwig Ensthaler, Olga Nottmeyer, Georg Weizsäcker and Christian Zankiewicz

No 1337, Discussion Papers of DIW Berlin from DIW Berlin, German Institute for Economic Research

Abstract: Multiplicative growth processes that are subject to random shocks often have a skewed distribution of outcomes. In a number of incentivized laboratory experiments we show that a large majority of participants either strongly underestimate skewness or ignore it completely. Participants misperceive the outcome distribution's spread to be far too narrow-band and they estimate the median to lie too close to the distribution's center. The observed bias in expectations is irrespective to risk preferences and fairly robust to feedback. It is consistent with a behavioral model in which geometric growth is confused with linear growth. The misperception is a possible explanation of investors' difficulties with real-world financial products like leveraged ETFs.

Keywords: Behavioral Economics; Multiplicative Compounding; Skewness Neglect; Exponential Growth Bias (search for similar items in EconPapers)
JEL-codes: C91 D14 D3 G2 (search for similar items in EconPapers)
Pages: 35 p.
Date: 2013
New Economics Papers: this item is included in nep-cbe
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Citations: View citations in EconPapers (12)

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Related works:
Journal Article: Hidden Skewness: On the Difficulty of Multiplicative Compounding Under Random Shocks (2018)
Working Paper: Hidden skewness: On the difficulty of multiplicative compounding under random shocks (2015)
Working Paper: Hidden Skewness: On the Difficulty of Multiplicative Compounding under Random Shocks (2014)
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