(Bloomberg) -- The oft-cited line that the top 1% of U.S. households lay claim to 30% of all wealth is probably an understatement, according to a European Central Bank working paper.
Incorporating missed data on rich households pushes the share of wealth held by top earners up to between 35% and 37%, wrote Philip Vermeulen, a senior economist at the ECB. Thats higher than the 34% suggested by the 2010 U.S. Survey of Consumer Finances data from the Federal Reserve.
Our knowledge of the wealth distribution is less than perfect, Vermeulen wrote. The results clearly indicate that survey wealth estimates are very likely to underestimate wealth at the top.
Richer households have a lower response rate to surveys measuring their assets, so holdings are undervalued, Vermeulen wrote. He uses data from Forbes billionaires lists in his analysis to provide new wealth distribution estimates for the U.S. and nine European nations.
Though the U.S. change is marginal, the author writes, the effect in the Netherlands is much larger. Incorporating billionaires list pushes its concentration at the top to between 12 percent and 17% -- close to nations such as Spain and Belgium -- compared to the 9% concentration survey data would suggest.
The working paper represents the views of the author and doesnt reflect those of the ECB, according to the study, which was released this month.
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