The equivalent measure used here assigns a weight of 1.0 to all persons over 15, and 0.5 for those under age 15.
For more information and proper citation see http://www.rug.nl/research/ggdc/data/pwt/pwt-7.1
Source Indicator: rgdpeqa
Source: University of Pennsylvania
Release: Penn World Table 7.1
University of Pennsylvania, Purchasing Power Parity Converted GDP Chain per equivalent adult for Czech Republic [RGDPEQCZA626NUPN], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/RGDPEQCZA626NUPN, April 29, 2016.