Definition of knack for Students. 1  1 : a natural ability : talent She has a knack for making friends. 2  2 : a clever or skillful way of doing something : trick Skating is easy once you get the knack.
Brazil - GINI index. GINI index (World Bank estimate) The value for GINI index (World Bank estimate) in Brazil was 52.87 as of 2013. As the graph below shows, over the past 32 years this indicator reached a maximum value of 63.30 in 1989 and a minimum value of 52.67 in 2012.
Herfindahl Index What it is: The Herfindahl Index, also known as the Herfindahl-Hirschman Index (HHI), measures the market concentration of an industry's 50 largest firms in order to determine if the industry is competitive or nearing monopoly.